TITLE: GCN CIRCULAR NUMBER: 42293 SUBJECT: GRB 251015A: Fermi GBM Final Real-time Localization DATE: 25/10/15 16:19:34 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 16:08:49 UT on 15 Oct 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251015A (trigger 782237334.425736 / 251015673). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 355.1, Dec = -56.1 (J2000 degrees, equivalent to J2000 23h 40m, -56d 06'), with a statistical uncertainty of 1.0 degrees. The angle from the Fermi LAT boresight is 167.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251015673/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/bn251015673/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251015673/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/42293. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...