GCN Circular 37791

S. Bala (USRA), P. Veres (UAH) and C. Meegan (UAH) report on behalf of
the Fermi Gamma-ray Burst Monitor Team:

"At 22:27:42.03 UT on 13 October 2024, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 241013B (trigger 750551267/241013936).
which was also detected by Swift/BAT-GUANO(J. DeLaunay et al. 2024, GCN 37790
Not found
 
 
) and
SVOM/GRM (Y. Zhang et al. 2024, GCN 37785
Not found
 
 
) .

The angle from the Fermi LAT boresight is 69 degrees.

The GBM light curve consists of a single peak with smooth decay with a duration (T90)
of about 29 s (50-300 keV). The time-averaged spectrum
from T0-6.8 to T0+37.2 s is best fit by
a power law function with an exponential high-energy cutoff.
The power law index is -1.39 +/- 0.06 and the cutoff energy,
parameterized as Epeak, is 280 +/- 60 keV.

The event fluence (10-1000 keV) in this time interval is
(7.9 +/- 0.4)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+0.77 s in the 10-1000 keV band is 6.1 +/- 0.3 ph/s/cm^2.

A Band function fits the spectrum equally well with Epeak= 270 +/- 81 keV, 
alpha = -1.39 +/- 0.07 and beta = -2.31 +/- 0.56.

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/"