TABLE  allwise_sc

This table contains the parameters provided for each source in the AllWISE Source Catalogue (Nov 13, 2013 - AllWISE Data Release). WFAU gratefully acknowledges help from IPAC at Caltech in enabling a bulk download of the entire catalogue for local deployment in the VSA/WSA. Any issues encountered or questions raised in use of this incarnation of the IPAC IRSA catalogue should be communicated to the vsa- or wsa-support helpdesks in the first instance. For a complete description please see the Explanatory Supplement to the AllWISE Data Release Products. Required constraints: Primary key is (cntr)

Name	Type	Length	Unit	Description	Default Value	Unified Content Descriptor
designation	varchar	20		Sexagesimal, equatorial position-based source name in the form: hhmmss.ss+ddmmss.s. The full naming convention for AllWISE Source Catalog sources has the form "WISEA Jhhmmss.ss+ddmmss.s," where "WISEA" indicates the source is from the AllWISE Source Catalog, and "J" indicates the position is J2000. The "WISEA" acronym is not listed explicitly in the designation column. The acronym for entries in the AllWISE Reject Table is "WISEAR". CAUTION: Source designations should not be used as an astrometric reference. They are not a substitute for the source position information in the ra and dec columns.
ra	float	8	deg	J2000 right ascension with respect to the 2MASS PSC reference frame from the non-moving source extraction.
dec	float	8	deg	J2000 declination with respect to the 2MASS PSC reference frame from the non-moving source extraction.
sigra	float	8	arcsec	One-sigma uncertainty in right ascension coordinate from the non-moving source extraction.
sigdec	float	8	arcsec	One-sigma uncertainty in declination coordinate from the non-moving source extraction.
sigradec	float	8	arcsec	The co-sigma of the equatorial position uncertainties, sigra, sigdec (σα, σδ). The covariance between the position errors, Vαδ, can be derived from the quoted co-sigma, σαδ, by the formula Vαδ = σαδ×|σαδ|. This maintains the sign information for the covariance since σαδ may be negative. It is more natural to carry the co-sigma along with the other uncertainties instead of the covariance because the former is in the same units as the other uncertainties.
glon	float	8	deg	Galactic longitude, computed from the non-moving source fit equatorial position. CAUTION: This coordinate should not be used as an astrometric reference.
glat	float	8	deg	Galactic latitude computed from the non-moving source fit equatorial position. CAUTION: This coordinate should not be used as an astrometric reference.
elon	float	8	deg	Ecliptic longitude computed from the non-moving source fit equatorial position. CAUTION: This coordinate should not be used as an astrometric reference.
elat	float	8	deg	Ecliptic latitude computed from the non-moving source fit equatorial position. CAUTION: This coordinate should not be used as an astrometric reference.
wx	float	8	pix	The x-pixel coordinate of this source on the Atlas Image.
wy	float	8	pix	The y-pixel coordinate of this source on the Atlas Image.
cntr	bigint	8		Unique identification number for this object in the AllWISE Catalog/Reject Table. This number is formed from the source_id, which is in turn formed from the coadd_id and source number, src.
source_id	varchar	28		Unique source ID, formed from a combination of the Atlas Tile ID, coadd_id, and sequential extracted source number, src, within the Tile.
coadd_id	varchar	20		Atlas Tile identifier from which source was extracted.
src	int	4		Sequential number of the source extraction in the Atlas Tile from in which this source detected and measured, in approximate descending order of W1 source brightness.
w1mpro	float	8	mag	W1 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W1 flux measurement has SNR<2. This column is null if the source is nominally detected in W1, but no useful brightness estimate could be made.
w1sigmpro	float	8	mag	W1 profile-fit photometric measurement uncertainty in mag units. This column is null if the W1 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.
w1snr	float	8		W1 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w1flux) to flux uncertainty (w1sigflux)in the W1 profile-fit photometry measurement. This column is null if w1flux is negative, or if w1flux or w1sigflux are null.
w1rchi2	real	4		Reduced χ2 of the W1 profile-fit photometry measurement. This column is null if the W1 magnitude is a 95% confidence upper limit (i.e. the source is not detected).
w2mpro	float	8	mag	W2 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W2 flux measurement has SNR<2. This column is null if the source is nominally detected in W2, but no useful brightness estimate could be made.
w2sigmpro	float	8	mag	W2 profile-fit photometric measurement uncertainty in mag units. This column is null if the W2 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.
w2snr	float	8		W2 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w2flux) to flux uncertainty (w2sigflux)in the W2 profile-fit photometry measurement. This column is null if w2flux is negative, or if w2flux or w2sigflux are null.
w2rchi2	real	4		Reduced χ2 of the W2 profile-fit photometry measurement. This column is null if the W2 magnitude is a 95% confidence upper limit (i.e. the source is not detected).
w3mpro	float	8	mag	W3 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W3 flux measurement has SNR<2. This column is null if the source is nominally detected in W3, but no useful brightness estimate could be made.
w3sigmpro	float	8	mag	W3 profile-fit photometric measurement uncertainty in mag units. This column is null if the W3 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.
w3snr	float	8		W3 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w3flux) to flux uncertainty (w3sigflux)in the W3 profile-fit photometry measurement. This column is null if w3flux is negative, or if w3flux or w3sigflux are null.
w3rchi2	real	4		Reduced χ2 of the W3 profile-fit photometry measurement. This column is null if the W3 magnitude is a 95% confidence upper limit (i.e. the source is not detected).
w4mpro	float	8	mag	W4 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W4 flux measurement has SNR<2. This column is null if the source is nominally detected in W4, but no useful brightness estimate could be made.
w4sigmpro	float	8	mag	W4 profile-fit photometric measurement uncertainty in mag units. This column is null if the W4 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable.
w4snr	float	8		W4 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w4flux) to flux uncertainty (w4sigflux)in the W4 photometry measurement. This column is null if w4flux is negative, or if w4flux or w4sigflux are null.
w4rchi2	real	4		Reduced χ2 of the W4 profile-fit photometry measurement. This column is null if the W4 magnitude is a 95% confidence upper limit (i.e. the source is not detected).
rchi2	real	4		Combined reduced χ2 in all bands for the profile-fit photometry measurement.
nb	int	4		Number of PSF components used simultaneously in the profile-fitting for this source. This number includes the source itself, so the minimum value of nb is "1". Nb is greater than "1" when the source is fit concurrently with other nearby detections (passive deblending), or when a single source is split into two components during the fitting process (active deblending).
na	int	4		Active deblending flag. Indicates if a single detection was split into multiple sources in the process of profile-fitting: 0 - the source is not actively deblended; 1 - the source is actively deblended.
