GCN Circular 38094
Subject
GRB 241104A: Fermi GBM Observation
Event
Date
2024-11-06T07:33:06Z (a year ago)
Edited On
2025-03-04T14:41:08Z (9 months ago)
From
Rushikesh Digambar Sonawane PHD231014 at IISER, TVM <rushikesh23@iisertvm.ac.in>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Rushikesh Digambar Sonawane PHD231014 at IISER, TVM <rushikesh23@iisertvm.ac.in>
Via
Web form
R. Sonawane (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/"