GCN Circular 27626

K. Hurley, on behalf of the IPN,

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

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia,
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,

S. Barthelmy, J. Cummings, H. Krimm, and D. Palmer,
on behalf of the Swift-BAT team, and

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

The long-duration, very bright GRB 200422A
has been detected by Konus-Wind, INTEGRAL (SPI-ACS), Mars-Odyssey 
(HEND), and Swift (BAT), so far, at about 26536 s UT (07:22:16).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   196.399 (13h 05m 36s) -20.245 (-20d 14' 41")
  Corners:
   195.143 (13h 00m 34s) -22.037 (-22d 02' 12")
   195.441 (13h 01m 46s) -22.030 (-22d 01' 48")
   197.651 (13h 10m 36s) -18.334 (-18d 20' 02")
   197.341 (13h 09m 22s) -18.387 (-18d 23' 14")
  ---------------------------------------------
The error box area is 3548 sq. arcmin, and its maximum
dimension is 4.4 deg (the minimum one is 14 arcmin).
The Sun distance was about 162 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200422_T26537/IPN

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