GCN Circular 42680
Subject
IPN triangulation of GRB 251108C
Event
Date
2025-11-14T13:10:56Z (a year ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
Via
Web form
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin
on behalf of the HEND/Mars Odyssey team,
D. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia,
and T. Cline on behalf of the Konus-Wind team,
E. Burns on behalf of the IPN,
G. Waratkar, J.Joshi, V. Bhalerao, D. Bhattacharya, A. Arya,
and S. Vadawale, on behalf of the Astrosat-CZTI team,
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 251108C
(AstroSat-CZTI detection: Salunke et al., GCN 42664)
was detected by Konus-Wind, AstroSat (CZTI), and Mars-Odyssey (HEND),
at about 83275 s UT (23:07:55).
We have triangulated it to a preliminary, 3 sigma error box
whose area is 2.13 sq. deg, and its maximum
dimension is 40 deg (the minimum one is 5 arcmin).
The Sun distance was ~155 deg.
This localization may be improved.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB251108_T83283/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.