RASSAEQSO ivo://nasa.heasarc/rassaeqso NASA/GSFC HEASARC Grazian et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains some of the first results of a survey for bright quasars (V < 14.5 and R < 15.4) covering the northern hemisphere at Galactic latitudes |b| > 30 degrees. The photometric database is derived from the Guide Star and USNO catalogs. Quasars are identified on the basis of their X-ray emission measured in the ROSAT All-Sky Survey (RASS). The surface density of quasars brighter than 15.5 magnitudes turns out to be (10 +/- 2) x 10<sup>-3</sup> degrees<sup>-2</sup>, about 3 times higher than that estimated by the Palomar-Green (PG) survey. In the paper, the quasar optical luminosity function (LF) at 0.04 < z <= 0.3 is computed and shown to be consistent with a luminosity-dependent luminosity evolution of the type derived by La Franca & Cristiani (1997AJ....113.1517L) in the range 0.3 < z <=2.2. The predictions of semianalytical models of hierarchical structure formation agree remarkably well with the present observations. This table was created by the HEASARC in September 2010 based on the combination of the electronic versions of Tables 2, 3, and 4 from the reference paper which were obtained from the CDS (their catalog J/AJ/119/2540). This is a service provided by NASA HEASARC . 2000AJ....119.2540G https://heasarc.gsfc.nasa.gov/W3Browse/all/rassaeqso.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=rassaeqso& GET text/xml 180 99999 true 19.265 0.0075 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=rassaeqso GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_rassaeqso&Action=More+Options&Action=Parameter+Search&ConeAdd=1 ROSAT 0.0333333333333333 X-ray public rassaeqso ROSAT All-Sky Survey/ASIAGO-ESO QSO Survey Catalog name Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable bj_mag B_j Magnitude mag phot.mag;em.opt.B double nullable vmag GSC V Magnitude mag phot.mag;em.opt.V double nullable rmag USNO R Magnitude mag phot.mag;em.opt.R double nullable redshift Redshift src.redshift double nullable redshift_flag Flag Indicates Uncertainty in Redshift meta.code;src.redshift char nullable broad_type Type of Source src.class char nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable lii Galactic Longitude degree pos.galactic.lon double nullable class Browse Object Classification src.class short nullable source_sample Field Indicates Published Table(s)/Sample(s) from Which the Entry Originates meta.ref;meta.table char nullable bii Galactic Latitude degree pos.galactic.lat double nullable