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). |
name | type | length | unit | ucd | description |
SDSSName | varchar | 64 | SDSS Object Name, hhmmss.ss+ddmmss.s (J2000; truncated coordinates), see http://www.sdss.org/DR3/coverage/IAU.html | ||
RA | float | 8 | deg | J2000 R.A. | |
dec | float | 8 | deg | J2000 declination | |
z | real | 4 | Redshift | ||
psfmag_u | real | 4 | mag | PSF-fitting magnitude in each band from | |
psfmagerr_u | real | 4 | mag | "BEST" version of data (latest photometry | |
psfmag_g | real | 4 | mag | and final target selection version). | |
psfmagerr_g | real | 4 | mag | asinhmag: Lupton,Gunn & Szalay 1999, AJ, 118, 1406 | |
psfmag_r | real | 4 | mag | SDSS photometry is close to AB in g,r,i (to 0.01 mag) | |
psfmagerr_r | real | 4 | mag | u_AB = u_SDSS - 0.04; z_AB = z_SDSS + 0.02 | |
psfmag_i | real | 4 | mag | (with some uncertainty about the true z shift) | |
psfmagerr_i | real | 4 | mag | AB: Oke and Gunn 1983, ApJ, 266, 713, | |
psfmag_z | real | 4 | mag | see Flux Calibration in Algorithms Help page. | |
psfmagerr_z | real | 4 | mag | ||
A_u | real | 4 | mag | Galactic absorption in u band, A_g/A_r/A_i/A_z = 0.736/0.534/0.405/0.287 * A_u | |
lgNH | real | 4 | |||
FIRSTmag | real | 4 | 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_sn | real | 4 | |||
FIRST_sep | real | 4 | |||
FIRST_flux_at_opt | smallint | 2 | 1 ==> no FIRST source within 2 arcsec, but > 3 sigma FIRST flux detection at optical position | ||
FIRST_extmatch | smallint | 2 | For source with either FIRSTMAG > 0 or FIRST_flux_at_opt 1 ==> FIRST catalog source within 2 arcsec - 30 arcsec | ||
lg_RASS_rate | real | 4 | log_10 BSC/FSC full band count rate; 0 ==> no detection ROSAT All Sky Survey Bright and Faint source catalogs | ||
RASS_sn | real | 4 | |||
RASS_sep | real | 4 | |||
TWOMASSmag_J | real | 4 | 2MASS All-Sky Point Source Catalog 2003 March 25; Note that 2MASS magnitues are Vega-based, not AB | ||
TWOMASSmagerr_J | real | 4 | |||
TWOMASSmag_H | real | 4 | |||
TWOMASSmagerr_H | real | 4 | |||
TWOMASSmag_K | real | 4 | |||
TWOMASSmagerr_K | real | 4 | |||
TWOMASS_sep | real | 4 | |||
M_i | real | 4 | Uses Ho=70 Omega_M=0.300 Omega_L= 0.700 alpha_Q=-0.50 | ||
morphology | smallint | 2 | 0 = point source 1 = extended | ||
scienceprimary | smallint | 2 | Used by CAS to resolve repeat spectra (if available) of a given object. 0 only in special cases. | ||
mode | smallint | 2 | 1 for primary object, 2 for secondary, 3 for family | ||
bestprimtarget | int | 4 | Target selection flags in "BEST" version of data | ||
ts_b_qso | smallint | 2 | Individual flags expanded from bestprimtarget | ||
ts_b_hiz | smallint | 2 | |||
ts_b_FIRST | smallint | 2 | |||
ts_b_ROSAT | smallint | 2 | |||
ts_b_serendip | smallint | 2 | |||
ts_b_star | smallint | 2 | |||
ts_b_gal | smallint | 2 | |||
run_best | smallint | 2 | SDSS Imaging run number for "BEST" data | ||
mjd_best | int | 4 | Modified Julian Date of BEST imaging observation | ||
mjd_spec | int | 4 | Modified Julian Date of spectroscopic observation | ||
plate | smallint | 2 | |||
fiberid | smallint | 2 | |||
rerun_best | smallint | 2 | SDSS Imaging rerun, camcol, field, object number | ||
camcol_best | smallint | 2 | |||
field_best | smallint | 2 | |||
obj_best | smallint | 2 | |||
tilingchunk | smallint | 2 | Tiling chunk number | ||
targprimtarget | int | 4 | Target selection flags in "TARGET" version of data | ||
t_psfmag_u | real | 4 | PSF magnitudes and errors in "TARGET" version of data | ||
t_psfmagerr_u | real | 4 | |||
t_psfmag_g | real | 4 | |||
t_psfmagerr_g | real | 4 | |||
t_psfmag_r | real | 4 | |||
t_psfmagerr_r | real | 4 | |||
t_psfmag_i | real | 4 | |||
t_psfmagerr_i | real | 4 | |||
t_psfmag_z | real | 4 | |||
t_psfmagerr_z | real | 4 | |||
object_name | varchar | 64 | Object Name if previously published; "SDSS" if previously published SDSS discovery | ||
specObjId | bigint | 8 | Unique SDSS ID of corresponding object in SpecObjAll table |