{
  "bibcode": "2016GCN.19581....1B",
  "body": "E. Burns (UAH) reports on behalf of the Fermi GBM Team:\n\n\"At 22:40:16.28 UT on 25 June 2016, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 160625B for the first time\n(trigger 488587220 / 160625945).\n\nThe trigger resulted in an Autonomous Repoint Request (ARR)\nby the GBM Flight Software owing to the high peak flux of the GRB.\nThis ARR was accepted and the spacecraft slewed to the GBM in-flight\nlocation. The initial angle from the Fermi LAT boresight to\nthe GBM ground location is 40 degrees.\n\nAt 22:43:24.82 the Fermi LAT triggered on a bright\npulse from the same GRB (Dirirsa et al. 2016, GCN 19580). Owing to\nthe ARR the initial angle from the Fermi LAT boresight to the\nLAT position at LAT trigger time was 12 degrees.\n\nAt 22:51:16.03 GBM triggered again on GRB 160625B\n(trigger 488587880 / 160625952).\n\nGRB 160625B is distinct from the Swift BAT GRB 160625A\n(Maselli et al. 2016, GCN 19577).\n\nThe GBM light curve consists of multiple peaks over\napproximately 700 seconds. The first peak is soft with a\nduration of about 1 second. The main peak, corresponding\nto the LAT trigger, is about 25 seconds long and is very\nhard. The peak that triggered GBM for the second time is\nabout 30 seconds long and soft.\n\nStandard GBM temporal and spectral analysis is awaiting\ndownlink of the full dataset and will be reported when\navailable.\"",
  "circularId": 19581,
  "createdOn": 1466902418000,
  "email": "eb0016@uah.edu",
  "subject": "GRB 160625B: Fermi GBM initial observations",
  "submitter": "Eric Burns at U of Alabama  <eb0016@uah.edu>",
  "eventId": "GRB 160625B"
}