GCN Circular 44447
Subject
GRB 260502A: Fermi GBM Final Localization
Event
Date
2026-05-03T05:20:13Z (7 days ago)
Edited On
2026-05-04T18:15:36Z (5 days ago)
From
Rushikesh Sonawane at IISER TVM <rushikesh23@iisertvm.ac.in>
Edited By
Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Rushikesh Sonawane at IISER TVM <rushikesh23@iisertvm.ac.in>
Via
Web form
The Fermi GBM team reports the detection of a likely SHORT GRB
"At 05:01:00.25 UT on 02 May 2026, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 260502A (trigger 799390865/260502209).
The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 283.76, Dec = 57.62 (J2000 degrees, equivalent to J2000 18h 55m, +57d 37′),
with a statistical uncertainty of 13.77 degrees.
The angle from the Fermi LAT boresight is 23 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260502209/quicklook/glg_skymap_all_bn260502209.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/bn260502209/quicklook/glg_healpix_all_bn260502209.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260502209/quicklook/glg_lc_medres34_bn260502209.gif"