GCN Circular 35862
Subject
IPN triangulation of GRB 240303B
Event
Date
2024-03-04T18:38:51Z (2 years ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
Via
legacy email
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,
A. Goldstein, M. S. Briggs, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi GBM team,
E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB 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 240303B
(Fermi-GBM detection: The Fermi GBM team, GCN 35850;
Hamburg and Meegan, GCN 35860;
BALROG localization: Preiset al., GCN 35851;
CALET-GBM detection: Nakahira et al., GCN 35857)
has been detected by Fermi (GBM trigger 731161136),
INTEGRAL (SPI-ACS), Konus-Wind, CALET (GBM),
and Mars-Odyssey (HEND), so far, at about 44331 s UT (12:18:51).
We have triangulated this GRB to the following annuli:
---------------------------------------------------
annulus R.A. Dec. R dR (3sigma)
(deg) (deg) (deg) (deg)
---------------------------------------------------
Konus-GBM 320.846 -16.019 24.529 2.743
GBM-SPI-ACS 194.036 78.908 88.157 8.554
GBM-HEND 317.319 -17.507 23.796 0.133
---------------------------------------------------
The annuli intersect to form a long 8.1 sq.deg (3 sigma)
localization region.
The IPN localization is consistent with, but reduces the area of,
the Fermi-GBM final and the BALROG localizations.
This localization may be improved.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240303_T44327/IPN
The Konus-Wind time history and spectrum will be given
in a forthcoming GCN circular.