{
  "bibcode": "2012GCN.13852....1S",
  "body": "M. Stamatikos (OSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC),\nH. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nJ. L. Racusin (NASA/GSFC), T. Sakamoto (AGU), G. Sato (ISAS),\nJ. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-60 to T+243 sec from recent telemetry downlinks,\nwe report further analysis of BAT GRB 121011A (trigger #535764)\n(Racusin, et al., GCN Circ. 13845).  The BAT ground-calculated position is\nRA, Dec = 260.204, 41.123 deg, which is \n   RA(J2000)  =  17h 20m 49.0s \n   Dec(J2000) = +41d 07' 22.4\" \nwith an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 32%.\n \nThe mask-weighted light curve shows a single pulse starting at ~T-9 sec,\npeaking at ~T+1 sec, and ending at ~T+110 or ~T+150 sec.\nT90 (15-350 keV) is 75.6 +- 12.7 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-7.45 to T+80.10 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 0.10 +- 0.73, \nand Epeak of 101.5 +- 42.2 keV (chi squared 40.6 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 2.7 +- 0.7 x 10^-6 erg/cm2\nand the 1-sec peak flux measured from T-0.69 sec in the 15-150 keV band is\n1.2 +- 0.3 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 1.20 +- 0.14 (chi squared 49.2 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/535764/BA/",
  "circularId": 13852,
  "createdOn": 1349990051000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 121011A, Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 121011A"
}