Contains the parameters provided for each source in the FIRST Survey Catalog: 03Apr11 Version. 
This table contains brief descriptions of the parameters provided for each source in the FIRST SC. It contains 811,117 sources arranged in order of increasing right ascension. Required constraints:

Name  Type  Length  Unit  Description  Default Value  Unified Content Descriptor 

fieldName  varchar  12  Name of the coadded image containing the source (encodes the position of the field center).  obs.image  
seqNo  int  4  sequential object number  meta.id  
cx  float  8  unit vector of spherical coordinates  pos.distance;pos.cartesian.x  
cy  float  8  unit vector of spherical coordinates  pos.distance;pos.cartesian.y  
cz  float  8  unit vector of spherical coordinates  pos.distance;pos.cartesian.z  
htmID  bigint  8  Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial coordinates  pos.eq  
ra  float  8  degrees  J2000 Celestial Right Ascension  pos.eq.ra;meta.main  
dec  float  8  degrees  J2000 Celestial Declination  pos.eq.dec;meta.main  
warnFlag  varchar  1  Warning flag indicating that the source may be a sidelobe of a nearby bright source.  meta.code  
fPeak  real  4  mJy  peak flux densities  phot.flux.density;em.radio.7501500MHz  
fInt  real  4  mJy  integrated flux densities  phot.flux.density;em.radio.7501500MHz  
rms  real  4  mJy  local noise estimate at the source position  instr.det.noise  
maj  real  4  arcsec  major axes derived from the elliptical Gaussian model for the source after deconvolution.  phys.angSize.smajAxis  
min  real  4  arcsec  minor axes derived from the elliptical Gaussian model for the source after deconvolution.  phys.angSize.sminAxis  
pa  real  4  degrees  position angle (east of north) derived from the elliptical Gaussian model for the source  pos.posAng  
fMaj  real  4  arcsec  major axes derived from the elliptical Gaussian model for the source before deconvolution.  phys.angSize.smajAxis  
fMin  real  4  arcsec  minor axes derived from the elliptical Gaussian model for the source before deconvolution.  phys.angSize.sminAxis  
fPA  real  4  degrees  position angle (east of north) derived from the elliptical Gaussian model for the source before deconvolution.  pos.posAng  
Total length  101 