{
  "bibcode": "2009GCN.10146....1B",
  "body": "J. Michael Burgess (UAH) and Sylvain Guiriec (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 19:52:26.86 UT on 30 October 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 091030 (trigger 278625148 / 091030828).\n\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 41.67, DEC = 21.54 (J2000 degrees,\nequivalent to 17h 40m 12, 21d 32'), with an uncertainty\nof 1.2 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which is currently estimated to be 2 to 3 degrees).\nThe angle from the Fermi LAT boresight is 100 degrees.\n\nThe GBM light curve consists of 2 bright peaks followed\nby 2 dimmer peaks.\nwith a duration (T90) of about 160 s (8-1000 keV).\nThe time-averaged spectrum from T0-1.7 s to T0+40 s is\nbest fit by a Band function with Epeak = 507 +/- 30 keV,\nalpha = -0.88 +/- 0.02, and beta = -2.2 +/- 0.1 (castor C-stat 626 for  \n478 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(3.03 +/- 0.043) E-5 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+17.54 s in the 8-1000 keV band\nis 9.58 +/- 0.23 ph/s/cm^2.\n\nThe spectral and temporal analysis results presented above are  \npreliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 10146,
  "createdOn": 1257783941000,
  "email": "james.burgess@uah.edu",
  "subject": "GRB 091030: Fermi GBM detection",
  "submitter": "Michael Burgess at UAH  <james.burgess@uah.edu>",
  "eventId": "GRB 091030"
}