[vsnet-grb-info 13931] IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15245
SUBJECT: IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
DATE:    13/09/24 19:05:37 GMT
FROM:    Valentin Pal'shin at Ioffe Inst  <val at 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/