TITLE:   GCN CIRCULAR
NUMBER:  14021
SUBJECT: IPN Triangulation of GRB 121127A (short/hard)
DATE:    12/11/29 22:05:59 GMT
FROM:    Valentin Pal'shin at Ioffe Inst  <val@mail.ioffe.ru>

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

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,

J. Goldsten, on behalf of the MESSENGER GRNS GRB team,

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

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

S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer, on
behalf of the Swift-BAT team, and

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

A short-duration, hard spectrum GRB 121127A was observed by Konus-Wind, 
Fermi (GBM: trigger 375746163), INTEGRAL (SPI-ACS), MESSENGER (GRNS), 
Swift (BAT), Mars Odyssey (HEND), and Suzaku (WAM) at about 78960 s UT 
(21:56:00).

We have triangulated it to a preliminary, 3 sigma error box whose
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   176.438 (11h 45m 45s) -52.414 (-52d 24' 52")
  Corners:
   176.369 (11h 45m 29s) -52.649 (-52d 38' 58")
   176.255 (11h 45m 01s) -52.512 (-52d 30' 44")
   176.507 (11h 46m 02s) -52.179 (-52d 10' 45")
   176.620 (11h 46m 29s) -52.316 (-52d 18' 59")
  ---------------------------------------------
The error box area is 158 sq. arcmin, and its maximum
dimension is 29 arcmin (the minimum one is 9 arcmin; the minimum annulus 
width is 3.6 arcmin).

This box can be improved.

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