{
  "bibcode": "2011GCN.11945....1K",
  "body": "GRB 110420A: Swift-BAT refined analysis\n \nH. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), V. Mangano (INAF-IASFPA),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC),\nM. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-61 to T+242 sec from recent telemetry downlinks,\nwe report further analysis of BAT GRB 110420A (trigger #451757)\n(Mangano, et al., GCN Circ. 11941).  The BAT ground-calculated position is\nRA, Dec = 2.164, -37.877 deg which is \n   RA(J2000)  =  00h 08m 39.3s \n   Dec(J2000) = -37d 52' 35.5\" \nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 15%.\n \nThe mask-weighted light curve shows a single peak with some structure\nstarting at ~T-15 sec, peaking at ~T+8 sec, and ending at ~T+35 sec.\nT90 (15-350 keV) is 11.8 +- 0.9 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-0.1 to T+16.0 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.30 +- 0.07.  The fluence in the 15-150 keV band is 5.9 +- 0.2 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+8.04 sec in the 15-150 keV band\nis 14.0 +- 0.9 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/451757/BA/",
  "circularId": 11945,
  "createdOn": 1303343985000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 110420A: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 110420A"
}