{
  "bibcode": "2008GCN..8589....1B",
  "body": "P. N. Bhat (UAH) and A.J. van der Horst (NASA/ORAU)\nreport on behalf of the Fermi GBM Team:\n\n\"At 21:34:09.06 UT on 26th November 2008, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB081126 (trigger 249428050 / 081126899) which was\nalso detected by the SWIFT-BAT (Margutti et al. 2008, GCN Circular 8554)\n \nThe angle from the Fermi LAT boresight is 18 degrees.\n\nThis burst was also independently detected by INTEGRAL SPI-ACS and\nKonus/Wind (Golenetskii et al., 2008, GCN Circular 8562).\n\nThe GBM light curve consists of two pulses separated by\nabout 30 s with almost no emission in between. There is\nalso a weak untriggered emission at about T0-20 s.\nThe burst duration (T90) is about 56 s (8-1000 keV).\nThe time-averaged spectrum of the first pulse from T0 s to T0+11 s is\nwell fit by a Band function with Epeak = 192 +/- 74 keV,\nalpha = -0.3 +/- 0.4, and beta = -1.6 +/- 0.1.(chi squared 547 for 487\nd.o.f.) \n\nSimilarly the second pulse from about 20 s to 40 s is also\nwell fit by a Band function with Epeak = 162 +/- 77 keV,\nalpha = -0.3 +/- 0.5, and beta = -1.6 +/- 0.1.\n(chi squared 539 for 487 d.o.f.). The time averaged spectrum of the\nentire burst is well fit by a Band function with Epeak = 176 +/- 84 keV,\nalpha = -0.3 +/- 0.5, and beta = -1.7 +/- 0.1. (chi squared 464 for 487\nd.o.f.)\n\nThe event fluences (8-1000 keV) in the two pulses are\n(2.7 +/- 0.8)E-07 erg/cm^2 and (1.9 +/- 0.8)E-07 erg/cm^2\nrespectively. The 1-sec peak photon fluxes in the 8-1000 keV\nband in the two pulses are 1.3+/- 0.4 ph/s/cm^2 and 1.0 +/- 0.4\nph/s/cm^2 respectively. The total event fluence (8-1000 keV) is\n(1.5 +/- 0.6)E-07 erg/cm^2. The 1-sec peak photon fluxes in the 8-1000 keV\nband in the two pulses are 0.7+/- 0.3 ph/s/cm^2\n \n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 8589,
  "createdOn": 1228152509000,
  "email": "Narayana.Bhat@nasa.gov",
  "subject": "GRB 081126: Fermi GBM detection",
  "submitter": "Narayana Bhat at U Alabama/Huntsville/GBM  <Narayana.Bhat@nasa.gov>",
  "eventId": "GRB 081126"
}