w1sat	float	8		Saturated pixel fraction, W1. The fraction of all pixels within the profile-fitting area in the stack of single-exposure images used to characterize this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W1]~8 mag. Saturation may occur in fainter sources because of charged particle strikes, or if the source is covered by 3-Band Cryo single-exposures that began to saturate because of rising temperatures.
w2sat	float	8		Saturated pixel fraction, W2. The fraction of all pixels within the profile-fitting area in the stack of single-exposure images used to characterize this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W2]~7 mag. Saturation may occur in fainter sources because of charged particle strikes.
w3sat	float	8		Saturated pixel fraction, W3. The fraction of all pixels within the profile-fitting area source in the stack of single-exposure images used to characterize this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W3]~4 mag. Saturation may occur in fainter sources because of charged particle strikes.
w4sat	float	8		Saturated pixel fraction, W4. The fraction of all pixels within the profile-fitting area in the stack of single-exposure images used to characterize this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W4]~0 mag. Saturation may occur in fainter sources because of charged particle strikes.
satnum	varchar	4		Minimum sample at which saturation occurs in each band. Four character string, one character per band, that indicates the minimum SUTR sample in which any pixel in the profile-fitting area in all of the single-exposure images used to characterize this source was flagged as having reached the saturation level in the on-board WISE payload processing. If no pixels in a given band are flagged as saturated, the value for that band is "0".
ra_pm	float	8	deg	Right ascension at epoch MJD=55400.0 (2010.5589) from the profile-fitting measurement model that includes motion. This column is null if the fit failed to converge or was not attempted. NOTE: This will be similar but not identical to the value of ra which is the measured right ascenscion of the source from the non-moving profile-fit.
dec_pm	float	8	deg	Declination at epoch MJD=55400.0 (2010.5589) from the profile-fitting measurement model that includes motion. This column is null if the fit failed to converge or was not attempted. NOTE: This will be similar but not identical to the value of dec which is the measured declination of the source from the non-moving profile-fit.
sigra_pm	float	8	arcsec	One-sigma uncertainty in right ascension from the profile-fitting measurement model that includes motion. This column is null if the motion-fit failed to converge or was not attempted.
sigdec_pm	float	8	arcsec	One-sigma uncertainty in declination from the profile-fitting measurement model that includes motion. This column is null if the motion-fit failed to converge or was not attempted.
sigradec_pm	float	8	arcsec	The co-sigma of the equatorial position uncertainties from the profile-fitting measurement model that includes motion, sigra_pm, sigdec_pm (σα_pm, σδ_pm). The covariance between the position errors, Vα_pmδ_pm, can be derived from the quoted co-sigma, σα_pmδ_pm, by the formula α_pmδ_pm = σα_pmδ_pm×|σα_pmδ_pm|. This maintains the sign information for the covariance since σα_pmδ_pm may be negative. It is more natural to carry the co-sigma along with the other uncertainties instead of the covariance because the former is in the same units as the other uncertainties. This column is null if the motion-fit failed to converge or was not attempted.
pmra	int	4	mas/year	The apparent motion in right ascension estimated for this source. This column is null if the motion fit failed to converge or was not attempted. CAUTION: This is the total motion in right ascension, and not the proper motion. The apparent motion can be significantly affected by parallax for nearby objects.
sigpmra	int	4	mas/year	Uncertainty in the RA motion estimation. This column is null if the motion fit failed to converge or was not attempted.
pmdec	int	4	mas/year	The apparent motion in declination estimated for this source. This column is null if the motion fit failed to converge or was not attempted. CAUTION: This is the total motion in declination, and not the proper motion. The apparent motion can be significantly affected by parallax for nearby objects.
sigpmdec	int	4	mas/year	Uncertainty in the Dec motion estimated for this source. This column is null if the motion fit failed to converge or was not attempted.
w1rchi2_pm	real	4		Reduced χ2 of the W1 profile-fit photometry measurement including motion estimation. This column is null if the source is not detected in W1, or if the motion fit failed to converge or was not attempted.
w2rchi2_pm	real	4		Reduced χ2 of the W2 profile-fit photometry measurement including motion estimation. This column is null if the source is not detected in W2 magnitude or if the motion fit failed to converge or was not attempted.
w3rchi2_pm	real	4		Reduced χ2 of the W3 profile-fit photometry measurement including motion estimation. This column is null if the source is not detected in W3 or if the motion fit failed to converge or was not attempted.
w4rchi2_pm	real	4		Reduced χ2 of the W4 profile-fit photometry measurement including motion estimation. This column is null if the source is not detected in W4 or if the motion fit failed to converge or was not attempted.
rchi2_pm	real	4		Combined reduced χ2 in all bands for the profile-fit photometry measurement that includes source motion. This column is null if the motion fit failed to converge or was not attempted.
pmcode	varchar	5		This is a five character string that encodes information about factors that impact the accuracy of the motion estimation. These include the original blend count, whether a blend-swap took place, and the distance in hundredths of an arcsecond between the non-motion position and the motion mean-observation-epoch position. This column is null if a motion solution was not attempted or a valid solution was not found.
cc_flags	varchar	4		Contamination and confusion flag. Four character string, one character per band [W1/W2/W3/W4], that indicates that the photometry and/or position measurements of a source may be contaminated or biased due to proximity to an image artifact. CAUTION: Non-zero cc_flags values in any band indicate the the measurement in that band may be contaminated and the photometry should be used with caution.
rel	varchar	1		Small-separation, same-Tile (SSST) detection flag. Non-null values of this flag indicate that this Catalog/Reject Table entry is part of a group of detections with unphysically small separations that were extracted on the same Tile. SSST groups occurred when a faint, often spurious noise detection was shifted towards the position of a brighter nearby source during the chi-squared minimization profile-fit source extraction process. This resulted in two or more extractions on the same Tile that have nearly the same position and similar fluxes. SSST groups were identified and classified using the rel flag, and the classifications are used as part of Catalog source selection.
ext_flg	int	4		Extended source flag. This is an integer flag, the value of which indicates whether or not the morphology of a source is consistent with the WISE point spread function in any band, or whether the source is associated with or superimposed on a previously known extended object from the 2MASS Extended Source Catalog (XSC). CAUTION: WISE profile-fit (w?mpro) and standard aperture (w?mag) measurements are optimized for point sources and will systematically underestimate the true flux of resolved objects. If a source entry has ext_flg>0, you may wish to examine the large aperture photometry, or the elliptical aperture photometry which are measured using areas that are scaled from 2MASS XSC morphologies.
