{
  "bibcode": "2025GCN.42175....1P",
  "submitter": "Eva MP <eva.palafox@gmail.com>",
  "circularId": 42175,
  "format": "text/plain",
  "subject": "GRB 251006A: Fermi GBM Observation",
  "body": "E. Palafox (INAOE), M. Godwin (UAH) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 13:27:35.03 UT on 06 October 2025, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 251006A (trigger 781450060/251006561),\nwhich was also detected by Swift/BAT-GUANO (J. DeLaunay et al. 2025, GCN 42144)\nand Glowbug (C. C. Cheung et al. 2025, GCN 42130).\nThe Fermi GBM on-ground location is consistent with the Swift/BAT-GUANO position.\n\nThe angle from the Fermi LAT boresight is 30 degrees.\n\nThe GBM light curve consists of one short emission with total duration (T90)\nof about 1.4 s (50-300 keV). The time-averaged spectrum\nfrom T0-0.3 to T0+0.3 s is best fit by\na Comptonized function with Epeak of 490 +/- 170 and alpha of -0.9 +/- 0.2. \n\nThe event fluence (10-1000 keV) in this time interval is\n(4.8 +/- 0.6)E-07 erg/cm^2. The 64-ms peak photon flux measured\nstarting from T0+0.0 s in the 10-1000 keV band is 7 +/- 1 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "submittedHow": "web",
  "eventId": "GRB 251006A",
  "createdOn": 1760022536302
}