{
  "bibcode": "2009GCN..9021....1O",
  "body": "Masanori Ohno (ISAS/JAXA), Sara Cutini (ASDC), Julie McEnery (NASA/GSFC),\nJim Chiang (SLAC/KIPAC), Elmar Koerding (AIM/Saclay) report on behalf of\nthe Fermi LAT team, and Alexander van der Horst (NASA/MSFC/ORAU) reports\non behalf of the Fermi GBM team.\n\n\"At 00:02:42.63 UT on 23 March 2009, the Fermi Gamma-Ray Burst Monitor\n(GBM) triggered and located GRB 090323 (trigger 259459364 / 090323002).\nThe GBM light curve consists of multiple peaks and has a duration of\n~150 seconds.\n\nThe Fermi Large Area Telescope (LAT) has significantly, with more than\n5 sigma, detected this GRB. Emission was observed in the LAT up to a few\nGeV. The high-energy emission commences several seconds after the GBM\ntrigger time, and we see marginal evidence in the LAT that it continues\nfor up to a couple of kilo-seconds.\n\nThe best LAT on-ground localization is found to be (RA,Dec=190.69, 17.08)\nwith a 68% (resp. 90%) containment radius of 0.09 deg (resp. 0.14,\nstatistical), and a systematic error less than 0.1 deg. The GBM on-ground\nlocalization is consistent with this LAT localization within statistical\nand systematic uncertainties.\n\nWe further report that the Fermi Observatory executed a maneuver following\nthis trigger and tracked the burst location for the next 5 hours, subject\nto Earth-angle constraints.\n\nFurther analysis is ongoing.\n\nThe points of contact for this burst are Masanori Ohno (LAT,\nohno@astro.isas.jaxa.jp) and Alexander van der Horst (GBM,\nAlexander.J.VanDerHorst@nasa.gov).\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\nof an international collaboration between NASA and DOE in the U.S.\nand many scientific institutions across France, Italy, Japan and Sweden.\n\nThis message can be cited.\"",
  "circularId": 9021,
  "createdOn": 1237843481000,
  "email": "Alexander.J.VanDerHorst@nasa.gov",
  "subject": "Fermi GBM and LAT detections of GRB 090323",
  "submitter": "Alexander van der Horst at NASA/MSFC  <Alexander.J.VanDerHorst@nasa.gov>",
  "eventId": "GRB 090323"
}