TITLE:   GCN CIRCULAR
NUMBER:  22354
SUBJECT: IPN Triangulation of GRB 180113B
DATE:    18/01/16 15:03:48 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 bright long-duration GRB 180113B (Veres and Meegan, GCN Circ. 22329)
was detected by Fermi (GBM trigger 537495365), Konus-Wind,
and INTEGRAL (SPI-ACS) at about 960 s UT (00:16:00).

We have triangulated it to a preliminary, 3 sigma error box whose 
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
     6.697 (00h 26m 47s) +24.021 (+24d 01' 15")
  Corners:
     3.866 (00h 15m 28s) +27.572 (+27d 34' 20")
     8.260 (00h 33m 03s) +22.591 (+22d 35' 29")
     7.772 (00h 31m 05s) +22.219 (+22d 13' 07")
     3.373 (00h 13m 29s) +27.185 (+27d 11' 07")
  ---------------------------------------------
The error box area is 3.7 sq. deg, and its maximum
dimension is 6.4 deg (the minimum one is 35 arcmin).
The Sun distance was 82 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB180113_T00958/IPN

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