TITLE:   GCN CIRCULAR
NUMBER:  38879
SUBJECT: IPN triangulation of GRB 250107C
DATE:    25/01/09 22:04:46 GMT
FROM:    Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>

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

Y. Zhang, C. Wang, S. Xiong, J. Wei, and B. Cordier
on behalf of the SVOM-GRM team,

A. Goldstein, M. S. Briggs, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi GBM team,

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

The long-duration GRB 250107C
(SVOM-GRM and GECAM-B detections: Xue et al., GCN 38870)
was detected by Konus-Wind, SVOM (GRM), and GECAM-B
at about 67936 s UT (18:52:16).

We have triangulated it to a preliminary, 3 sigma error box
whose area is 22.6 sq. deg, and its maximum
dimension is 22.8 deg (the minimum one is 1.0 deg).
The Sun distance was 73 deg.

This localization may be improved.

A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB250107_T67934/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.