{
  "body": "O. Mukherjee (USRA) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 19:51:31.93 UT on 06 February 2025, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 250206A (trigger 760564296/250206827).\nwhich was also detected by Fermi-LAT (Gupta et al. 2025, GCN 39233) and Konus-Wind (Ridnaia et al. 2025, GCN 39283).\nThe Fermi GBM on-ground location is consistent with the Fermi-LAT position.\n\nThe angle from the Fermi LAT boresight is 33 degrees.\n\nThe GBM light curve consists of a multipeaked emission episode followed by a single peaked emission episode with a duration (T90)\nof about 64.3 s (50-300 keV). The time-averaged spectrum\nfrom T0-2.0 to T0+79.9 s is best fit by\na Band function with Epeak = 187 +/- 8 keV,\nalpha = -0.73 +/- 0.04, and beta = -2.6 +/- 0.2.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.66 +/- 0.05)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+1.7 s in the 10-1000 keV band is 10.4 +/- 0.3 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/\"",
  "bibcode": "2025GCN.39290....1M",
  "circularId": 39290,
  "submitter": "oindabimukherjee@gmail.com",
  "createdOn": 1739306689978,
  "eventId": "GRB 250206A",
  "submittedHow": "web",
  "subject": "GRB 250206A: Fermi GBM Observation",
  "format": "text/plain"
}