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/q...

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/q...

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

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