GCN Circular 45476
Subject
IPN triangulation of GRB 260829A
Event
Date
2026-08-31T19:15:43Z (a month ago)
From
Anna Ridnaia at Ioffe Institute <ridnaia@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,
A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin,
and T. Cline on behalf of the Konus-Wind team,
A. Goldstein, M. S. Briggs, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi-GBM 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 260829A
(Fermi-GBM detection: Fermi GBM team, GCN 45464;
Malacaria et al., GCN 45467;
BALROG localization: Preis & Greiner, GCN 45465;
GECAM-B detection: Zao et al., GCN 45470)
was detected by Fermi (GBM trigger 809676494),
Konus-Wind, GECAM-B, and Mars-Odyssey (HEND)
at about 22089 s UT (06:08:09).
We have triangulated it to the 3 sigma localization region
whose area is 5.2 sq. deg, and its maximum
dimension is 31 deg (the minimum one is 10 arcmin).
This localization may be improved.
A triangulation map and HEALPix FITS files are posted at
http://www.ioffe.ru/LEA/GRBs/GRB260829_T22110/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.