GCN Circular 23879

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,

and

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

The extremely bright, short-duration GRB 190206A
has been detected by Konus-Wind and Swift (BAT),
so far, at about 13759 s UT (03:49:19).
The burst was outside the coded field of view of the BAT.

We have triangulated it to two preliminary, 3 sigma error boxes
whose coordinates are:

Box 1:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   313.330 (20h 53m 19s) -30.510 (-30d 30' 35")
  Corners:
   324.521 (21h 38m 05s) -35.854 (-35d 51' 16")
   323.780 (21h 35m 07s) -36.074 (-36d 04' 27")
   307.665 (20h 30m 40s) -23.586 (-23d 35' 08")
   308.080 (20h 32m 19s) -23.489 (-23d 29' 22")
  ---------------------------------------------

Box 2:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   357.837 (23h 51m 21s) -14.585 (-14d 35' 07")
  Corners:
   354.375 (23h 37m 30s) -24.856 (-24d 51' 20")
   355.013 (23h 40m 03s) -24.585 (-24d 35' 08")
   357.410 (23h 49m 38s)  -6.031 ( -6d 01' 53")
   357.048 (23h 48m 12s)  -6.188 ( -6d 11' 16")
  ---------------------------------------------
The error box area is about 7.4 sq. deg, and their maximum
dimension is 19.05 deg (the minimum one is 23.2 arcmin).
The Sun distances were about 13 (Box 1) and 34 deg (Box 2).

This localization may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB190206_T13763/IPN/

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