GRB 231028A: Fermi GBM Detection
Abstract
"At 04:09:06.66 UT on 28 October 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231028A (trigger 720158951/231028173), which was also detected by the Swift/BAT (Williams et al. 2023, GCN 34894). The Fermi GBM Final Real-time Localization (GCN 34893) is consistent with the Swift position. The GBM light curve consists of multiple peaks with a duration (T90) of about 34.8 s (50-300 keV). The time-averaged spectrum from T0-4.1 to T0+43.0 s is best fit by a Band function with Epeak = 157 +/- 11 keV, alpha = -0.72 +/- 0.06, and beta = -2.13 +/- 0.08. The event fluence (10-1000 keV) in this time interval is (1.95 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+4.0 s in the 10-1000 keV band is 14.8 +/- 0.4 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/"
- Publication:
-
GRB Coordinates Network
- Pub Date:
- October 2023
- Bibcode:
- 2023GCN.34899....1V