var_flg	varchar	4		Variability flag. The variability flag is a four-character string, one character per band, in which the value for each band is related to the probability that the source flux measured on the individual WISE exposures was not constant with time. The probability calculation uses the standard deviation of the single exposure flux measurements, w?sigp1, as well as the band-to-band flux correlation significance, q12,q23,q34. CAUTION: Estimation of flux variability is unreliable for sources that are extended (ext_flg>0), and sources whose measurements are contaminated by image artifacts in a band (cc_flags[b] != '0').
ph_qual	varchar	4		Photometric quality flag. Four character flag, one character per band [W1/W2/W3/W4], that provides a shorthand summary of the quality of the profile-fit photometry measurement in each band, as derived from the measurement signal-to-noise ratio.
det_bit	int	4		Bit-encoded integer indicating bands in which a source has a w?snr>2 detection. For example, a source detected in W1 only has det_bit=1 (binary 0001). A source detected in W4 only has det_bit=8 (binary 1000). A source detected in all four bands has det_bit=15 (binary 1111).
moon_lev	varchar	4		Scattered moonlight contamination flag. This is a four-character string, one character per band, in which the value is an integer indicates the fraction of single-exposure frames on which the source was measured that were possibly contaminated by scattered moonlight. The value in each band is given by [ceiling(#frmmoon/#frames*10)], with a maximum value of 9, where #frmmoon is the number of affected frames and #frames is the total number of frames on which the source was measured.
w1nm	int	4		Integer frame detection count. This column gives the number of individual 7.7s exposures on which this source was detected with SNR>3 in the W1 profile-fit measurement. This number can be zero for sources that are well-detected on the coadded Atlas Image, but too faint for detection on the single exposures.
w1m	int	4		Integer frame coverage. This column gives the number of individual 7.7s W1 exposures on which a profile-fit measurement of this source was possible. This number can differ between the four bands because band-dependent criteria are used to select individual frames for inclusion in the coadded Atlas Images. This column is null if there is no frame coverage in this band at the position of this source. CAUTION: The value of w1m may be lower than expected for sources that were covered by saturated 3-Band Cryo single-exposures. A sign of this is if w1m differs significantly from w1cov.
w2nm	int	4		Integer frame detection count. This column gives the number of individual 7.7s exposures on which this source was detected with SNR>3 in the W2 profile-fit measurement. This number can be zero for sources that are well-detected on the coadded Atlas Image, but too faint for detection on the single exposures.
w2m	int	4		Integer frame coverage. This column gives the number of individual 7.7s W2 exposures on which a profile-fit measurement of this source was possible. This number can differ between the four bands because band-dependent criteria are used to select individual frames for inclusion in the coadded Atlas Images. This column is null if there is no frame coverage in this band at the position of this source.
w3nm	int	4		Integer frame detection count. This column gives the number of individual 8.8s exposures on which this source was detected with SNR>3 in the W3 profile-fit measurement. This number can be zero for sources that are well-detected on the coadded Atlas Image, but too faint for detection on the single exposures.
w3m	int	4		Integer frame coverage. This column gives the number of individual 8.8s W3 exposures on which a profile-fit measurement of this source was possible. This number can differ between the four bands because band-dependent criteria are used to select individual frames for inclusion in the coadded Atlas Images. This column is null if there is no frame coverage in this band at the position of this source.
w4nm	int	4		Integer frame detection count. This column gives the number of individual 8.8s exposures on which this source was detected with SNR>3 in the W4 profile-fit measurement. This number can be zero for sources that are well-detected on the coadded Atlas Image, but too faint for detection on the single exposures.
w4m	int	4		Integer frame coverage. This column gives the number of individual 8.8s W4 exposures on which a profile-fit measurement of this source was possible. This number can differ between the four bands because band-dependent criteria are used to select individual frames for inclusion in the coadded Atlas Images. This column is null if there is no frame coverage in this band at the position of this source.
w1cov	float	8		Mean pixel coverage in W1. This column gives the mean pixel value from the W1 Atlas Tile Coverage Map within the "standard" aperture, a circular area with a radius of 8.25" centered on the position of this source.
w2cov	float	8		Mean pixel coverage in W2. This column gives the mean pixel value from the W2 Atlas Tile Coverage Map within the "standard" aperture, a circular area with a radius of 8.25" centered on the position of this source.
w3cov	float	8		Mean pixel coverage in W3. This column gives the mean pixel value from the W3 Atlas Tile Coverage Map within the "standard" aperture, a circular area with a radius of 8.25" centered on the position of this source.
w4cov	float	8		Mean pixel coverage in W4. This column gives the mean pixel value from the W4 Atlas Tile Coverage Map within the "standard" aperture, a circular area with a radius of 16.5" centered on the position of this source.
w1cc_map	int	4		Contamination and confusion map for this source in W1. This column contains the integer equivalent of the 9-bit binary number that specifies if the W1 measurement is believed to be contaminated by or a spurious detection of an image artifact.
w1cc_map_str	varchar	9		Contamination and confusion string. This column is a character string that denotes all artifacts that may contaminate the W1 measurement of this source, in the priority order D,P,H,O,d,p,h,o. Lower-case letters denote cases where the source detection in this band is believed to be real but the measurement may be contaminated by the artifact. upper-case letters denote cases where the source detection in this band may be a spurious detection of an artifact. This string is "null" if there are no artifacts that affect the measurement in this band. The value that appears in first element of the cc_flags string is the left-most character in w1cc_map_str. If w1cc_map_str is "null", then the corresponding cc_flags entry is "0".
w2cc_map	int	4		Contamination and confusion map for this source in W2. This column contains the integer equivalent of the 9-bit binary number that specifies if the W2 measurement is believed to be contaminated by or a spurious detection of an image artifact.
w2cc_map_str	varchar	9		Contamination and confusion string. This column is a character string that denotes all artifacts that may contaminate the W2 measurement of this source, in the priority order D,P,H,O,d,p,h,o. Lower-case letters denote cases where the source detection in this band is believed to be real but the measurement may be contaminated by the artifact. Upper-case letters denote cases where the source detection in this band may be a spurious detection of an artifact. This string is "null" if there are no artifacts that affect the measurement in this band. The value that appears in second element of the cc_flags string is the left-most character in w2cc_map_str. If w2cc_map_str is "null", then the corresponding cc_flags entry is "0".
w3cc_map	int	4		Contamination and confusion map for this source in W3. This column contains the integer equivalent of the 9-bit binary number that specifies if the W3 measurement is believed to be contaminated by or a spurious detection of an image artifact.
