GCN 45792: IPN triangulation of GRB 260919A / EP260920a
2026-10-01T13:14:13.411Z | rev 0
D. Svinkin, D. Frederiks, A. Lysenko, V. Panteleeva, A. Ridnaia,
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,
report:
The long-duration GRB 260919A was detected by Konus-Wind and
Fermi (GBM trigger 811554497) at about 85692 s UT (23:48:12).
We have triangulated it to the 3 sigma IPN localization region
whose area is 6556 sq. deg, and its maximum
dimension is 147 deg (the minimum one is ~66 deg).
This localization may be improved.
The fast X-ray transient EP260920a (Ni et al., GCN 45649) which was detected ~800 s after GRB 260919A, is inside the IPN localization region. The positional and temporal proximity of GRB 260919A with EP260920a may suggest that both events have a common origin.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB260919_T85725/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.