Einstein/Gal ivo://nasa.heasarc/eingalcat NASA/GSFC HEASARC Fabbiano, Kim, Trinchieri 2026-07-24 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Galaxy This is a catalog of galaxies observed in the X-ray band with the Einstein Observatory imaging instruments, the Imaging Proportional Counter (IPC) and the High Resolution Imager (HRI). The catalog comprises 716 observations of 493 galaxies, including those that were targets of pointed observations, and galaxies from the Revised Shapley-Ames (RSA) Catalog of Bright Galaxies and the Second Revised Catalog (RC2) Catalog of Bright Galaxies that were serendipitously included in Einstein fields, plus X-ray data on 4 other galaxies (LMC, SMC, M 31 = NGC 224, and M 32 = NGC 221) taken from the literature, for a total of 720 entries. A total of 450 of these galaxies were imaged well within the instrumental fields, resulting in 238 detections and 212 3-sigma upper limits. The other galaxies were either at the edge of the visible field of view or were confused with other X-ray sources. This database was created by the HEASARC in January 2002 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/80/531">CDS Catalog J/ApJS/80/531</a>, tables gxatlas.dat and gxfluxes.dat. This is a service provided by NASA HEASARC . 1992ApJS...80..531F https://heasarc.gsfc.nasa.gov/W3Browse/all/eingalcat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=eingalcat& GET text/xml 180 99999 true 13.18675602 -72.82860173 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=eingalcat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_eingalcat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GALAXY CATALOG 0.0333333333333333 X-ray public eingalcat Catalog of Galaxies Observed by the Einstein Observatory IPC & H name Object Designation (NGC, IC, or UGC Number) 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 count_rate_limit Upper Limit Flag for Count Rate meta.code.error;phot.count;em.X-ray char nullable count_rate X-Ray Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable flux X-Ray Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray double nullable "distance" Distance (Mpc) Mpc pos.distance double nullable log_lx_limit Upper Limit Flag for Log of X-Ray Luminosity meta.code.error;phys.luminosity;em.X-ray char nullable log_lx Log of X-Ray Luminosity (erg/s) log(erg/s) phys.luminosity;em.X-ray double nullable sequence_number Observation Sequence Number meta.id;obs int nullable t_type Morphological RC2 T-type src.morph.type int nullable "time" Date of Start of Observation mjd time.start;obs int nullable nh Foreground H I Column Density H-atoms/cm^2 phys.columnDensity double nullable instrument Instrument Used (IPC or HRI) char nullable lii Galactic Longitude degree pos.galactic.lon double nullable off_axis Offset from Field Center (arcmin) arcmin instr.offset double nullable counts Total Background-Subtracted X-Ray Counts ct phot.count;em.X-ray double nullable note_flag Flag Indicates Note in Documentation about Object meta.code char nullable "year" Year of Start of Observation yr time.start;obs short nullable live_time Length of Observation (secs) s time.duration;obs.exposure double nullable counts_limit Upper Limit Flag for Counts meta.code.error;phot.count;em.X-ray char nullable bmag Apparent B-band Magnitude mag phot.mag;em.opt.B double nullable type_flag Flag Indicates Type of Object (AGN or VIR=Virgo Cluster) meta.code char nullable flux_limit Upper Limit Flag for X-Ray Flux meta.code.error;phot.flux;em.X-ray char nullable dec1950_xray Declination (B1950) of the X-Ray Source pos.eq.dec char nullable doy Day of the Year of Start of Observation d time.start;obs short nullable ra1950_xray Right Ascension (B1950) of the X-Ray Source pos.eq.ra char nullable counts_error 1-Sigma Error in Counts ct meta.code.error;phot.count;em.X-ray double nullable extract_radius X-Ray Extraction Radius (arcsec) arcsec short nullable merge_flag Flag Indicates X-Ray Info from Merged Entries char nullable bii Galactic Latitude degree pos.galactic.lat double 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