[vsnet-grb-info 7564] GRB 090410: Swift detection of a burst
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sat Apr 11 02:10:29 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 9122
SUBJECT: GRB 090410: Swift detection of a burst
DATE: 09/04/10 17:10:20 GMT
FROM: David Palmer at LANL <palmer at lanl.gov>
D. Grupe (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
M. M. Chester (PSU), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA),
N. P. M. Kuin (MSSL), K. L. Page (U Leicester), D. M. Palmer (LANL),
J. L. Racusin (PSU), M. H. Siegel (PSU), M. Stamatikos (NASA/ORAU),
M. C. Stroh (PSU) and T. N. Ukwatta (GSFC/GWU) report on behalf of
the Swift Team:
At 16:57:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 090410 (trigger=348929). Swift could not slew to the GRB
due to a Sun constraint. The BAT on-board calculated location is
RA, Dec 334.980, +15.471 which is
RA(J2000) = 22h 19m 55s
Dec(J2000) = +15d 28' 16"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a complex peak
from T-10 to T+40, followed by another broad peak from T+80 to T+140.
The peak count rate was ~6000 counts/sec (15-350 keV), at ~6
sec after the trigger.
Swift cannot slew to the BAT position. The burst is sun-constrained
until Tuesday, 2009 April 14. There will thus be no XRT or UVOT
data for this trigger.
Burst Advocate for this burst is D. Grupe (grupe AT astro.psu.edu).
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
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