GCN Circular 42826
Subject
GRB 251124A: Fermi GBM Localization by automated pipeline
Event
Date
2025-11-24T17:34:45Z (4 days ago)
Edited On
2025-11-24T19:35:26Z (4 days ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 12:58:03 UT on 24 Nov 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251124a (trigger 785681888.46989 / 251124540), which has also been reported in GCN 42820. An interruption in the automated pipeline caused the automated circular to be distributed later than normal.
The on-ground automated localization is consistent with the location in GCN 42820.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251124540/quicklook/glg_skymap_all_bn251124540.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251124540/quicklook/glg_healpix_all_bn251124540.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251124540/quicklook/glg_lc_medres34_bn251124540.gif