{
  "bibcode": "2010GCN.10744....1B",
  "body": "P. N. Bhat (UAH)  \nreport on behalf of the Fermi GBM Team:\n\n\"At 00:49:56.23 UT on 11 May 2010, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 100511A (trigger 295231798 / 100511035).\nThe Fermi Observatory executed a maneuver following this trigger and\ntracked the burst location for the next 5 hours, subject to\nEarth-angle constraints.\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 109.29, DEC = -4.65 (J2000 degrees,\nequivalent to 07 h 17.2 m, -4 d 39 '), with an uncertainty\nof 1.0 degree (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which is currently estimated to be 2 to 3 degrees).\n \nThe angle from the Fermi LAT boresight is 43 degrees.\n\nThe GBM light curve shows several pulses\nwith a duration (T90) of about 38 s (50-300 keV).\nThe time-averaged spectrum from T0-7.4 s to T0+52 s is\nadequately fit by a power law function with an exponential\nhigh energy cutoff.  The power law index is -1.32 +/- 0.02 and\nthe cutoff energy, parameterized as Epeak, is\n946.6 (+134/-110) keV\n\n(C-stat 1777 for 863 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(7.08 +/- 0.05)E-06 erg/cm^2. The 1-sec peak photon flux\nmeasured starting from T0+25 s in the 8-1000 keV band\nis 8.81 +/- 0.18 ph/s/cm^2.\n\nA Band function fits the spectrum equally well\n(C-stat 1776 for 862 d.o.f.) with Epeak= 882.5 +166/-115 keV,\nalpha = -1.3 +/- 0.02 and beta = -2.43 (+0.24/-1.71).\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 10744,
  "createdOn": 1273683065000,
  "email": "Narayana.Bhat@nasa.gov",
  "subject": "GRB 100511A: Fermi GBM detection/observation",
  "submitter": "Narayana Bhat at U Alabama/Huntsville/GBM  <Narayana.Bhat@nasa.gov>",
  "eventId": "GRB 100511A"
}