GCN Circular 37813
Subject
GRB 241016B: Fermi GBM Observations
Date
2024-10-18T13:32:44Z (6 days ago)
From
Elisabetta Bissaldi at Politecnico and INFN Bari <elisabetta.bissaldi@ba.infn.it>
Via
Web form
E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH)
report on behalf of the Fermi Gamma-ray Burst Monitor Team:
"At 11:12:40.13 UT on 16 October 2024, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 241016B (trigger 750769965/241016467),
which was also detected by SVOM/GRM (Zhang et al. 2024, GCN 37803)
and by Swift/BAT-GUANO (DeLaunay et al. 2024, GCN 37806).
The angle from the Fermi LAT boresight is 86 degrees.
The GBM light curve consists of two peaks with a duration (T90)
of about 0.8 s (50-300 keV). The time-averaged spectrum
from T0-0.6s to T0+0.7s is best fit by
a power law function with an exponential high-energy cutoff.
The power law index is 0.0 +/- 0.5 and the cutoff energy,
parameterized as Epeak, is 840 +/- 380 keV.
The event fluence (10-1000 keV) in this time interval is
(4.1 +/- 0.5)E-07 erg/cm^2. The 64-msec peak photon flux measured
starting from T0-0.064 s in the 10-1000 keV band is 6.4 +/- 0.7 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/"