w3cc_map_str	varchar	9		Contamination and confusion string. This column is a character string that denotes all artifacts that may contaminate the W3 measurement of this source, in the priority order D,P,H,O,d,p,h,o. Lower-case letters denote cases where the source detection in this band is believed to be real but the measurement may be contaminated by the artifact. Upper-case letters denote cases where the source detection in this band may be a spurious detection of an artifact. This string is "null" if there are no artifacts that affect the measurement in this band. The value that appears in third element of the cc_flags string is the left-most character in w3cc_map_str. If w3cc_map_str is "null", then the corresponding cc_flags entry is "0".
w4cc_map	int	4		Contamination and confusion map for this source in W4. This column contains the integer equivalent of the 9-bit binary number that specifies if the W4 measurement is believed to be contaminated by or a spurious detection of an image artifact.
w4cc_map_str	varchar	9		Contamination and confusion string. This column is a character string that denotes all artifacts that may contaminate the W4 measurement of this source, in the priority order D,P,H,O,d,p,h,o. Lower-case letters denote cases where the source detection in this band is believed to be real but the measurement may be contaminated by the artifact. Upper-case letters denote cases where the source detection in this band may be a spurious detection of an artifact. This string is "null" if there are no artifacts that affect the measurement in this band. The value that appears in fourth element of the cc_flags string is the left-most character in w4cc_map_str. If w4cc_map_str is "null", then the corresponding cc_flags entry is "0".
best_use_cntr	bigint	8		Cntr identification value of the source extraction that was selected as a candidate Catalog source in the duplicate resolution process for the group of associated sources that included this extraction. For the AllWISE Source Catalog, best_use_cntr = cntr. For the AllWISE Reject Table, best_use_cntr may be the cntr value of a corresponding source in the AllWISE Source Catalog.
ngrp	smallint	2		Excess number of positionally associated duplicate resolution groups in which this extractions was included. Values of ngrp>0 indicate that the source was associated with more than one possible group. CAUTION: In the All-Sky Release Catalog and 3-Band Cryo Source Working Database, this column indicated the total number of groups with which a source was associated. In the AllWISE Catalog and Reject Table, ngrp is the total number of groups minus one.
w1flux	real	4	dn	The "raw" W1 source flux measured in profile-fit photometry in units of digital numbers. This value may be negative. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels.
w1sigflux	real	4	dn	Uncertainty in the "raw" W1 source flux measurement in profile-fit photometry in units of digital numbers. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels.
w1sky	float	8	dn	The trimmed average of the W1 sky background value in digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". Both profile-fit and aperture photometry source brightness measurements are made relative to this sky background value.
w1sigsk	float	8	dn	The uncertainty in the W1 sky background value in units of digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70".
w1conf	float	8	dn	Estimated confusion noise in the W1 sky background annulus, in digital numbers. This number is the difference between the measured noise in the sky background w1sigsk and the noise measured in the same region on the Atlas Uncertainty Maps.
w2flux	real	4	dn	The "raw" W2 source flux measured in profile-fit photometry in units of digital numbers. This value may be negative. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels.
w2sigflux	real	4	dn	Uncertainty in the "raw" W2 source flux measurement in profile-fit photometry in units of digital numbers. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels.
w2sky	float	8	dn	The trimmed average of the W2 sky background value in digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". Both profile-fit and aperture photometry source brightness measurements are made relative to this sky background value.
w2sigsk	float	8	dn	The uncertainty in the W2 sky background value in units of digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70".
w2conf	float	8	dn	Estimated confusion noise in the W2 sky background annulus, in digital numbers. This number is the difference between the measured noise in the sky background w2sigsk and the noise measured in the same region on the Atlas Uncertainty Maps.
w3flux	real	4	dn	The "raw" W3 source flux measured in profile-fit photometry in units of digital numbers. This value may be negative. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels.
w3sigflux	real	4	dn	Uncertainty in the "raw" W3 source flux measurement in profile-fit photometry in units of digital numbers. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels.
w3sky	float	8	dn	The trimmed average of the W3 sky background value in digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". Both profile-fit and aperture photometry source brightness measurements are made relative to this sky background value.
w3sigsk	float	8	dn	The uncertainty in the W3 sky background value in units of digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70".
w3conf	float	8	dn	Estimated confusion noise in the W3 sky background annulus, in digital numbers. This number is the difference between the measured noise in the sky background w3sigsk and the noise measured in the same region on the Atlas Uncertainty Maps.
w4flux	real	4	dn	The "raw" W4 source flux measured in profile-fit photometry in units of digital numbers. This value may be negative. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels.
w4sigflux	real	4	dn	Uncertainty in the "raw" W4 source flux measurement in profile-fit photometry in units of digital numbers. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels.
w4sky	float	8	dn	The trimmed average of the W4 sky background value in digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". Both profile-fit and aperture photometry source brightness measurements are made relative to this sky background value.
w4sigsk	float	8	dn	The uncertainty in the W4 sky background value in units of digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70".
w4conf	float	8	dn	Estimated confusion noise in the W4 sky background annulus, in digital numbers. This number is the difference between the measured noise in the sky background w4sigsk and the noise measured in the same region on the Atlas Uncertainty Maps.
w1mag	float	8	mag	W1 "standard" aperture magnitude. This is the curve-of-growth corrected source brightness measured in an 8.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". The curve-of-growth correction is given in w1mcor. This column is null if an aperture measurement was not possible in W1.
w1sigm	float	8	mag	Uncertainty in the W1 "standard" aperture magnitude. This column is null if the W1 "standard" aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg	int	4		W1 "standard" aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1mcor	float	8	mag	W1 aperture curve-of-growth correction, in magnitudes. This correction is subtracted from the nominal 8.25" aperture photometry brightness, w1mag_2, to give the "standard-aperture" magnitude.
w2mag	float	8	mag	W2 "standard" aperture magnitude. This is the curve-of-growth corrected source brightness measured in an 8.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". The curve-of-growth correction is given in w2mcor. This column is null if an aperture measurement was not possible in W2.
w2sigm	float	8	mag	Uncertainty in the W2 "standard" aperture magnitude. This column is null if the W2 "standard" aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg	int	4		W2 "standard" aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mcor	float	8	mag	W2 aperture curve-of-growth correction, in magnitudes. This correction is subtracted from the nominal 8.25" aperture photometry brightness, w2mag_2, to give the "standard-aperture" magnitude.
w3mag	float	8	mag	W3 "standard" aperture magnitude. This is the curve-of-growth corrected source brightness measured in an 8.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". The curve-of-growth correction is given in w3mcor. This column is null if an aperture measurement was not possible in W3.
w3sigm	float	8	mag	Uncertainty in the W3 "standard" aperture magnitude. This column is null if the W3 "standard" aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg	int	4		W3 "standard" aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mcor	float	8	mag	W3 aperture curve-of-growth correction, in magnitudes. This correction is subtracted from the nominal 8.25" aperture photometry brightness, w3mag_2, to give the "standard-aperture" magnitude.
