J/ApJS/80/531 J/ApJS/80/531 An X-ray catalog and atlas of galaxies. G Fabbiano D -W Kim G Trinchieri Astrophys. J. Suppl. Ser. 80 531 1992 1992ApJS...80..531F Galaxy catalogs X-ray sources atlases catalogs Galaxy: structure X-rays: galaxies An X-ray catalog and atlas of galaxies observed with the Einstein Observatory imaging instruments (IPC and HRI) are presented. The catalog comprises 493 galaxies, including targets of pointed observations, and RSA or RC2 galaxies serendipitously included in Einstein fields. A total of 450 of these galaxies were imaged well within the instrumental fields, resulting in 238 detections and 2123 sigma upper limits. The other galaxies were either at the edge of the visible field of view or confused with other X-ray sources. For these a rough measure of their X-ray emission is also given. The atlas shows X-ray contour maps of detected galaxies superposed on optical photographs and gives azimuthally averaged surface brightness profiles of galaxies detected with a high signal-to-noise ratio.

Einstein

Name Name of the object (NGC, IC, UGC number) --- note Note: 'a' if AGN or 'b' if Virgo --- RAh Right Ascension (B1950) (hour) h RAm Right Ascension (B1950) (min) min RAs Right Ascension (B1950) (sec) s DE- Declination sign (B1950) --- DEd Declination (B1950) (deg) deg DEm Declination (B1950) (arcmin) arcmin DEs Declination (B1950) (arcsec) arcsec nH Foreground column of HI number=1 This column contains the Galactic column density of HI in the direction of the galaxy in question, in units of 10^20^ cm^-2^. The information is accurate to two significant digits. 10+20cm-2 inst Instrument used number=2 instrument flag (I for IPC, and H for HRI), and the sequence number of the observation. --- Seqno Observation sequence number --- obs.Y Year of start of observation minus 1900 yr obs.D Day of start of observation d livetime Time of observation number=3 This column contains the total livetime of the observing sequence in seconds, quoted to one decimal place. s offaxis Distance to field center number=4 This column gives the angular separation between the center of the field for the observing sequence and the optical position of the galaxy. It is given in arcminutes, to an accuracy of 0.1 arcminute. arcmin Name Name of the object (NGC, IC, UGC number) --- note Flag indicating ending note number=1 This column gives a flag if there is a note on the source. The following are used: `a' if the galaxy has an AGN `b' if it is a Virgo cluster member `c' X-ray data are from the following: LMC and SMC: Long and van Speybroeck (1983) in "Accretion Driven X-Ray Sources" Lewin and van den Heuvel eds. (Cambridge: Cambridge U. Press) p. 117. M31 and M32: Trinchieri and Fabbiano (1991ApJ...382...82T) M33: Trinchieri et al. (1988ApJ...325..531T) M101: Trinchieri et al. (1990ApJ...356..110T) `d' no morphological type available (peculiar galaxy) `e' combined flux of two sources (see table 7 of published paper) --- RAh Right Ascension (B1950) (hour) h RAm Right Ascension (B1950) (min) min RAs Right Ascension (B1950) (sec) s DE- Declination sign (B1950) --- DEd Declination (B1950) (deg) deg DEm Declination (B1950) (arcmin) arcmin DEs Declination (B1950) (arcsec) arcsec instr Instrument used number=2 I for IPC, and H for HRI --- seqno Observation sequence number number=3 A sequence number of 99999 indicates that there is more than one observation of the source. See the gxatlas.dat table for details on the observations. --- Bmag Apparent B magnitude number=4 This column gives the B-band apparent magnitude from the RSA, RC2 or PCG (Patural's Principal Catalog of Galaxies). (Cat. <VII/119>) mag type T-type following RC2 number=5 This column gives the T-type, as defined in the RC2 (Cat. <VII/112>), using morphological information from the RSA, RC2, or PCG. --- RA_Xh Right Ascension (B1950) (hour) number=6 These columns give the B1950 right ascension and declination of the X-ray centroids of those objects detected by EINSTEIN. h RA_Xm Right Ascension (B1950) (min) min RA_Xs Right Ascension (B1950) (sec) s DE_X- Declination sign (B1950) number=6 These columns give the B1950 right ascension and declination of the X-ray centroids of those objects detected by EINSTEIN. --- DE_Xd Declination (B1950) (deg) deg DE_Xm Declination (B1950) (arcmin) arcmin DE_Xs Declination (B1950) (arcsec) arcsec radius Size of aperture for flux extraction arcsec l_counts Flagged '<' if counts is an upper limit number=7 These columns give the total (background-subtracted) X-ray counts or upper limits for all galaxies in the catalog. The error in the counts (1-sigma) is also given for all detected galaxies. A "<" in the l_counts column indicates an upper limit. No error is given for upper limits. --- counts Total counts from EINSTEIN observation number=7 These columns give the total (background-subtracted) X-ray counts or upper limits for all galaxies in the catalog. The error in the counts (1-sigma) is also given for all detected galaxies. A "<" in the l_counts column indicates an upper limit. No error is given for upper limits. ct e_counts Error on count total number=7 These columns give the total (background-subtracted) X-ray counts or upper limits for all galaxies in the catalog. The error in the counts (1-sigma) is also given for all detected galaxies. A "<" in the l_counts column indicates an upper limit. No error is given for upper limits. ct l_crate '<' if count rate is upper limit number=8 The crate column gives the EINSTEIN X-ray count-rate per 1000 seconds. The l_crate column is flagged with a "<" if the count-rate is an upper limit. --- crate Count-rate from EINSTEIN observation number=8 The crate column gives the EINSTEIN X-ray count-rate per 1000 seconds. The l_crate column is flagged with a "<" if the count-rate is an upper limit. ct/ks l_FluxX '<' if flux is an upper limit number=9 The FluxX column gives the EINSTEIN X-ray flux in units of 10E-13 erg/sec/cm2. The l_FluxX column is flagged with a "<" if FluxX is an upper limit. --- FluxX X-ray flux number=9 The FluxX column gives the EINSTEIN X-ray flux in units of 10E-13 erg/sec/cm2. The l_FluxX column is flagged with a "<" if FluxX is an upper limit. 10-16W/m2 dist Assumed distance in Megaparsecs number=10 This column gives the assumed distance in Mpc for all galaxies in the catalog, derived assuming a Hubble constant of 50 km/s/Mpc corrected for Virgocentric inflow. Mpc l_logLx '<' if luminosity is upper limit number=11 The logLx column gives the log of the derived X-ray luminosity (or upper-limit thereof) for all galaxies in the catalog, using the distances given in the distance column. Units are log(ergs/sec). The l_logLx column is flagged with a "<" if logLx is an upper limit. --- logLx Log of the X-ray luminosity number=11 The logLx column gives the log of the derived X-ray luminosity (or upper-limit thereof) for all galaxies in the catalog, using the distances given in the distance column. Units are log(ergs/sec). The l_logLx column is flagged with a "<" if logLx is an upper limit. [10-7W] Patricio Ortiz CDS 1999Apr06 UNKNOWN UNKNOWN Prepared from the tables available at the "ADS Catalogue Service" (CfA, Harvard-Smithsonian Center for Astrophysics, Cambrigde MA) J_ApJS_80_531.xml