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GCN Circular 15397

Subject

IPN Triangulation of GRB 131028A (long/bright)

Date

2013-10-29T15:42:55Z (11 years ago)

From

Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>

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

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

V. Connaughton, M. S. 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

G. Di Cocco, F. Fuschino, M. Galli, C. Labanti, and M. Marisaldi, on
behalf of the AGILE MCAL team, report:

The long, bright GRB 131028A was observed by Konus-Wind, Fermi (GCN 
15396Loading...
 
 ), INTEGRAL (SPI-ACS), Swift (BAT), AGILE (MCAL), and MESSENGER 
(GRNS) at about 6542 s UT (01:49:02). The burst was outside the coded 
field of view of the BAT.

We have triangulated it to a 3 sigma error box whose
coordinates are:
---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    61.225 (04h 04m 54s) +71.595 (+71d 35' 41")
  Corners:
    69.087 (04h 36m 21s) +70.098 (+70d 05' 51")
    66.215 (04h 24m 52s) +70.982 (+70d 58' 56")
    52.752 (03h 31m 00s) +72.570 (+72d 34' 14")
    56.127 (03h 44m 30s) +72.015 (+72d 00' 52")
  ---------------------------------------------
The error box area is 1.3 sq. deg, and its maximum dimension is
5.8 deg (the minimum one is 1.2 deg).

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB131028_T06546/IPN/

Some improvement in this triangulation is possible.