w4mag	float	8	mag	W4 "standard" aperture magnitude. This is the curve-of-growth corrected source brightness measured in a 16.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". The curve-of-growth correction is given in w4mcor. This column is null if an aperture measurement was not possible in W4.
w4sigm	float	8	mag	Uncertainty in the W4 "standard" aperture magnitude. This column is null if the W4 "standard" aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg	int	4		W4 "standard" aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mcor	float	8	mag	W4 aperture curve-of-growth correction, in magnitudes. This correction is subtracted from the nominal 16.5" aperture photometry brightness, w4mag_2, to give the "standard-aperture" magnitude.
w1mag_1	float	8		W1 5.5" radius aperture magnitude. This is the calibrated source brightness measured in a 5.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W1.
w1sigm_1	float	8	mag	Uncertainty in the W1 5.5" radius aperture magnitude. This column is null if the the 5.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg_1	int	4		W1 5.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mag_1	float	8	mag	W2 5.5" radius aperture magnitude. This is the calibrated source brightness measured in a 5.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W2.
w2sigm_1	float	8	mag	Uncertainty in the W2 5.5" radius aperture magnitude. This column is null if the the 5.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg_1	int	4		W2 5.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mag_1	float	8	mag	W3 5.5" radius aperture magnitude. This is the calibrated source brightness measured in a 5.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W3.
w3sigm_1	float	8	mag	Uncertainty in the W3 5.5" radius aperture magnitude. This column is null if the the 5.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg_1	int	4		W3 5.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mag_1	float	8	mag	W4 11.0" radius aperture magnitude. This is the calibrated source brightness measured in a 11.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W4.
w4sigm_1	float	8	mag	Uncertainty in the W4 11.0" radius aperture magnitude. This column is null if the the 11.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg_1	int	4		W4 11.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1mag_2	float	8	mag	W1 8.25" radius aperture magnitude. This is the calibrated source brightness measured in a 8.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W1.
w1sigm_2	float	8	mag	Uncertainty in the W1 8.25" radius aperture magnitude. This column is null if the the 8.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg_2	int	4		W1 8.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mag_2	float	8	mag	W2 8.25" radius aperture magnitude. This is the calibrated source brightness measured in a 8.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W2.
w2sigm_2	float	8	mag	Uncertainty in the W2 8.25" radius aperture magnitude. This column is null if the the 8.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg_2	int	4		W2 8.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mag_2	float	8	mag	W3 8.25" radius aperture magnitude. This is the calibrated source brightness measured in a 8.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W3.
w3sigm_2	float	8	mag	Uncertainty in the W3 8.25" radius aperture magnitude. This column is null if the the 8.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg_2	int	4		W3 8.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mag_2	float	8	mag	W4 16.5" radius aperture magnitude. This is the calibrated source brightness measured in a 16.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W4.
w4sigm_2	float	8	mag	Uncertainty in the W4 16.5" radius aperture magnitude. This column is null if the the 16.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg_2	int	4		W4 16.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1mag_3	float	8	mag	W1 11.0" radius aperture magnitude. This is the calibrated source brightness measured in a 11.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W1.
w1sigm_3	float	8	mag	Uncertainty in the W1 11.0" radius aperture magnitude. This column is null if the the 11.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg_3	int	4		W1 11.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mag_3	float	8	mag	W2 11.0" radius aperture magnitude. This is the calibrated source brightness measured in a 11.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W2.
w2sigm_3	float	8	mag	Uncertainty in the W2 11.0" radius aperture magnitude. This column is null if the the 11.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg_3	int	4		W2 11.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mag_3	float	8	mag	W3 11.0" radius aperture magnitude. This is the calibrated source brightness measured in a 11.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W3.
w3sigm_3	float	8	mag	Uncertainty in the W3 11.0" radius aperture magnitude. This column is null if the the 11.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg_3	int	4		W3 11.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mag_3	float	8	mag	W4 22.0" radius aperture magnitude. This is the calibrated source brightness measured in a 22.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W4.
w4sigm_3	float	8	mag	Uncertainty in the W4 22.0" radius aperture magnitude. This column is null if the the 22.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg_3	int	4		W4 22.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1mag_4	float	8	mag	W1 13.75" radius aperture magnitude. This is the calibrated source brightness measured in a 13.75" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W1.
w1sigm_4	float	8	mag	Uncertainty in the W1 13.75" radius aperture magnitude. This column is null if the the 13.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg_4	int	4		W1 13.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mag_4	float	8	mag	W2 13.75" radius aperture magnitude. This is the calibrated source brightness measured in a 13.75" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W2.
w2sigm_4	float	8	mag	Uncertainty in the W2 13.75" radius aperture magnitude. This column is null if the the 13.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg_4	int	4		W2 13.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mag_4	float	8	mag	W3 13.75" radius aperture magnitude. This is the calibrated source brightness measured in a 13.75" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W3.
w3sigm_4	float	8	mag	Uncertainty in the W3 13.75" radius aperture magnitude. This column is null if the the 13.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg_4	int	4		W3 13.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mag_4	float	8	mag	W4 27.5" radius aperture magnitude. This is the calibrated source brightness measured in a 27.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied.This column is null if an aperture measurement was not possible in W4.
w4sigm_4	float	8	mag	Uncertainty in the W4 27.5" radius aperture magnitude. This column is null if the the 27.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg_4	int	4		W4 27.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1mag_5	float	8	mag	W1 16.5" radius aperture magnitude. This is the calibrated source brightness measured in a 16.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W1.
w1sigm_5	float	8	mag	Uncertainty in the W1 16.5" radius aperture magnitude. This column is null if the the 16.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg_5	int	4		W1 16.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mag_5	float	8	mag	W2 16.5" radius aperture magnitude. This is the calibrated source brightness measured in a 16.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W2.
w2sigm_5	float	8	mag	Uncertainty in the W2 16.5" radius aperture magnitude. This column is null if the the 16.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg_5	int	4		W2 16.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mag_5	float	8	mag	W3 16.5" radius aperture magnitude. This is the calibrated source brightness measured in a 16.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W3.
w3sigm_5	float	8	mag	Uncertainty in the W3 16.5" radius aperture magnitude. This column is null if the the 16.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg_5	int	4		W3 16.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mag_5	float	8	mag	W4 33.0" radius aperture magnitude. This is the calibrated source brightness measured in a 33.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W4.
w4sigm_5	float	8	mag	Uncertainty in the W4 33.0" radius aperture magnitude. This column is null if the the 33.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg_5	int	4		W4 33.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1mag_6	float	8	mag	W1 19.25" radius aperture magnitude. This is the calibrated source brightness measured in a 19.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W1.
