TITLE:   GCN CIRCULAR
NUMBER:  15550
SUBJECT: IPN Triangulation of GRB 131126A (short/hard)
DATE:    13/11/29 16:58:21 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>

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, V. Pelassa, and A. Goldstein, 
on behalf of the Fermi GBM team,

K. Yamaoka, M. Ohno, Y. Hanabata, Y. Fukazawa, T. Takahashi, M. Tashiro,
Y. Terada, T. Murakami, and K. Makishima on behalf of the Suzaku WAM
team, and

K. Hurley on behalf of the IPN team, report:

The short-duration, hard spectrum, bright GRB 131126A has been observed 
by Fermi (GBM: trigger 407130853) and Konus-Wind, so far, at about 14050 
s UT (03:54:10).

We have triangulated it to a Konus-GBM annulus centered at 
RA(2000)=219.687 deg (14h 38m 45s)  Dec(2000)=-12.489 deg (-12d 29' 
20"), whose radius is 65.710 ± 0.084 deg (3 sigma).

Combined with the GBM 1-sigma statistical+systematic error contour, this 
constrains the arrival direction to that portion of the annulus between 
RA, Dec = 206.1, +52.1 and 222.6, +53.2 degrees.

A triangulation map is posted at 
http://www.ioffe.ru/LEA/GRBs/GRB131126_T14048/IPN/

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