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GCN Circular 12714

Subject
IPN Triangulation of GRB 111222A (short/hard/intense)
Date
2011-12-23T16:27:26Z (12 years ago)
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,

J. Goldsten, on behalf of the MESSENGER NS 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,

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

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

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

The short-duration, hard, intense GRB 111222A has been observed by
Fermi (GBM), Konus-Wind, INTEGRAL (SPI-ACS), MESSENGER (GRNS), Mars
Odyssey (HEND), and Swift (BAT) (outside the coded field of view) so
far, at about 53515 s UT (14:51:55). We have triangulated it to a
preliminary, 3 sigma error box whose coordinates are:
---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
---------------------------------------------
Center:
  179.193 (11h 56m 46s) +69.036 (+69d 02' 10")
Corners:
  179.439 (11h 57m 45s) +68.877 (+68d 52' 37")
  179.815 (11h 59m 16s) +69.133 (+69d 07' 59")
  178.942 (11h 55m 46s) +69.195 (+69d 11' 41")
  178.575 (11h 54m 18s) +68.936 (+68d 56' 11")
---------------------------------------------
The error box area is 317 sq. arcmin, and its maximum
dimension is 29 arcmin.
This box can be improved.

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

A Swift ToO observation has been requested.
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