TITLE: GCN CIRCULAR NUMBER: 38094 SUBJECT: GRB241104A: Fermi GBM Observation DATE: 24/11/06 07:33:06 GMT FROM: Rushikesh Digambar Sonawane PHD231014 at IISER, TVM rushikesh23@iisertvm.ac.in
S. Rushikesh (IISER, TVM), U. Pathak (IITB), O. Mukherjee (USRA), S. Bala (USRA) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team:
"At 18:30:15.42 UT on 04 November 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB241104A (trigger 752437820/241104771) which was also detected by EP/WXT (Zhou et al. 2024, GCN 38081), SVOM/VT (Qiu et al. 2024, GCN 38086) and SVOM/ECLAIRs (Schanne et al. 2024, GCN 38078). The Fermi GBM on-ground location is consistent with the EP/WXT position.
The angle from the Fermi LAT boresight is 62 degrees.
The GBM light curve consist of single pulse with multiple peaks with a duration (T90) of about 10.5 s (50-300 keV). The time-averaged spectrum from T0-7.6 to T0+11.8 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.69 +/- 0.08 and the cutoff energy, parameterized as Epeak, is 74 +/- 2 keV.
The event fluence (10-1000 keV) in this time interval is (3.4 +/- 0.8)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+2.6 s in the 10-1000 keV band is 6.9 +/- 0.3 ph/s/cm^2.
A Band function fits the spectrum equally well with Epeak= 68 +/- 3 keV, alpha = -0.6 +/- 0.1 and beta = -3.0 +/- 0.3.
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/38094. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...