GCN Circular 37026
Subject
IPN triangulation of GRB 240802A / EP 240802a
Date
2024-08-04T13:52:18Z (4 months ago)
Edited On
2024-08-05T15:44:14Z (4 months ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
Edited By
Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
Via
Web form
D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko,
and T. Cline on behalf of the Konus-Wind team,
E. Burns, on behalf of the IPN,
E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
G. Waratkar, V. Jethwani, J.Joshi, V. Bhalerao, D. Bhattacharya, and S. Vadawale,
on behalf of the Astrosat-CZTI team, report:
The long-duration GRB 240802A
(AstroSat-CZTI detection: Waratkar et al., GCN 37018;
SVOM-GRM detection: Wang et al., GCN 37022)
was detected by Astrosat (CZTI), Konus-Wind, and INTEGRAL (SPI-ACS),
and SVOM (GRM) at about 38044 s UT (10:34:04).
We have triangulated it to a preliminary, 3 sigma error region
whose area is 394 sq. deg, and its maximum
dimension is 51 deg (the minimum one is 6.7 deg).
This localization may be improved.
The X-ray transient EP 240802a (Wang et al., GCN 37019) is inside the region
(at the distance of 0.7 deg from the center line of the Konus-SPI-ACS annulus and
0.4 deg from the center line of Konus-CZTI annulus),
supporting the association of the GRB and EP 240802a.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240802_T38048/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.