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J/ApJ/578/114       Chandra HRC source in M31                (Kaaret, 2002)

A Chandra High Resolution Camera observation of X-ray point sources in M31. Kaaret P. <Astrophys. J. 578, 114 (2002)> =2002ApJ...578..114K
ADC_Keywords: X-ray sources Mission_Name: Chandra Keywords: galaxies: individual (M31, NGC 224) - galaxies: spiral - X-rays: binaries - X-rays: galaxies - X-rays: general Abstract: We present results from a 47ks observation of the Andromeda galaxy, M31, using the High Resolution Camera of the Chandra X-Ray Observatory. We detect 142 point sources spanning 3 orders of magnitude in luminosity, from LX=2x1035 to 2x1038erg/s in the 0.1-10keV band. The X-ray source location accuracy is better than 1" in the central regions of the galaxy. One source lies within 1.3" of SN 1885 but does not coincide with the UV absorption feature identified as the supernova remnant. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 71 143 Chandra HRC sources in M31 table2.dat 54 22 Coincidences of Chandra Sources with Infrared Sources and Globular Clusters
See also: B/2mass : The 2MASS database (IPAC/UMass, 2000) J/A+A/389/439 : Photometry in field of RX J004404.8+411820 (Nedialkov+, 2002) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 16 A16 --- CXOM31 Chandra HRC source name (1) 18- 19 I2 h RAh Hour of Right Ascension (J2000) (1) 21- 22 I2 min RAm Minute of Right Ascension (J2000) (1) 24- 28 F5.2 s RAs Second of Right Ascension (J2000) (1) 30 A1 --- DE- [+] Declination sign 31- 32 I2 deg DEd Degree of Declination (J2000) (1) 34- 35 I2 arcmin DEm Arcminute of Declination (J2000) (1) 37- 40 F4.1 arcsec DEs Arcsecond of Declination (J2000) (1) 42- 47 F6.1 --- S/N Source detection significance in σ 49- 54 F6.1 ct Counts Net counts 56- 60 F5.1 10-6cm-2/s Flux Photon flux in units of 10-6photons/cm2/s 62- 65 F4.1 10-6cm-2/s e_Flux Uncertainty in Flux 67- 71 F5.1 10+29W Lum Luminosity in units of 1036erg/s (2)
Note (1): Source names are formed by appending the coordinates, truncated to the first decimal of seconds in RA and whole seconds in DEC, to the identifier CXOM31. Note (2): The estimated luminosity based on the spectral model described in the text.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 16 A16 --- CXOM31 Chandra HRC source 18- 32 A15 --- 2MASS 2MASS infrared source 34- 36 F3.1 arcsec DeltaX-IR ? Displacement between the Chandra and 2MASS sources 39- 45 A7 --- GC Name of the globular cluster (1) 47- 49 F3.1 arcsec DeltaX-GC ? Displacement between the Chandra and source and the globular cluster 52- 54 F3.1 arcsec DeltaGC-IR ? Displacement between the globular cluster and the 2MASS source
Note (1): Globular clusters taken from Barmby (2001, Ph.D. thesis, Harvard Univ.) are listed as two sets of three digits ([BHB2000] NNN-NNN in Simbad), and those taken from Magnier (1993, Ph.D. thesis, MIT) are listed as MIT followed by three digits.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 09-Dec-2002
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

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