TITLE: GCN CIRCULAR NUMBER: 35549 SUBJECT: GRB 240115B: Fermi GBM Detection DATE: 24/01/16 20:10:53 GMT FROM: sumanbala2210@gmail.com R. Hamburg (CNRS/IN2P3), S. Bala (USRA), and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 16:45:37.62 UT on 15 January 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240115B (trigger 727029942/240115698). GRB 240115B was also localized by INTEGRAL (S. Mereghetti et al. 2024, GCN 35541). The angle from the Fermi LAT boresight is 97 degrees. The GBM light curve consists of multiple peaks of emission with a duration (T90) of about 163 s (50-300 keV). The time-averaged spectrum from T0-26.63 s to T0+47.11 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.73 +/- 0.11, and the cutoff energy parameterized as Epeak, is 125 +/- 10. The event fluence (10-1000 keV) in this time interval is (5.13 +/- 0.26)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+17.6 s in the 10-1000 keV band is 2.6 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/" View this GCN Circular online at https://gcn.nasa.gov/circulars/35549. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...