TITLE:   GCN CIRCULAR
NUMBER:  41527
SUBJECT: GRB 250824B: Fermi GBM Final Real-time Localization
DATE:    25/08/24 13:48:54 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely SHORT GRB

At 13:38:13 UT on 24 Aug 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250824B (trigger 777735498.8624 / 250824568).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 248.3, Dec = -35.6 (J2000 degrees, equivalent to J2000 16h 33m, -35d 36'), with a statistical uncertainty of 7.7 degrees.

The angle from the Fermi LAT boresight is 27.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250824568/quicklook/glg_skymap_all_bn250824568.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/bn250824568/quicklook/glg_healpix_all_bn250824568.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250824568/quicklook/glg_lc_medres34_bn250824568.gif