TITLE: GCN CIRCULAR NUMBER: 35998 SUBJECT: GRB 240331A: Fermi GBM Final Real-time Localization DATE: 24/04/01 00:05:53 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 23:55:19 UT on 31 Mar 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240331A (trigger 733622124.6772 / 240331997). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 31.4, Dec = 0.9 (J2000 degrees, equivalent to J2000 02h 05m, 0d 54'), with a statistical uncertainty of 5.8 degrees. The angle from the Fermi LAT boresight is 62.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240331997/q... The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240331997/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240331997/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/35998. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...