GCN Circular 41051

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

"At 15:39:54.99 UT on 09 July 2025, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 250709A (trigger 773768399/250709653).

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 303.29, Dec = 34.66 (J2000 degrees, equivalent to J2000 20h 13m, +34d 39'),
with a statistical uncertainty of 4.56 degrees.

The angle from the Fermi LAT boresight is 24 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250709653/quicklook/glg_skymap_all_bn250709653.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/bn250709653/quicklook/glg_healpix_all_bn250709653.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250709653/quicklook/glg_lc_medres34_bn250709653.gif"