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GCN Circular 7136

Subject
IPN triangulation of very bright GRB 071125
Date
2007-11-27T18:37:01Z (16 years ago)
From
Valentin Pal'shin at Ioffe Inst <val@mail.ioffe.ru>
S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks,
P. Oleynik, M. Ulanov on behalf of the Konus-Wind and
Konus-A teams,

K. Hurley and T. Cline on behalf of the Ulysses, Mars Odyssey, Konus, 
and MESSENGER GRB teams,

W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on
behalf of the GRS-Odyssey GRB team,

I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin,
on behalf of the HEND-Odyssey GRB team,

E. Del Monte, Y. Evangelista, I. Lapshov, M. Rapisarda, A. Giuliani,
F. Fuschino, and M. Marisaldi, on behalf of the AGILE Team,

K. Yamaoka, M. Ohno, Y. Fukazawa, T. Takahashi, M. Tashiro, Y. Terada,
T. Murakami, and K. Makishima on behalf of the Suzaku WAM team
report:

A very bright GRB, 071125, occurred at about 50202 s UT (13:56:42).
It was observed by Mars Odyssey (GRS and HEND), Konus-Wind, Konus-A 
(Cosmos 2421), SuperAGILE, AGILE-MCAL, and Suzaku-WAM.  Ulysses and 
MESSENGER were off.

The burst light curve shows a multipeaked structure with a duration of 
~10 sec.

The IPN triangulated 3-sigma error box is as follows:
-----------------------------------------------
     RA(2000), deg            Dec(2000), deg
-----------------------------------------------
Center:
  251.230 (16h 44m 55s)   + 4.493 (+04d 29' 35")
Corners:
  252.211 (16h 48m 51s)   + 5.230 (+05d 13' 48")
  251.602 (16h 46m 24s)   + 5.044 (+05d 02' 40")
  250.227 (16h 40m 55s)   + 3.691 (+03d 41' 28")
  250.858 (16h 43m 26s)   + 3.931 (+03d 55' 50")
-----------------------------------------------

The error box area is 0.532 sq. deg.
The box can be improved.

Preliminary analysis of the Konus-Wind data yields
a burst fluence of ~7x10:-5 erg/cm2 (in the 20 keV - 3 MeV range),
and Epeak of the time-integrated spectrum of ~300 keV.

Detailed spectral parameters will be reported later.
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