w1sigm_6	float	8	mag	Uncertainty in the W1 19.25" radius aperture magnitude. This column is null if the the 19.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg_6	int	4		W1 19.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mag_6	float	8	mag	W2 19.25" radius aperture magnitude. This is the calibrated source brightness measured in a 19.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W2.
w2sigm_6	float	8	mag	Uncertainty in the W2 19.25" radius aperture magnitude. This column is null if the the 19.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg_6	int	4		W2 19.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mag_6	float	8	mag	W3 19.25" radius aperture magnitude. This is the calibrated source brightness measured in a 19.25" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W3.
w3sigm_6	float	8	mag	Uncertainty in the W3 19.25" radius aperture magnitude. This column is null if the the 19.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg_6	int	4		W3 19.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mag_6	float	8	mag	W4 38.5" radius aperture magnitude. This is the calibrated source brightness measured in a 38.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W4.
w4sigm_6	float	8	mag	Uncertainty in the W4 38.5" radius aperture magnitude. This column is null if the the 38.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg_6	int	4		W4 38.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1mag_7	float	8	mag	W1 22.0" radius aperture magnitude. This is the calibrated source brightness measured in a 22.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W1.
w1sigm_7	float	8	mag	Uncertainty in the W1 22.0" radius aperture magnitude. This column is null if the the 22.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg_7	int	4		W1 22.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mag_7	float	8	mag	W2 22.0" radius aperture magnitude. This is the calibrated source brightness measured in a 22.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W2.
w2sigm_7	float	8	mag	Uncertainty in the W2 22.0" radius aperture magnitude. This column is null if the the 22.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg_7	int	4		W2 22.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mag_7	float	8	mag	W3 22.0" radius aperture magnitude. This is the calibrated source brightness measured in a 22.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W3.
w3sigm_7	float	8	mag	Uncertainty in the W3 22.0" radius aperture magnitude. This column is null if the the 22.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg_7	int	4		W3 22.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mag_7	float	8	mag	W4 44.0" radius aperture magnitude. This is the calibrated source brightness measured in a 44.0" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W4.
w4sigm_7	float	8	mag	Uncertainty in the W4 44.0" radius aperture magnitude. This column is null if the the 44.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg_7	int	4		W4 44.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1mag_8	float	8	mag	W1 24.75" radius aperture magnitude. This is the calibrated source brightness measured in a 24.75" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W1.
w1sigm_8	float	8	mag	Uncertainty in the W1 24.75" radius aperture magnitude. This column is null if the the 24.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w1flg_8	int	4		W1 24.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2mag_8	float	8	mag	W2 24.75" radius aperture magnitude. This is the calibrated source brightness measured in a 24.75" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W2.
w2sigm_8	float	8	mag	Uncertainty in the W2 24.75" radius aperture magnitude. This column is null if the the 24.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w2flg_8	int	4		W2 24.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3mag_8	float	8	mag	W3 24.75" radius aperture magnitude. This is the calibrated source brightness measured in a 24.75" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W3.
w3sigm_8	float	8	mag	Uncertainty in the W3 24.75" radius aperture magnitude. This column is null if the the 24.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w3flg_8	int	4		W3 24.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4mag_8	float	8	mag	W4 49.5" radius aperture magnitude. This is the calibrated source brightness measured in a 49.5" radius circular aperture centered on the source position on the Atlas Image. If the source is not detected in the aperture measurement, this is the 95% confidence upper limit to the brightness. The background sky reference level is measured in an annular region with inner radius of 50" and outer radius of 70". No curve-of-growth correction has been applied. This column is null if an aperture measurement was not possible in W4.
w4sigm_8	float	8	mag	Uncertainty in the W4 49.5" radius aperture magnitude. This column is null if the the 49.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible.
w4flg_8	int	4		W4 49.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w1magp	float	8	mag	Magnitude computed from the inverse-variance-weighted mean of the profile-fit flux measurements on the w1m individual W1 frames covering this source. This differs from w1mpro in that it is computed by combining the profile-fit measurements from individual frames, whereas w1mpro is computed by fitting all W1 frames simultaneously and incorporating a robust error model. This column is "null" if w1m=0, the mean flux is negative or if no individual frame measurements are possible. CAUTION: This is not a robust measurement of source brightness. It is provided as an internal repeatability diagnostic only. Users should always defer to w1mpro for the optimal flux measurement for point sources.
w1sigp1	float	8	mag	Standard deviation of the population of W1 fluxes measured on the w1m individual frames covering this source, in magnitudes. This provides a measure of the characteristic uncertainty of the measurement of this source on individual frames. This column is "null" if w1m<2 or if no individual frame measurements are possible.
w1sigp2	float	8	mag	Standard deviation of the mean of the distribution of W1 fluxes (w1magp) computed from profile-fit measurements on the w1m individual frames covering this source, in magnitudes. This is equivalent to w1sigp1/sqrt(w1m). This column is "null" if w1m<2 or if no individual frame measurements are possible.
w1k	float	8		Stetson K variability index (Stetson, P. 1996, PASP, 108, 851) computed using the W1 profile-fit fluxes measured on the individual single-exposure images. This column is null if there are <3 single-exposure measurements available in W1.
w1ndf	int	4		Number of degrees of freedom in the flux variability chi-square, W1.
w1mlq	float	8		Probability measure that the source is variable in W1 flux. The value is -ln(Q), where Q = 1 - P(χ2). P is the cumulative chi-square distribution probability for the flux sample measured on the individual single-exposure images. The value is clipped at 9.
w1mjdmin	float	8		The earliest modified Julian Date (mJD) of the W1 single-exposures covering the source.
w1mjdmax	float	8		The latest modified Julian Date (mJD) of the W1 single-exposures covering the source.
w1mjdmean	float	8		The average modified Julian Date (mJD) of the W1 single-exposures covering the source.
w2magp	float	8	mag	Magnitude computed from the inverse-variance-weighted mean of the profile-fit flux measurements on the w2m individual W2 frames covering this source. This differs from w2mpro in that it is computed by combining the profile-fit measurements from individual frames, whereas w2mpro is computed by fitting all W2 frames simultaneously and incorporating a robust error model. This column is "null" if w2m=0, the mean flux is negative or if no individual frame measurements are possible. CAUTION: This is not a robust measurement of source brightness. It is provided as an internal repeatability diagnostic only. Users should always defer to w2mpro for the optimal flux measurement for point sources.
w2sigp1	float	8	mag	Standard deviation of the population of W2 fluxes measured on the w2m individual frames covering this source, in magnitudes. This provides a measure of the characteristic uncertainty of the measurement of this source on individual frames. This column is "null" if w2m<2 or if no individual frame measurements are possible.
