J/ApJS/80/531 An X-ray catalog and atlas of galaxies. (Fabbiano+, 1992)
An X-ray catalog and atlas of galaxies. Fabbiano G., Kim D.-W., Trinchieri G. <Astrophys. J. Suppl. Ser. 80, 531 (1992)> =1992ApJS...80..531F
ADC_Keywords: X-ray sources ; Galaxy catalogs Mission_Name: Einstein Keywords: atlases - catalogs - Galaxy: structure - X-rays: galaxies Abstract: 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file gxatlas.dat 64 716 Observation Info for the EINSTEIN Galaxy Catalog gxfluxes.dat 123 448 Flux Density Info for the EINSTEIN Galaxy Catalog
Byte-by-byte Description of file: gxatlas.dat
Bytes Format Units Label Explanations
2- 7 A6 --- Name Name of the object (NGC, IC, UGC number) 9 A1 --- note [ ab] Note: 'a' if AGN or 'b' if Virgo 11- 12 I2 h RAh Right Ascension (B1950) (hour) 14- 15 I2 min RAm Right Ascension (B1950) (min) 17- 18 I2 s RAs Right Ascension (B1950) (sec) 20 A1 --- DE- Declination sign (B1950) 21- 22 I2 deg DEd Declination (B1950) (deg) 24- 25 I2 arcmin DEm Declination (B1950) (arcmin) 27- 28 I2 arcsec DEs Declination (B1950) (arcsec) 30- 34 F5.2 10+20cm-2 nH Foreground column of HI (1) 36 A1 --- inst [IH] Instrument used (2) 38- 42 I5 --- Seqno Observation sequence number 44- 47 I4 yr obs.Y Year of start of observation minus 1900 49- 51 I3 d obs.D Day of start of observation 53- 59 F7.1 s livetime Time of observation (3) 61- 64 F4.1 arcmin offaxis Distance to field center (4)
Note (1): This column contains the Galactic column density of HI in the direction of the galaxy in question, in units of 1020 cm-2. The information is accurate to two significant digits. Note (2): instrument flag (I for IPC, and H for HRI), and the sequence number of the observation. Note (3): This column contains the total livetime of the observing sequence in seconds, quoted to one decimal place. Note (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.
Byte-by-byte Description of file: gxfluxes.dat
Bytes Format Units Label Explanations
2- 7 A6 --- Name Name of the object (NGC, IC, UGC number) 9- 10 A2 --- note [ a-e] Flag indicating ending note (1) 12- 13 I2 h RAh Right Ascension (B1950) (hour) 15- 16 I2 min RAm Right Ascension (B1950) (min) 18- 19 I2 s RAs Right Ascension (B1950) (sec) 21 A1 --- DE- Declination sign (B1950) 22- 23 I2 deg DEd Declination (B1950) (deg) 25- 26 I2 arcmin DEm Declination (B1950) (arcmin) 28- 29 I2 arcsec DEs Declination (B1950) (arcsec) 31 A1 --- instr [IH] Instrument used (2) 33- 37 I5 --- seqno Observation sequence number (3) 39- 43 F5.2 mag Bmag Apparent B magnitude (4) 45- 46 I2 --- type T-type following RC2 (5) 48- 49 I2 h RA_Xh ? Right Ascension (B1950) (hour) (6) 51- 52 I2 min RA_Xm ? Right Ascension (B1950) (min) 54- 55 I2 s RA_Xs ? Right Ascension (B1950) (sec) 57 A1 --- DE_X- ? Declination sign (B1950) (6) 58- 59 I2 deg DE_Xd ? Declination (B1950) (deg) 61- 62 I2 arcmin DE_Xm ? Declination (B1950) (arcmin) 64- 65 I2 arcsec DE_Xs ? Declination (B1950) (arcsec) 67- 70 I4 arcsec radius ? Size of aperture for flux extraction 72 A1 --- l_counts Flagged '<' if counts is an upper limit (7) 74- 81 F8.2 ct counts ? Total counts from EINSTEIN observation (7) 83- 87 F5.1 ct e_counts ? Error on count total (7) 89 A1 --- l_crate [ <] '<' if count rate is upper limit (8) 91- 97 F7.2 ct/ks crate ? Count-rate from EINSTEIN observation (8) 99 A1 --- l_FluxX [ <] '<' if flux is an upper limit (9) 101-107 F7.2 10-16W/m2 FluxX ? X-ray flux (9) 109-115 F7.3 Mpc dist Assumed distance in Megaparsecs (10) 117 A1 --- l_logLx [ <] '<' if luminosity is upper limit (11) 119-123 F5.2 [10-7W] logLx ? Log of the X-ray luminosity (11)
Note (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) Note (2): I for IPC, and H for HRI Note (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. Note (4): This column gives the B-band apparent magnitude from the RSA, RC2 or PCG (Patural's Principal Catalog of Galaxies). (Cat. VII/119) Note (5): This column gives the T-type, as defined in the RC2 (Cat. VII/112), using morphological information from the RSA, RC2, or PCG. Note (6): These columns give the B1950 right ascension and declination of the X-ray centroids of those objects detected by EINSTEIN. Note (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. Note (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. Note (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. Note (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. Note (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.
History: Prepared from the tables available at the "ADS Catalogue Service" (CfA, Harvard-Smithsonian Center for Astrophysics, Cambrigde MA) References: Long and van Speybroeck (1983) in "Accretion Driven X-Ray Sources", Lewin and van den Heuvel eds. (Cambridge: Cambridge U. Press) p. 117.
(End) Patricio Ortiz [CDS] 06-Apr-1999
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|