TITLE: GCN CIRCULAR NUMBER: 42044 SUBJECT: GRB 250930A: Fermi GBM Final Localization DATE: 25/10/01 17:22:07 GMT FROM: Eva MP <eva.palafox@gmail.com> The Fermi GBM team reports the detection of a likely LONG GRB "At 20:59:58.57 UT on 30 September 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250930A (trigger 780958803/250930875). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 336.97, Dec = -44.97 (J2000 degrees, equivalent to J2000 22h 27m, -44d 58'), with a statistical uncertainty of 3.27 degrees. The angle from the Fermi LAT boresight is 109 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250930875/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/bn250930875/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250930875/q..." View this GCN Circular online at https://gcn.nasa.gov/circulars/42044. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...