w2sigp2	float	8	mag	Standard deviation of the mean of the distribution of W2 fluxes (w2magp) computed from profile-fit measurements on the w2m individual frames covering this source, in magnitudes. This is equivalent to w2sigp1/sqrt(w2m). This column is "null" if w2m<2 or if no individual frame measurements are possible.
w2k	float	8		Stetson K variability index (Stetson, P. 1996, PASP, 108, 851) computed using the W2 profile-fit fluxes measured on the individual single-exposure images. This column is null if there are <3 single-exposure measurements available in W2.
w2ndf	int	4		Number of degrees of freedom in the flux variability chi-square, W2.
w2mlq	float	8		Probability measure that the source is variable in W2 flux. The value is -ln(Q), where Q = 1 - P(χ2). P is the cumulative chi-square distribution probability for the flux sample measured on the individual single-exposure images. The value is clipped at 9.
w2mjdmin	float	8		The earliest modified Julian Date (mJD) of the W2 single-exposures covering the source.
w2mjdmax	float	8		The latest modified Julian Date (mJD) of the W2 single-exposures covering the source.
w2mjdmean	float	8		The average modified Julian Date (mJD) of the W2 single-exposures covering the source.
w3magp	float	8	mag	Magnitude computed from the inverse-variance-weighted mean of the profile-fit flux measurements on the w3m individual W3 frames covering this source. This differs from w3mpro in that it is computed by combining the profile-fit measurements from individual frames, whereas w3mpro is computed by fitting all W3 frames simultaneously and incorporating a robust error model. This column is "null" if w3m=0, the mean flux is negative or if no individual frame measurements are possible. CAUTION: This is not a robust measurement of source brightness. It is provided as an internal repeatability diagnostic only. Users should always defer to w3mpro for the optimal flux measurement for point sources.
w3sigp1	float	8	mag	Standard deviation of the population of W3 fluxes measured on the w3m individual frames covering this source, in magnitudes. This provides a measure of the characteristic uncertainty of the measurement of this source on individual frames. This column is "null" if w3m<2 or if no individual frame measurements are possible.
w3sigp2	float	8	mag	Standard deviation of the mean of the distribution of W3 fluxes (w3magp) computed from profile-fit measurements on the w3m individual frames covering this source, in magnitudes. This is equivalent to w3sigp1/sqrt(w3m). This column is "null" if w3m<2 or if no individual frame measurements are possible.
w3k	float	8		Stetson K variability index (Stetson, P. 1996, PASP, 108, 851) computed using the W3 profile-fit fluxes measured on the individual single-exposure images. This column is null if there are <3 single-exposure measurements available in W3.
w3ndf	int	4		Number of degrees of freedom in the flux variability chi-square, W3.
w3mlq	float	8		Probability measure that the source is variable in W3 flux. The value is -ln(Q), where Q = 1 - P(χ2). P is the cumulative chi-square distribution probability for the flux sample measured on the individual single-exposure images. The value is clipped at 9.
w3mjdmin	float	8		The earliest modified Julian Date (mJD) of the W3 single-exposures covering the source.
w3mjdmax	float	8		The latest modified Julian Date (mJD) of the W3 single-exposures covering the source.
w3mjdmean	float	8		The average modified Julian Date (mJD) of the W3 single-exposures covering the source.
w4magp	float	8	mag	Magnitude computed from the inverse-variance-weighted mean of the profile-fit flux measurements on the w4m individual W4 frames covering this source. This differs from w4mpro in that it is computed by combining the profile-fit measurements from individual frames, whereas w4mpro is computed by fitting all W4 frames simultaneously and incorporating a robust error model. This column is "null" if w4m=0, the mean flux is negative or if no individual frame measurements are possible. CAUTION: This is not a robust measurement of source brightness. It is provided as an internal repeatability diagnostic only. Users should always defer to w4mpro for the optimal flux measurement for point sources.
w4sigp1	float	8	mag	Standard deviation of the population of W4 fluxes measured on the w4m individual frames covering this source, in magnitudes. This provides a measure of the characteristic uncertainty of the measurement of this source on individual frames. This column is "null" if w4m<2 or if no individual frame measurements are possible.
w4sigp2	float	8	mag	Standard deviation of the mean of the distribution of W4 fluxes (w4magp) computed from profile-fit measurements on the w4m individual frames covering this source, in magnitudes. This is equivalent to w4sigp1/sqrt(w4m). This column is "null" if w4m<2 or if no individual frame measurements are possible.
w4k	float	8		Stetson K variability index (Stetson, P. 1996, PASP, 108, 851) computed using the W4 profile-fit fluxes measured on the individual single-exposure images. This column is null if there are <3 single-exposure measurements available in W4.
w4ndf	int	4		Number of degrees of freedom in the flux variability chi-square, W4.
w4mlq	float	8		Probability measure that the source is variable in W4 flux. The value is -ln(Q), where Q = 1 - P(χ2). P is the cumulative chi-square distribution probability for the flux sample measured on the individual single-exposure images. The value is clipped at 9.
w4mjdmin	float	8		The earliest modified Julian Date (mJD) of the W4 single-exposures covering the source.
w4mjdmax	float	8		The latest modified Julian Date (mJD) of the W4 single-exposures covering the source.
w4mjdmean	float	8		The average modified Julian Date (mJD) of the W4 single-exposures covering the source.
rho12	int	4	percent	The correlation coefficient between the W1 and W2 single-exposure flux measurements. The value is a signed 2-digit integer, expressed as a percentage. Negative values indicate anticorrelation. rho12 is approximately equal to 100 times the J variability index of Stetson (1996 PASP, 108, 851) computed for W1 and W2.
rho23	int	4	percent	The correlation coefficient between the W2 and W3 single-exposure flux measurements. The value is a signed 2-digit integer, expressed as a percentage. Negative values indicate anticorrelation. rho23 is approximately equal to 100 times the J variability index of Stetson (1996 PASP, 108, 851) computed for W2 and W3.
rho34	int	4	percent	The correlation coefficient between the W3 and W4 single-exposure flux measurements. The value is a signed 2-digit integer, expressed as a percentage. Negative values indicate anticorrelation. rho34 is approximately equal to 100 times the J variability index of Stetson (1996 PASP, 108, 851) computed for W3 and W4.
q12	int	4		Correlation significance between W1 and W2. The value is -log10(Q2(rho12)), where Q2 is the two-tailed fraction of all cases expected to show at least this much apparent positive or negative correlation when in fact there is no correlation. The value is clipped at 9.
