GRB 111113A

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, and J. Goldsten, on behalf of the MESSENGER NS GRB team,

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

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

The short-duration, hard, intense GRB 111113A has been observed by 
INTEGRAL (SPI-ACS), Konus-Wind, MESSENGER (GRNS), and Swift (BAT) 
(outside the coded field of view) so far, at about 18618 s UT (05:10:18).
We have triangulated it to a preliminary, 3 sigma error box whose 
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   225.390 (15h 01m 34s)  +2.185 ( +2d 11' 05")
  Corners:
   224.649 (14h 58m 36s)  +1.899 ( +1d 53' 57")
   225.195 (15h 00m 47s)  +2.382 ( +2d 22' 56")
   226.104 (15h 04m 25s)  +2.430 ( +2d 25' 47")
   225.583 (15h 02m 20s)  +1.985 ( +1d 59' 05")
  ---------------------------------------------

The error box area is 1408 sq. arcmin, and its maximum dimension is 93 
arcmin.

This box can be improved.

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

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

The short hard intense GRB 111113A
(localized by IPN: Golenetskii et al., GCN 12556
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triggered Konus-Wind at T0=18613.625s UT (05:10:13.625)

The light curve consists of a single hard peak with
a total duration of ~160 ms. There is a hint of a weaker
emission starting ~200 ms before the main pulse
and extending to ~T0+500ms;
The emission is seen up to ~10 MeV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB111113_T18613/

As observed by Konus-Wind the burst
had a fluence of (7.7 � 1.0)x10-6 erg/cm2,
and a 16-ms peak flux, measured from T0+0.016 s,
of (9.2 � 1.8)x10-5 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).

The spectrum of the burst (measured from T0 to T0+0.128 s)
is best fitted in the 40 keV - 10 MeV range
by a power law with exponential cutoff model, for which
alpha = -0.53 (-0.16, +0.18),
and Ep = 1480(-226, +265) keV,
chi2 = 20.7/23 dof.
Also, a noticeable counts excess over this model spectrum
is observed in the 20-40 keV range.


All the quoted results are preliminary.
All the quoted errors are at the 90% confidence level.