GCN Circular 44413
Subject
GRB 260424C: Fermi GBM Final Localization
Event
Date
2026-04-27T21:13:35Z (12 days ago)
Edited On
2026-04-29T14:20:20Z (10 days ago)
From
Angus Jameson <abj0023@uah.edu>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>
Via
Web form
The Fermi GBM team reports the detection of a likely SHORT GRB
"At 15:30:22.50 UT on 24 April 2026, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 260424C (trigger 798737427/260424646).
The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 171.74, Dec = 20.24 (J2000 degrees, equivalent to J2000 11h 26m, +20d 14'),
with a statistical uncertainty of 14.80 degrees.
The angle from the Fermi LAT boresight is 41 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260424646/quicklook/glg_skymap_all_bn260424646.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260424646/quicklook/glg_healpix_all_bn260424646.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260424646/quicklook/glg_lc_medres34_bn260424646.gif"