q23	int	4		Correlation significance between W2 and W3. The value is -log10(Q2(rho23)), where Q2 is the two-tailed fraction of all cases expected to show at least this much apparent positive or negative correlation when in fact there is no correlation. The value is clipped at 9.
q34	int	4		Correlation significance between W3 and W4. The value is -log10(Q2(rho34)), where Q2 is the two-tailed fraction of all cases expected to show at least this much apparent positive or negative correlation when in fact there is no correlation. The value is clipped at 9.
xscprox	float	8	arcsec	2MASS Extended Source Catalog (XSC) proximity. This column gives the distance between the WISE source position and the position of a nearby 2MASS XSC source, if the separation is less than 1.1 times the Ks isophotal radius size of the XSC source. This identifies WISE sources that are identically the 2MASS XSC source as well as WISE sources that are fragments of large galaxies. This column is "null" if there is no 2MASS XSC source in proximity to the WISE source. If xscprox<2" and is not "null", the WISE source is assumed to be the galaxy detected by 2MASS. The WISE source is measured using an elliptical aperture with a size, shape and orientation that is scaled from that of the 2MASS XSC source. The elliptical aperture parameters and photometry are given in the w?rsemi, w?pa, w?ba, w?gmag and w?gerr columns.
w1rsemi	float	8	arcsec	Semi-major axis of the elliptical aperture used to measure source in W1.
w1ba	float	8	arcsec	Axis ratio (b/a) of the elliptical aperture used to measure source in W1.
w1pa	float	8	deg	Position angle (degrees E of N) of the elliptical aperture major axis used to measure source in W1.
w1gmag	float	8	mag	W1 magnitude of source measured in the elliptical aperture described by w1rsemi, w1ba, and w1pa.
w1gerr	float	8	mag	Uncertainty in the W1 magnitude of source measured in elliptical aperture. CAUTION: A w1gerr value of 9.999 indicates that the measurement uncertainty is very large, or the uncertainty could not be computed. In either case, the w1gmag measurement should be considered highly suspect.
w1gflg	int	4		W1 elliptical aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w2rsemi	float	8	arcsec	Semi-major axis of the elliptical aperture used to measure source in W2.
w2ba	float	8	arcsec	Axis ratio (b/a) of the elliptical aperture used to measure source in W2.
w2pa	float	8	deg	Position angle (degrees E of N) of the elliptical aperture major axis used to measure source in W2.
w2gmag	float	8	mag	W2 magnitude of source measured in the elliptical aperture described by w2rsemi, w2ba, and w2pa.
w2gerr	float	8	mag	Uncertainty in the W2 magnitude of source measured in elliptical aperture. CAUTION: A w2gerr value of 9.999 indicates that the measurement uncertainty is very large, or the uncertainty could not be computed. In either case, the w2gmag measurement should be considered highly suspect.
w2gflg	int	4		W2 elliptical aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w3rsemi	float	8	arcsec	Semi-major axis of the elliptical aperture used to measure source in W3.
w3ba	float	8	arcsec	Axis ratio (b/a) of the elliptical aperture used to measure source in W3.
w3pa	float	8	deg	Position angle (degrees E of N) of the elliptical aperture major axis used to measure source in W3.
w3gmag	float	8	mag	W3 magnitude of source measured in the elliptical aperture described by w3rsemi, w3ba, and w3pa.
w3gerr	float	8	mag	Uncertainty in the W3 magnitude of source measured in elliptical aperture. CAUTION: A w3gerr value of 9.999 indicates that the measurement uncertainty is very large, or the uncertainty could not be computed. In either case, the w3gmag measurement should be considered highly suspect.
w3gflg	int	4		W3 elliptical aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
w4rsemi	float	8	arcsec	Semi-major axis of the elliptical aperture used to measure source in W4.
w4ba	float	8	arcsec	Axis ratio (b/a) of the elliptical aperture used to measure source in W4.
w4pa	float	8	deg	Position angle (degrees E of N) of the elliptical aperture major axis used to measure source in W4.
w4gmag	float	8	mag	W4 magnitude of source measured in the elliptical aperture described by w4rsemi, w4ba, and w4pa.
w4gerr	float	8	mag	Uncertainty in the W4 magnitude of source measured in elliptical aperture. CAUTION: A w4gerr value of 9.999 indicates that the measurement uncertainty is very large, or the uncertainty could not be computed. In either case, the w4gmag measurement should be considered highly suspect.
w4gflg	int	4		W4 elliptical aperture measurement quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit.
tmass_key	int	4		2MASS PSC association. Unique identifier of the closest source in the 2MASS Point Source Catalog (PSC) that falls within 3" of the non-motion fit position of this WISE source. This is equivalent to the pts_key in the 2MASS PSC entry. This column is "null" if there is no 2MASS PSC source within 3" of the WISE source position. The number of 2MASS PSC sources within 3" of the WISE position is given in n_2mass. CAUTION - 2MASS source information included in the WISE source record is an association not an identification. Although the position accuracies of the two Catalogs are good, there is a non-zero probability of chance associations between physically unrelated objects, as well as missed associations between the Catalogs. You should always confirm associations by reviewing the entries from both Catalogs.
r_2mass	float	8	arcsec	Distance separating the positions of the WISE source and associated 2MASS PSC source within 3". This column is "null" if there is no associated 2MASS PSC source.
pa_2mass	float	8	deg	Position angle (degrees E of N) of the vector from the WISE source to the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source.
n_2mass	int	4		The number of 2MASS PSC entries found within a 3" radius of the WISE source position. If more than one 2MASS PSC falls within 3" of the WISE position, the closest 2MASS PSC entry is listed. This column is zero if there is no associated 2MASS PSC source.
j_m_2mass	float	8	mag	2MASS J-band magnitude or magnitude upper limit of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC J-band magnitude entry is "null".
j_msig_2mass	float	8	mag	2MASS J-band corrected photometric uncertainty of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC J-band uncertainty entry is "null".
h_m_2mass	float	8	mag	2MASS H-band magnitude or magnitude upper limit of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC H-band magnitude entry is "null".
h_msig_2mass	float	8	mag	2MASS H-band corrected photometric uncertainty of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC H-band uncertainty entry is "null".
k_m_2mass	float	8	mag	2MASS Ks-band magnitude of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC Ks-band magnitude entry is "null".
k_msig_2mass	float	8	mag	2MASS Ks-band corrected photometric uncertainty of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC Ks-band uncertainty entry is "null".
x	float	8		Unit sphere position x value
y	float	8		Unit sphere position y value
z	float	8		Unit sphere position z value
spt_ind	int	4		Level 7 HTM spatial index key
htm20	bigint	8		Level 20 HTM spatial index key
Total length		2028