GCN Circular 15245
Subject
IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
Date
2013-09-24T19:05:37Z (11 years ago)
From
Valentin Pal'shin at Ioffe Inst <val@mail.ioffe.ru>
V. Pal'shin, R. Aptekar, D. Frederiks, S. Golenetskii, D. Svinkin, and
T. Cline on behalf of the Konus-Wind team,
K. Hurley on behalf of the IPN,
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. S. Briggs, C. Meegan, and V. Pelassa, 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 bright SGR-like burst detected by Fermi-GBM at 15:00:28.44 UT on 13
September 2013 (Collazzi, Xiong, and Kouveliotou, GCN 15228) was also
observed by Konus-Wind, INTEGRAL SPI-ACS, and Swift-BAT. The burst was
outside the coded field of view of the BAT.
We have triangulated it to an annulus centered at RA(2000)=304.668 deg
(20h 18m 40s) Dec(2000)=+54.308 deg (+54d 18' 30"), whose radius is
62.790 �� 3.144 deg (3 sigma). The position of SGR 1833-0832 (the
suggested source of two GBM SGR-like bursts: GCN 15228) lies outside the
annulus, and therefore this SGR is unlikely to be the source of the
bursts. The position of SGR/AXP 1E1841-045 (=PSR J1841-0456) lies 0.230
deg (0.2 sigma) from the annulus center line and 3.89 deg from the GBM
position reported in GCN 15228 (and 4.08 deg from SGR 1833-0832). So it
is likely that the bright SGR-like burst 130913 originated from this
SGR/AXP.
A triangulation map is posted at
http://www.ioffe.ru/LEA/SGRs/130913_T54028/IPN/