{
  "bibcode": "2012GCN.13634....1K",
  "body": "H. A. Krimm (GSFC/USRA), B. N. Barlow (PSU), S. D. Barthelmy (GSFC),\nT. Sakamoto (GSFC/UMBC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), \nN. Gehrels (GSFC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nG. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 120811C (trigger #530689)\n(Barlow, et al., GCN Circ. 13622).  The BAT ground-calculated position is\nRA, Dec = 199.690, 62.297 deg, which is \n   RA(J2000)  =  13h 18m 45.5s \n   Dec(J2000) = +62d 17' 50.3\" \nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 89%.\n \nThe mask-weighted light curve shows a nearly symmetric peak starting at ~T-10 sec,\npeaking at ~T+6 sec, and ending at ~T+40 sec.  T90 (15-350 keV) is 26.8 +- 3.7 sec\n(estimated error including systematics).\n \nThe time-averaged spectrum from T-9.7 to T+42.9 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 1.40 +- 0.30, \nand Epeak of 42.9 +- 5.7 keV (chi squared 59.5 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 3.0 +- 0.3 x 10^-6 erg/cm2\nand the 1-sec peak flux measured from T+5.27 sec in the 15-150 keV band is\n4.1 +- 0.2 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 2.04 +- 0.06 (chi squared 74.5 for 57 d.o.f.).  All the quoted errors\nare at the 90% confidence level. \n \nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/530689/BA/",
  "circularId": 13634,
  "createdOn": 1344779022000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 120811C: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 120811C"
}