TABLE  DR3QuasarCatalog

The catalog of all confirmed quasars in SDSS Data Release 3.
NOTE: The DRxQuasarCatalog a derived science table that may not be loaded for every release or available at the time the release is published.

This is a table containing all the quasars identified in the SDSS DR3 data. The paper describing the contents of this table is usually found in the Expert Background page of the SkyServer SDSS section (Schneider et al. 2005).

nametypelengthunitucddescription
SDSSNamevarchar64  SDSS Object Name, hhmmss.ss+ddmmss.s (J2000; truncated coordinates), see http://www.sdss.org/DR3/coverage/IAU.html
RAfloat8deg J2000 R.A.
decfloat8deg J2000 declination
zreal4  Redshift
psfmag_ureal4mag PSF-fitting magnitude in each band from
psfmagerr_ureal4mag "BEST" version of data (latest photometry
psfmag_greal4mag and final target selection version).
psfmagerr_greal4mag asinhmag: Lupton,Gunn & Szalay 1999, AJ, 118, 1406
psfmag_rreal4mag SDSS photometry is close to AB in g,r,i (to 0.01 mag)
psfmagerr_rreal4mag u_AB = u_SDSS - 0.04; z_AB = z_SDSS + 0.02
psfmag_ireal4mag (with some uncertainty about the true z shift)
psfmagerr_ireal4mag AB: Oke and Gunn 1983, ApJ, 266, 713,
psfmag_zreal4mag see Flux Calibration in Algorithms Help page.
psfmagerr_zreal4mag  
A_ureal4mag Galactic absorption in u band, A_g/A_r/A_i/A_z = 0.736/0.534/0.405/0.287 * A_u
lgNHreal4   
FIRSTmagreal4  FIRST Peak flux density (AB mag) at 20 cm of FIRST catalog match within 2 arcsec, AB mag = -2.5 log_10(f_nu / 3631 Jy); 0 ==> no detection, -1 ==> not in FIRST survey area
FIRST_snreal4   
FIRST_sepreal4   
FIRST_flux_at_optsmallint2  1 ==> no FIRST source within 2 arcsec, but > 3 sigma FIRST flux detection at optical position
FIRST_extmatchsmallint2  For source with either FIRSTMAG > 0 or FIRST_flux_at_opt 1 ==> FIRST catalog source within 2 arcsec - 30 arcsec
lg_RASS_ratereal4  log_10 BSC/FSC full band count rate; 0 ==> no detection ROSAT All Sky Survey Bright and Faint source catalogs
RASS_snreal4   
RASS_sepreal4   
TWOMASSmag_Jreal4  2MASS All-Sky Point Source Catalog 2003 March 25; Note that 2MASS magnitues are Vega-based, not AB
TWOMASSmagerr_Jreal4   
TWOMASSmag_Hreal4   
TWOMASSmagerr_Hreal4   
TWOMASSmag_Kreal4   
TWOMASSmagerr_Kreal4   
TWOMASS_sepreal4   
M_ireal4  Uses Ho=70 Omega_M=0.300 Omega_L= 0.700 alpha_Q=-0.50
morphologysmallint2  0 = point source 1 = extended
scienceprimarysmallint2  Used by CAS to resolve repeat spectra (if available) of a given object. 0 only in special cases.
modesmallint2  1 for primary object, 2 for secondary, 3 for family
bestprimtargetint4  Target selection flags in "BEST" version of data
ts_b_qsosmallint2  Individual flags expanded from bestprimtarget
ts_b_hizsmallint2   
ts_b_FIRSTsmallint2   
ts_b_ROSATsmallint2   
ts_b_serendipsmallint2   
ts_b_starsmallint2   
ts_b_galsmallint2   
run_bestsmallint2  SDSS Imaging run number for "BEST" data
mjd_bestint4  Modified Julian Date of BEST imaging observation
mjd_specint4  Modified Julian Date of spectroscopic observation
platesmallint2   
fiberidsmallint2   
rerun_bestsmallint2  SDSS Imaging rerun, camcol, field, object number
camcol_bestsmallint2   
field_bestsmallint2   
obj_bestsmallint2   
tilingchunksmallint2  Tiling chunk number
targprimtargetint4  Target selection flags in "TARGET" version of data
t_psfmag_ureal4  PSF magnitudes and errors in "TARGET" version of data
t_psfmagerr_ureal4   
t_psfmag_greal4   
t_psfmagerr_greal4   
t_psfmag_rreal4   
t_psfmagerr_rreal4   
t_psfmag_ireal4   
t_psfmagerr_ireal4   
t_psfmag_zreal4   
t_psfmagerr_zreal4   
object_namevarchar64  Object Name if previously published; "SDSS" if previously published SDSS discovery
specObjIdbigint8  Unique SDSS ID of corresponding object in SpecObjAll table