Einstein/OGal ivo://nasa.heasarc/einopslgal NASA/GSFC HEASARC Burstein et al. 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Galaxy The Einstein Survey of Optically Selected Galaxies contains the results of a complete Einstein Imaging Proportional Counter (IPC) X-ray survey of optically-selected galaxies from the Shapley-Ames (S-A) Catalog (CDS Catalog <VII/112>), the Uppsala General Catalog (UGC, <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VII/26">CDS Catalog <VII/26></a>) and the European Southern Observatory (ESO) Catalog (<a href="https://cdsarc.cds.unistra.fr/ftp/cats/VII/115">CDS Catalog <VII/115></a>). Well-defined optical criteria were used to select the galaxies, and X-ray fluxes were measured at the optically-defined positions. The result is a comprehensive list of X-ray detection and upper limit measurements for 1018 galaxies. Of these, 827 galaxies have either independent distance estimates or radial velocities. Associated optical, redshift, and distance data have been assembled for these galaxies, and their distances come from a combination of directly predicted distances and those predicted from the Faber-Burstein Great Attractor/Virgocentric infall model. The accuracy of the X-ray fluxes has been checked in three different ways; all are consistent with the derived X-ray fluxes being of <= 0.1 dex accuracy. In particular, there is agreement with previously published X-ray fluxes for galaxies in common with a 1991 study by Roberts et al. (1991ApJS...75..751R) and a 1992 study by Fabbiano et al. (1992ApJS...80..531F, also available at the HEASARC as a database table called EINGALCAT). This database was created at the HEASARC in May 2002 based on the ADC/<a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/111/163">CDS Catalog J/ApJS/111/163</a> and is derived from Tables 5, 6, 7, 12, 13, and 14 of the published paper. This is a service provided by NASA HEASARC . 1997ApJS..111..163B https://heasarc.gsfc.nasa.gov/W3Browse/all/einopslgal.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=einopslgal& GET text/xml 180 99999 true 99.85316093 -75.11523855 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=einopslgal GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_einopslgal&Action=More+Options&Action=Parameter+Search&ConeAdd=1 EINSTEIN 0.0333333333333333 X-ray public einopslgal Einstein Survey of Optically Selected Galaxies aperture_code Code for X-Ray Aperture Size short nullable log_d Log of Diameter in B Band (in arcmin) log(arcmin) double nullable "__y_ra_dec" System unit vector column double nullable count_rate X-Ray Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable dec Declination degree pos.eq.dec;meta.main double nullable "__z_ra_dec" System unit vector column double nullable conversion_factor Conversion Factor to Flux double nullable count_rate_error Error in X-Ray Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable ref_distance Code for Distance Reference short nullable t_type Morphological Type Code short nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable "__x_ra_dec" System unit vector column double nullable radial_velocity Heliocentric Radial Velocity (km/s) km/s spect.dopplerVeloc int nullable abs_bmag Absolute Blue Magnitude mag double nullable vignet_correction Vignetting Correction to X-Ray Count Rate double nullable class Browse Object Classification src.class short nullable "__row" System index column char nullable sequence_number IPC Field Number (-1 if more than one) int nullable "distance" Distance (Mpc) Mpc pos.distance double nullable exposure Total Exposure Time for IPC Field(s) s time.duration;obs.exposure int nullable log_diameter Log of Metric Diameter (in kpc) log(kpc) double nullable seyfert_code Code for Seyfert Galaxy Classification short nullable log_lx Log of Absolute X-Ray Luminosity (in erg/s) log(erg/s) double nullable bmag B Magnitude mag phot.mag;em.opt.B double nullable bii Galactic Latitude degree pos.galactic.lat double nullable lii Galactic Longitude degree pos.galactic.lon double nullable name Source Designation meta.id;meta.main char nullable galaxy_sample Galaxy Sample (UGC, ESO, S-A) char nullable log_lx_limit Flag Indicates X-Ray Luminosity Upper Limit char nullable