TITLE: GCN CIRCULAR NUMBER: 41448 SUBJECT: IPN triangulation of GRB 250816A (short) DATE: 25/08/20 14:52:01 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,
A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team, report:
The short-duration GRB 250816A (Fermi-GBM detection: The Fermi GBM team, GCN 41397; SVOM-GRM detection: Wang et al., GCN 41400) was detected by Fermi (GBM trigger 777000615), SVOM (GRM), and Konus-Wind at about 5410 s UT (01:30:10). The burst was outside the coded field of view of the BAT.
We have triangulated it to a preliminary, 3 sigma error box whose area is 7.8 sq. deg, and its maximum dimension is 32.2 deg (the minimum one is 18.7 arcmin). The Sun distance was ~46 deg.
This localization may be improved.
A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB250816_T05407/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.
View this GCN Circular online at https://gcn.nasa.gov/circulars/41448. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...