TABLE  first08Jul16Source

Contains the parameters provided for each source in the FIRST Survey Catalog: 08Jul16 Version.

This table contains brief descriptions of the parameters provided for
each source in the FIRST SC. It contains 816,331 sources arranged in
order of increasing right ascension.

Required constraints:
  • Primary key is (seqNo)

NameTypeLengthUnitDescriptionDefault ValueUnified Content Descriptor
fieldNamevarchar12 Name of the coadded image containing the source (encodes the position of the field center). obs.image
seqNoint4 sequential object number meta.id
cxfloat8 unit vector of spherical co-ordinates pos.distance;pos.cartesian.x
cyfloat8 unit vector of spherical co-ordinates pos.distance;pos.cartesian.y
czfloat8 unit vector of spherical co-ordinates pos.distance;pos.cartesian.z
htmIDbigint8 Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates pos.eq
rafloat8degreesJ2000 Celestial Right Ascension pos.eq.ra;meta.main
decfloat8degreesJ2000 Celestial Declination pos.eq.dec;meta.main
sourceProbfloat8 probability that the source is spurious (most commonly because it is a sidelobe of of a nearby bright source.) Low values mean the source is unlikely to be spurious. meta.code
fPeakreal4mJypeak flux densities phot.flux.density;em.radio.750-1500MHz
fIntreal4mJyintegrated flux densities phot.flux.density;em.radio.750-1500MHz
rmsreal4mJylocal noise estimate at the source position instr.det.noise
majreal4arcsecmajor axes derived from the elliptical Gaussian model for the source after deconvolution. phys.angSize.smajAxis
minreal4arcsecminor axes derived from the elliptical Gaussian model for the source after deconvolution. phys.angSize.sminAxis
pareal4degreesposition angle (east of north) derived from the elliptical Gaussian model for the source pos.posAng
fMajreal4arcsecmajor axes derived from the elliptical Gaussian model for the source before deconvolution. phys.angSize.smajAxis
fMinreal4arcsecminor axes derived from the elliptical Gaussian model for the source before deconvolution. phys.angSize.sminAxis
fPAreal4degreesposition angle (east of north) derived from the elliptical Gaussian model for the source before deconvolution. pos.posAng
sdssMatchesint4 number of matches within a fiducial radius (8 arcsec) with SDSS DR6  
sdssSepreal4arcsecseparation of the nearest match in SDSS DR6 from the FIRST position  
sdssMagreal4magSDSS i magnitude  
sdssClassvarchar1 morphological classification in SDSS DR6 (s=stellar, g=nonstellar/galaxy)  
gsc2Matchesint4 number of matches within a fiducial radius (10 arcsec) with GSC-2 version 2.3.2  
gsc2Sepreal4arcsecseparation of the nearest match in GSC-2 version 2.3.2 from the FIRST position  
gsc2Magreal4magGSC2 F magnitude  
gsc2Classvarchar1 morphological classification in GSC-2 version 2.3.2 (s=stellar, g=nonstellar/galaxy)  
twomassMatchesint4 number of matches within a fiducial radius (8 arcsec) with 2MASS  
twomassSepreal4arcsecseparation of the nearest match in 2MASS from the FIRST position  
twomassMagreal4mag2MASS K magnitude  
Total length146