TABLE  DR5QuasarCatalog

This is a table containing all the quasars identified in the SDSS DR5 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. 2007, AJ submitted).

name	type	length	unit	ucd	description
specObjId	bigint	8			Unique SDSS ID of corresponding object in SpecObjAll table
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	real	4	mag		Galactic absorption in g band
A_r	real	4	mag		Galactic absorption in r band
A_i	real	4	mag		Galactic absorption in i band
A_z	real	4	mag		Galactic absorption in z band
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	int	4			1 ==> no FIRST source within 2 arcsec, but > 3 sigma FIRST flux detection at optical position
FIRST_extmatch	int	4			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
delgi	real	4
morphology	int	4			0 = point source 1 = extended
scienceprimary	int	4			Used by CAS to resolve repeat spectra (if available) of a given object. 0 only in special cases.
mode	int	4			1 for primary object, 2 for secondary, 3 for family
uniform	int	4
bestprimtarget	int	4			Target selection flags in "BEST" version of data
ts_b_lowz	int	4			Individual flags expanded from bestprimtarget
ts_b_hiz	int	4
ts_b_FIRST	int	4
ts_b_ROSAT	int	4
ts_b_serendip	int	4
ts_b_star	int	4
ts_b_gal	int	4
run_best	int	4			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	int	4
fiberid	int	4
rerun_best	int	4			SDSS Imaging rerun, camcol, field, object number
camcol_best	int	4
field_best	int	4
obj_best	int	4
targprimtarget	int	4			Target selection flags in "TARGET" version of data
ts_t_lowz	int	4			Individual flags expanded from targprimtarget
ts_t_hiz	int	4
ts_t_first	int	4
ts_t_rosat	int	4
ts_t_serendip	int	4
ts_t_star	int	4
ts_t_gal	int	4
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