TITLE:   GCN CIRCULAR
NUMBER:  41097
SUBJECT: GRB 250715A: Fermi GBM Final Real-time Localization
DATE:    25/07/15 15:04:48 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 LONG GRB

At 14:54:18 UT on 15 Jul 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250715A (trigger 774284063.63281 / 250715621).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 205.4, Dec = 41.2 (J2000 degrees, equivalent to J2000 13h 41m, 41d 12'), with a statistical uncertainty of 4.3 degrees.

The angle from the Fermi LAT boresight is 92.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250715621/quicklook/glg_skymap_all_bn250715621.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/bn250715621/quicklook/glg_healpix_all_bn250715621.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250715621/quicklook/glg_lc_medres34_bn250715621.gif