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[vsnet-alert 1199] Draft of IAUC submission
- Date: Fri, 12 Sep 1997 11:49:59 -0400 (EDT)
- To: dasmith (Don Smith), roland (Roland Vanderspek), cui (Wei Cui), rr (Ron Remillard), hale (Hale Bradt), shirey (Bob Shirey), aml (Al Levine), ehm (Ed Morgan), lqw (Linqing Wen), jgj@sunspot.ssl.berkeley.edu (J. Garrett Jernigan), xtesof@athena.gsfc.nasa.gov (XTE SOF), jcg@tango.aip.de (Jochen Greiner), rutledge@rosat.mpe-garching.mpg.de (Bob Rutledge), derekfox (Derek Fox), muno (Mike Muno), shirey (Bob Shirey), marshall@lheamail.gsfc.nasa.gov (Frank Marshall), vxw@capella.gsfc.nasa.gov, vsnet-alert@kusastro.kyoto-u.ac.jp, marsden@cfa.harvard.edu, green@cfa.harvard.edu, swank@pcasun1.gsfc.nasa.gov
- From: "Don A. Smith" <dasmith@space.mit.edu>
- Subject: [vsnet-alert 1199] Draft of IAUC submission
- Sender: owner-vsnet-alert@kusastro.kyoto-u.ac.jp
GRB 970912
D. A. Smith, A. M. Levine, E. H. Morgan, and R. A. Remillard (MIT), on
behalf of the RXTE/ASM team at MIT and NASA/GSFC, and R. Rutledge
(MPE) report:
The RXTE All Sky Monitor has detected the gamma-ray burst of
Sep. 12.25652 UT that was logged as BATSE trigger no. 6377. The burst
was detected by ASM camera 3 as a bright X-ray flash that lasted ~2.8
s and yielded a peak count rate of ~270 cts/s. The inferred peak flux,
including corrections for background and location in the field of
view, is ~10 Crab (2-12 keV). The instrument software issued a
command to turn off the detector high voltage ~10 seconds after the
burst, presumably because of a high background count rate induced by
the burst itself. This eliminated the opportunity for observations of
the burst location by the same camera (i.e., no. 3) from a different
position angle ~25 seconds after the burst. Our results are therefore
limited to a single detection, yielding an error box (90% confidence)
with dimensions 2.2 degrees by 3.5 arcminutes. The corners of this
box are at R.A. = 18h25m39.0s, Decl. = -14o51'48"; 18h25m42.6s,
-14o48'50"; 18h34m24.9s, -15o28'10"; 18h34m4.5s -15o23'31" (equinox
2000). If the long dimension of this error box is extended, it would
lie only ~10 arcmin from GX 17+2, which was in the field during the
burst. We have checked for possible interference from that source and
do not believe that it is a serious problem.
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