GCN Circular 35489
Subject
IPN triangulation of GRB 240101C (short)
Date
2024-01-05T19:17:11Z (4 months ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
Via
legacy email
D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko,
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
S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu
on behalf of the Swift-BAT team, report:
The short-duration GRB 240101C
(Fermi-GBM detection: The Fermi GBM team, GCN 35451;
Bala et al., GCN 35488;
GRBAlpha detection: Dafcikova et al., GCN 35459;
AstroSat-CZTI detection: Navaneeth et al., GCN 35478;
Swift-BAT/GUANO detection: DeLaunay et al., GCN 35482)
has been detected by Fermi (GBM trigger 725806648), Swift (BAT), GRBAlpha, Konus-Wind, INTEGRAL (SPI-ACS), and AstroSat (CZTI),
so far, at about 46644 s UT (12:57:24).
The burst was outside the coded field of view of the BAT.
We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
---------------------------------------------
RA(2000), deg Dec(2000), deg
---------------------------------------------
Center:
358.487 (23h 53m 57s) +28.743 (+28d 44' 36")
Corners:
0.797 (00h 03m 11s) +24.032 (+24d 01' 56")
1.127 (00h 04m 30s) +23.926 (+23d 55' 33")
355.725 (23h 42m 54s) +33.705 (+33d 42' 18")
355.318 (23h 41m 16s) +33.852 (+33d 51' 06")
---------------------------------------------
The error box area is 2.5 sq. deg and its maximum
dimension is 11.15 deg (the minimum one is 14 arcmin).
The Sun distance was 90 deg.
This localization may be improved.
The IPN localization is consistent with, but reduces the area of,
the Fermi-GBM localizations.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240101_T46643/IPN/