GCN Circular 45091

A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin
on behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams,

J. Benkhoff on behalf of the BepiColombo team,

A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin,
and T. Cline on behalf of the Konus-Wind team,

E. Burns on behalf of the IPN,

and

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

The long-duration GRB 260627A
was detected by Konus-Wind, Mars-Odyssey (HEND), and
BepiColombo (MGNS), at about 6500 s UT (01:48:20).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
 ---------------------------------------------
  RA(2000), deg                 Dec(2000), deg
 ---------------------------------------------
 Center:
   97.683 (06h 30m 44s) -11.018 (-11d 01' 04")
 Corners:
   96.021 (06h 24m 05s) -10.787 (-10d 47' 15")
   98.614 (06h 34m 27s) -12.214 (-12d 12' 51")
   99.375 (06h 37m 30s) -11.186 (-11d 11' 10")
   96.787 (06h 27m 09s)  -9.778 ( -9d 46' 42")
 ---------------------------------------------
The error box area is 3.6 sq. deg, and its maximum
dimension is 3.3 deg (the minimum one is 1.2 deg).
The Sun distance was 34 deg.

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
https://www.ioffe.ru/LEA/GRBs/GRB260627_T06499/IPN/
The HEALPix triangulation map is the multi-order HEALPix in units of
probability density.

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