GCN Circular 38247

C. de Barra (University College Dublin), M. Dafčíková (Masaryk U.), and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team:

"At 13:18:24.73 UT on 15 November 2024, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 241115A (trigger 753369509/241115554).
which was also detected by Swift BAT (M. A. Williams et al. 2024, GCN 38235
Not found
 
 
).
The Fermi GBM on-ground location is consistent with the Swift BAT position.

The angle from the Fermi LAT boresight is 46 degrees.

The GBM light curve consists of a single emission episode with a duration (T90)
of about 3.1 s (50-300 keV). The time-averaged spectrum
from T0-3.4 to T0+5.8 s is best fit by
a power law function with an exponential high-energy cutoff.
The power law index is -0.7 +/- 0.1 and the cutoff energy,
parameterized as Epeak, is 90 +/- 7 keV.

The event fluence (10-1000 keV) in this time interval is
(1.57 +/- 0.08)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+0.32 s in the 10-1000 keV band is 7.7 +/- 0.3 ph/s/cm^2.

A Band function fits the spectrum equally well
with Epeak= 80 +/- 9 keV, alpha = -0.6 +/- 0.2 and beta = -2.7 +/- 0.4.

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/"