{
  "bibcode": "2010GCN.10548....1D",
  "body": "Francesco de Palma (INFN and Universit� di Bari),Takeshi Uehara \n(Hiroshima University), Johan Bregeon (INFN Pisa), Veronique Pelassa\n(CNRS/IN2P3/LPTA), Jim Chiang (SLAC), Fred Piron (LPTA), Nicola Omodei\n(Stanford) report on behalf of the Fermi LAT collaboration:\n\nAt 06:36:08.02 UT on 25 March 2010, the Fermi Large Area Telescope (LAT)\ndetected gamma rays from the GRB 100325A, which was triggered and \nlocated by the Fermi Gamma-ray Burst Monitor (GBM)\n(trigger 291191770/100325.275,GCN10546). The angle of the GBM position\nposition with respect to the LAT boresight was ~9.2 degrees at the time\nof the LAT detection, close to the center of the LAT field of view.\n\nThe data from the Fermi LAT shows a weak increase in the event rate\nthat is spatially and temporally correlated with the GBM emission.\nIt is a relatively weak detection (~>4 sigma) with 4 photons above\n100 MeV within 9 seconds after the GBM trigger.\nThe highest energy photon has an energy just above 800 MeV.\n\nThe best LAT on-ground localization is found to be (RA, Dec = 330.24,\n-26.47) (J2000) with a 90% containment radius of 0.9 deg \n(statistical; 68% containment radius: 0.6 deg) which is consistent with \nthe GBM localization. The observed flux (100 MeV-300 GeV) from this \nlocation is 1.18 +/- 0.76 e-04 (ph/cm^2/s).\n\nFurther analysis is ongoing.\n\nThe point of contact for this burst is Francesco de Palma\n(francesco.depalma@ba.infn.it)\n\nThe Fermi LAT is a pair conversion telescope designed to cover the\nenergy band from 20 MeV to greater than 300 GeV. It is the product of\nan international collaboration between NASA and DOE in the U.S. and \nmany scientific institutions across France, Italy, Japan and Sweden.",
  "circularId": 10548,
  "createdOn": 1269727794000,
  "email": "francesco.depalma@ba.infn.it",
  "subject": "GRB 100325A: Fermi LAT detection",
  "submitter": "Francesco de Palma at U of INFN Bari  <francesco.depalma@ba.infn.it>",
  "eventId": "GRB 100325A"
}