GCN Circular 5210
Subject
GRB 060602B: XMM-Newton Survey Source
Event
Date
2006-06-04T01:54:48Z (20 years ago)
From
Jules Halpern at Columbia U. <jules@astro.columbia.edu>
I note that a faint source was detected by XMM-Newton in a survey
observation of the Galactic plane on 2000 September 23 at a position
consistent, to within their combined uncertainties, with the Swift
XRT source (Beardmore et al., GCN 5209) in the error circle of the
possible GRB 060602B (trigger #213190: Schady et al., GCN 5200).
R.A.(2000) Dec.(2000) +/-(")
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Swift XRT 17 49 31.6 -28 08 03.2 3.7
XMM-Newton 17 49 31.59 -28 08 08.7 4
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It is listed in the XMMSSC-XMM-Newton Serendipitous Source Catalog
as having a flux of 6.9x10^-14 erg/cm2/s in the 0.2-12 keV range.
Therefore, it is possible that this is a Galactic X-ray burster,
as noted by Palmer et al. (GCN 5208). If at a distance of 8 kpc,
for example, its 15-150 keV fluence in the BAT of 1.8x10^-7 erg/cm2
(Palmer et al., GCN 5208) corresponds to an average luminosity of
1.1x10^38 erg/s in this band over the 13 s duration of the burst,
and its 0.2-12 keV luminosity seen by XMM was 5.3x10^32 erg/s, within
the range of quiescent LMXBs (e.g., Tomsick et al. 2004, ApJ, 610, 933).