GCN Circular 23808

K. Hurley, on behalf of the IPN,

I. G. Mitrofanov, D. Golovin, M. L. Litvak, and A. B. Sanin,
on behalf of the HEND-Odyssey GRB team,

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

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

and

W. Boynton, C. Fellows, K. Harshman, H. Enos, and R. Starr,
on behalf of the GRS-Odyssey GRB team, report:

The extremely bright, long-duration GRB 190129B
was detected by Konus-Wind, INTEGRAL (SPI-ACS), and
Mars-Odyssey (HEND) at about 44134 s UT (12:15:34).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   117.285 (07h 49m 08s)  +1.257 ( +1d 15' 24")
  Corners:
   117.253 (07h 49m 01s)  +0.258 ( +0d 15' 28")
   117.088 (07h 48m 21s)  +0.627 ( +0d 37' 38")
   117.326 (07h 49m 18s)  +2.291 ( +2d 17' 26")
   117.485 (07h 49m 56s)  +1.896 ( +1d 53' 45")
  ---------------------------------------------
The error box area is about 1284 sq. arcmin, and its maximum
dimension is 2.034 deg (the minimum one is 12.84 arcmin).
The Sun distance was about 157 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB190129_T44134/IPN

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