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 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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)
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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.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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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
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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.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 09-Dec-2002