TITLE:   GCN CIRCULAR
NUMBER:  26086
SUBJECT: IPN triangulation of GRB 191025B (short)
DATE:    19/10/28 20:30:41 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,

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and

Q. Luo, X. B. Li, Y. Huang, S. L. Xiong, and S. N. Zhang,
on behalf of the Insight-HXMT team, report:

The short-duration, very bright GRB 191025B
(Insight-HXMT detection: Luo et al., GCN Circ. 26081)
was detected by Konus-Wind, INTEGRAL (SPI-ACS), and Insight-HXMT,
at about 67329 s UT (18:42:09).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    60.104 (04h 00m 25s) +56.480 (+56d 28' 47")
  Corners:
    61.751 (04h 07m 00s) +54.782 (+54d 46' 54")
    60.165 (04h 00m 40s) +56.600 (+56d 36' 01")
    58.207 (03h 52m 50s) +58.177 (+58d 10' 36")
    60.041 (04h 00m 10s) +56.360 (+56d 21' 36")
  ---------------------------------------------
The error box area is 1261 sq. arcmin, and its maximum
dimension is 3.9 deg (the minimum one is 10.3 arcmin).
The Sun distance was about 130 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB191025_T67331/IPN/

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