TITLE:   GCN CIRCULAR
NUMBER:  13549
SUBJECT: IPN Triangulation of GRB 120728B (long/intense)
DATE:    12/07/31 10:36:31 GMT
FROM:    Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>

K. Hurley on behalf of the Mars Odyssey and MESSENGER GRB teams,

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

S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks,
D. Svinkin, and T. Cline on behalf of the Konus-Wind team,

V. Connaughton, M. Briggs, and C. Meegan, on behalf of the Fermi
GBM team,

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

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo, and C.
Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and

D. M. Smith, J. McTiernan, and W. Hajdas, on behalf of the
RHESSI team,  report:

The long-duration, intense GRB 120728B was observed by Konus-Wind, Fermi 
(GBM: trigger 365163927), INTEGRAL (SPI-ACS), Mars Odyssey (HEND), and 
RHESSI at about 37524 s UT (10:25:24).

We have triangulated it to a preliminary, 3 sigma error box whose
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   103.772 (06h 55m 05s) -45.893 (-45d 53' 36")
  Corners:
   103.695 (06h 54m 47s) -44.477 (-44d 28' 37")
   103.463 (06h 53m 51s) -47.210 (-47d 12' 37")
   103.857 (06h 55m 26s) -47.308 (-47d 18' 29")
   104.069 (06h 56m 17s) -44.576 (-44d 34' 33")
  ---------------------------------------------
The error box area is 0.745 sq. deg, and its maximum
dimension is 2.8 deg.

This box can be improved.

The time history and spectrum will be given in a forthcoming GCN Circular.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB120728_T37534/IPN/