{
  "bibcode": "2012GCN.13039....1S",
  "body": "M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL),\nN. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS),\nJ. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 120311A (trigger #517469)\n(Markwardt, et al., GCN Circ. 13032).  The BAT ground-calculated position is\nRA, Dec = 273.075, 14.297 deg which is\n    RA(J2000)  =  18h 12m 18.1s\n    Dec(J2000) = +14d 17' 49.0\" \nwith an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 71%.\n\nThe mask-weighted light curve shows a single gradual-rise exponential-decay\npeak.  T90 (15-350 keV) is 3.5 +- 0.8 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-1.38 to T+3.22 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.30 +- 0.15.  The fluence in the 15-150 keV band is 3.0 +- 0.3 x 10^-07 erg/cm2.\nThe 1-sec peak photon flux measured from T-0.07 sec in the 15-150 keV band\nis 3.2 +- 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/517469/BA/",
  "circularId": 13039,
  "createdOn": 1331482039000,
  "email": "craigm@milkyway.gsfc.nasa.gov",
  "subject": "GRB 120311A, Swift-BAT refined analysis",
  "submitter": "Craig Markwardt at NASA/GSFC  <craigm@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 120311A"
}