TABLE  Detection

A slice in declination (-1 < dec < 3.6) of the full table held at MAST. Contains single epoch photometry of individual detections from a single exposure.

The identifiers connecting the detection back to the original image
and to the object association are provided. PSF, aperture, and Kron (1980)
photometry are included, along with sky and detector coordinate positions.

Required constraints:
  • Primary key is (objID,uniquePspsP2id)

NameTypeLengthUnitDescriptionDefault ValueUnified Content Descriptor
objIDbigint8 Unique object identifier.  
uniquePspsP2idbigint8 Unique internal PSPS detection identifier.  
detectIDbigint8 Unique detection identifier.  
ippObjIDbigint8 IPP internal object identifier.  
ippDetectIDbigint8 IPP internal detection identifier.  
filterIDtinyint1 Filter identifier. Details in the Filter table.  
surveyIDtinyint1 Survey identifier. Details in the Survey table.  
imageIDbigint8 Unique image identifier. Constructed as (100 * frameID + ccdID).  
randomDetIDfloat8 Random value drawn from the interval between zero and one.  
dvoRegionIDint4 Internal DVO region identifier.-1 
obsTimefloat8daysModified Julian Date at the midpoint of the observation.-999 
xPosreal4raw pixelsPSF x center location.-999 
yPosreal4raw pixelsPSF y center location.-999 
xPosErrreal4raw pixelsError in PSF x center location.-999 
yPosErrreal4raw pixelsError in PSF y center location.-999 
pltScalereal4arcsec/pixelLocal plate scale at this location.-999 
posAnglereal4degreesPosition angle (sky-to-chip) at this location.-999 
rafloat8degreesRight ascension.-999 
decfloat8degreesDeclination.-999 
raErrreal4arcsecRight ascension error.-999 
decErrreal4arcsecDeclination error.-999 
extNSigmareal4 An extendedness measure based on the deviation between PSF and Kron (1980) magnitudes, normalized by the PSF magnitude uncertainty.0 
zpreal4magnitudesPhotometric zeropoint. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.0 
telluricExtreal4magnitudesEstimated Telluric extinction due to non-photometric observing conditions. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.  
expTimereal4secondsExposure time of the frame/exposure. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.-999 
airMassreal4 Airmass at midpoint of the exposure. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.0 
psfFluxreal4JanskysFlux from PSF fit.-999 
psfFluxErrreal4JanskysError on flux from PSF fit.-999 
psfMajorFWHMreal4arcsecPSF major axis FWHM.-999 
psfMinorFWHMreal4arcsecPSF minor axis FWHM.-999 
psfThetareal4degreesPSF major axis orientation.-999 
psfCorereal4 PSF core parameter k, where F = F0 / (1 + k r^2 + r^3.33).-999 
psfQfreal4 PSF coverage factor.-999 
psfQfPerfectreal4 PSF weighted fraction of pixels totally unmasked.-999 
psfChiSqreal4 Reduced chi squared value of the PSF model fit.-999 
psfLikelihoodreal4 Likelihood that this detection is best fit by a PSF.-999 
momentXXreal4arcsec^2Second moment M_xx.-999 
momentXYreal4arcsec^2Second moment M_xy.-999 
momentYYreal4arcsec^2Second moment M_yy.-999 
momentR1real4arcsecFirst radial moment.-999 
momentRHreal4arcsec^0.5Half radial moment (r^0.5 weighting).-999 
momentM3Creal4arcsec^2Cosine of trefoil second moment term: r^2 cos(3 theta) = M_xxx - 3 * M_xyy.-999 
momentM3Sreal4arcsec^2Sine of trefoil second moment: r^2 sin (3 theta) = 3 * M_xxy - M_yyy.-999 
momentM4Creal4arcsec^2Cosine of quadrupole second moment: r^2 cos (4 theta) = M_xxxx - 6 * M_xxyy + M_yyyy.-999 
momentM4Sreal4arcsec^2Sine of quadrupole second moment: r^2 sin (4 theta) = 4 * M_xxxy - 4 * M_xyyy.-999 
apFluxreal4JanskysFlux in seeing-dependent aperture.-999 
apFluxErrreal4JanskysError on flux in seeing-dependent aperture.-999 
apFillFreal4 Aperture fill factor.-999 
apRadiusreal4arcsecAperture radius.-999 
kronFluxreal4JanskysKron (1980) flux.-999 
kronFluxErrreal4JanskysError on Kron (1980) flux.-999 
kronRadreal4arcsecKron (1980) radius.-999 
skyreal4Janskys/arcsec^2Background sky level.-999 
skyErrreal4Janskys/arcsec^2Error in background sky level.-999 
infoFlagbigint8 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags.0 
infoFlag2int4 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags2.0 
infoFlag3int4 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags3.0 
processingVersiontinyint1 Data release version.  
Total length267