HB ivo://nasa.heasarc/qso NASA/GSFC HEASARC Hewitt, Burbidge 2026-06-05 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov AGN This is (a somewhat condensed form of) the Hewitt & Burbidge (1993) Revised and Updated Catalog of Quasi-Stellar Objects, and contains all then-known (to 1992 December 31) quasi-stellar objects (QSOs) with measured emission redshifts and BL Lac objects. The catalog contains 7315 objects, nearly all of which are quasi-stellar objects, and 89 of which are BL Lac objects. It contains extensive information on names, positions, magnitudes, colors, emission-line redshifts, absorption-line systems, etc. The published version of this catalog (Hewitt & Burbidge 1993, ApJS, 87, 451) typically contained multiple rows on information for each object. This database basically has only the information given in the first row for every object, and is based on the CDS/ADC table VII/158 table1_1.dat.gz. This database was created by the HEASARC in February 2001 based on CDS/ADC Catalog VII/158 (table1_1.dat.gz). This is a service provided by NASA HEASARC . 1993ApJS...87..451H https://heasarc.gsfc.nasa.gov/W3Browse/all/qso.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=qso& GET text/xml 180 99999 true 0.65558333 -2.35330556 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=qso GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_qso&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GALAXY CATALOG 0.0833333333333333 Optical public qso Hewitt & Burbidge (1993) QSO Catalog name Catalog 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 app_mag Apparent Magnitude phot.mag;em.opt.V float nullable redshift Emission Redshift src.redshift float nullable bv_color B-V Color phot.color;em.opt.B;em.opt.V float nullable var_flag Variability Flag [V] meta.code;src.var char nullable selected_flag Selection Techniques Flag [RXSVCO+] meta.code char nullable class Browse Object Classification src.class short nullable element Emission Line on Which Redshift Is Based phys.atmol.element char nullable abs_redshift Absorption Redshift src.redshift double nullable ref_redshift Reference Code for Emission Redshift meta.ref;src.redshift short nullable lii Galactic Longitude degree pos.galactic.lon float nullable bii Galactic Latitude degree pos.galactic.lat float nullable lbqs_flag Flag Indicates Quasar in LBQS meta.code char nullable redshift_flag Redshift Uncertainty Flag [:] meta.code;src.redshift char nullable alt_name Alternative Designation meta.id char nullable ub_color U-B Color phot.color;em.opt.U;em.opt.B float nullable notes Notes meta.note char nullable ref_id Reference Code for Identification meta.ref short nullable ref_radio Reference Code for Radio meta.ref short nullable wavelength_element Wavelength of Emission Element (Angstroms) Angstrom em.wl short nullable ref_var Reference Code for Variability meta.ref;src.var short nullable bllac_flag BL Lac Object Flag [B] src.class char nullable abs_redshift_flag Absorption Redshift Flag [Y+] meta.ref;src.redshift char nullable ref_abs_redshift Reference Code for Absorption Redshift meta.ref;src.redshift short 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