TITLE: GCN CIRCULAR NUMBER: 38421 SUBJECT: GRB 241130A: Fermi GBM Detection DATE: 24/12/02 18:25:13 GMT FROM: Vidushi Sharma at NASA GSFC/UMBC vidushi.sharma@nasa.gov
V Sharma (NASA GSFC/UMBC), O.J. Roberts (NASA/MSFC) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team:
"At 23:13:45.38 UT on 30 November 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241130A (trigger 754701230/241130968).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 100.29, Dec = -26.38 (J2000 degrees, equivalent to J2000 6h 41m, -26d 22'), with a statistical uncertainty of 1.00 degrees. (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a mixture of two Gaussians, one with a radius of 1.8 degrees (52% contribution) and one with a radius of 4.1 degrees (47% contribution) [A. Goldstein et al. 2020, ApJ, 895, 1]).
The angle from the Fermi LAT boresight is 95 degrees.
The GBM light curve consists of a single emission episode with a duration (T90) of about 4.6 s (50-300 keV). The time-averaged spectrum from T0+0 to T0+4.544 s is best fit by a Band function with Epeak = 320 +/- 30 keV, alpha = -0.92 +/- 0.04, and beta = -2.04 +/- 0.07.
The event fluence (10-1000 keV) in this time interval is (1.09 +/- 0.02)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.22 s in the 10-1000 keV band is 33.6 +/- 0.5 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/"
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