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J/ApJ/681/1464   X-ray sources near soft gamma repeater in M31    (Ofek+, 2008)

GRB 070201: a possible soft gamma-ray repeater in M31. Ofek E.O., Muno M., Quimby R., Kulkarni S.R., Stiele H., Pietsch W., Nakar E., Gal-Yam A., Rau A., Cameron P.B., Cenko S.B., Kasliwal M.M., Fox D.B., Chandra P., Kong A.K.H., Barnard R. <Astrophys. J., 681, 1464-1469 (2008)> =2008ApJ...681.1464O (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Gamma rays ; Galaxies, nearby Keywords: galaxies: individual (M31) - gamma rays: bursts - pulsars: general - stars: neutron - X-rays: individual (GRB 070201) Abstract: GRB 070201 was a bright, short-duration, hard-spectrum gamma-ray burst detected by the Interplanetary Network. Its error quadrilateral, which has an area of 0.124deg2, intersects some prominent spiral arms of the nearby M31 (Andromeda) galaxy. Given the properties of this GRB, along with the fact that LIGO data argue against a compact binary merger origin in M31, it is an excellent candidate to have been an extragalactic soft gamma-ray repeater (SGR) giant flare, with an energy of 1.4x1045ergs. However, we cannot rule out the possibility that it was a short-duration GRB in the background. Analysis of ROTSE-IIIb visible-light observations of M31, taken 10.6hr after the burst and covering 42% of the GRB error region, does not reveal any optical transient down to a limiting magnitude of 17.1. We inspected archival and proprietary XMM-Newton X-ray observations of the intersection of the GRB error region and M31, obtained about 4 weeks prior to the outburst, in order to look for periodic variable X-ray sources. No SGR or anomalous X-ray pulsar (AXP) candidates (periods in the range 1-20s) were detected. We discuss the possibility of detecting extragalactic SGRs/AXPs by identifying their periodic X-ray light curves. Our simulations suggest that the probability of detecting the periodic X-ray signal of one of the known Galactic SGRs/AXPs, if placed in M31, is about 10% using a 50ks XMM-Newton exposure, increasing to 50% for a 2Ms observation. Description: Visible-light images of the Andromeda galaxy were obtained, between 2005 July and 2006 June, by the 0.45m ROTSE-IIIb telescope as part of the Texas Supernova Search. Routine unfiltered images covering the GRB error quadrilateral south of DEC=+42:08:57 (J2000) were taken on UTC 2007 February 2.0821, 10.6hr after the GRB trigger. The intersection region of the error quadrilateral of GRB 070201 with M31 has been observed by several facilities, with archival data available, including ROSAT, the Galaxy Evolution Explorer (GALEX), and XMM-Newton. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 67 149 X-ray sources searched for periodicty
See also: B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2009) J/ApJS/173/643 : GALEX UV photometry of M31 Globular Clusters (Rey+, 2007) J/A+A/473/347 : BeppoSAX complete catalogue of GRBs (Vetere+, 2007) J/A+A/434/483 : An XMM-Newton survey of M 31 (Pietsch+, 2005) J/A+A/373/63 : M31 second ROSAT PSPC survey (Supper+, 2001) J/A+AS/114/215 : New SNR candidates in M31 (Magnier+, 1995) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 15 A15 --- [OMQ2008] Coordinate designation name (HHMMSS.s+DDMMSS) 17- 25 F9.5 deg RAdeg Right ascension in decimal degrees (J2000) 27- 35 F9.5 deg DEdeg Declination in decimal degrees (J2000) 37- 42 F6.1 arcsec Aper Aperture radius (1) 45- 53 I9 ct Cts Source counts within aperture 55- 67 A13 --- ObsID XMM observation ID
Note (1): In which source counts were extracted.
Nomenclature note: Sources are <[OMQ2008] JHHMMSS.s+DDMMSS> in Simbad. History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 03-Nov-2010
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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