GRB 240125B
GCN Circular 35654
Subject
IPN triangulation of GRB 240125B (short)
Date
2024-01-30T19:43:07Z (3 years ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
Via
legacy email
D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko,
on behalf of the IPN,
A. Goldstein, M. S. Briggs, C. Wilson-Hodge,
and E. Burns on behalf of the Fermi GBM team,
and
E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
report:
The short-duration GRB 240125B
(Fermi-GBM detection: The Fermi GBM team, GCN 35634)
was detected by Fermi (GBM trigger 727908527), and
INTEGRAL (SPI-ACS) at about 74923 s UT (20:48:43).
We have triangulated it to a GBM-SPI-ACS annulus centered at
RA(2000)=132.059 deg (08h 48m 14s) Dec(2000)=+85.090 deg (+85d 05' 24")
whose radius is 34.188 +/- 6.337 deg (3 sigma).
The annulus combined with the Fermi-GBM final position (GCN 35634;
glg_healpix_all_bn240125867_v00) and the Fermi Earth-occultation information gives 575 sq. deg (3 sigma) localization region.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB240125_T74922/IPN/
GCN Circular 35634
Subject
GRB 240125B: Fermi GBM Final Localization
Date
2024-01-26T02:54:31Z (3 years ago)
From
Cori Fletcher at USRA <cfletcher@usra.edu>
Via
Web form
The Fermi GBM team reports the detection of a likely SHORT GRB
"At 20:48:42.61 UT on 25 January 2024, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 240125B (trigger 727908527/240125867).
The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 81.10, Dec = 21.10 (J2000 degrees, equivalent to J2000 5h 24m, +21d 6'),
with a statistical uncertainty of 16.96 degrees.
The angle from the Fermi LAT boresight is 78 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240125867/quicklook/glg_skymap_all_bn240125867.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240125867/quicklook/glg_healpix_all_bn240125867.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240125867/quicklook/glg_lc_medres34_bn240125867.gif"