TITLE:   GCN CIRCULAR
NUMBER:  21734
SUBJECT: IPN Triangulation of GRB 170826A (short)
DATE:    17/08/28 18:38:45 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin@mail.ioffe.ru>

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Kozlova,
and T. Cline on behalf of the Konus-Wind team,

K. Hurley, on behalf of the IPN,

V. Connaughton, M. S. Briggs, C. Meegan, V. Pelassa,
and A. Goldstein, on behalf of the Fermi GBM 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 GRB 170826A (Poolakkil et al., GCN Circ. 21715) was detected
by Fermi (GBM trigger 525430272), Konus-Wind, and INTEGRAL (SPI-ACS)
at about 31868 s UT (08:51:08).

We have triangulated it to a preliminary, 3 sigma error box whose 
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    64.338 (04h 17m 21s) +21.074 (+21d 04' 26")
  Corners:
    65.488 (04h 21m 57s) +16.011 (+16d 00' 39")
    63.331 (04h 13m 19s) +25.959 (+25d 57' 32")
    63.050 (04h 12m 12s) +26.051 (+26d 03' 05")
    65.226 (04h 20m 54s) +16.124 (+16d 07' 27")
  ---------------------------------------------
The error box area is 2.3 sq. deg, and its maximum
dimension is 10.29 deg (the minimum one is 13.56 arcmin).
The Sun distance was 87 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB170826_T31868/IPN/

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