{
  "bibcode": "2015GCN.18580....1C",
  "body": "J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), N. Gehrels (GSFC),\nH. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nL. M. McCauley (PSU), D. M. Palmer (LANL), T. Sakamoto (AGU),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL) (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 151111A (trigger #663074)\n(McCauley, et al., GCN Circ. 18578).  The BAT ground-calculated position is\nRA, Dec = 56.850, -44.154 deg which is\n    RA(J2000)  =  03h 47m 24.0s\n    Dec(J2000) = -44d 09' 12.9\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 80%.\n\nThe mask-weighted light curve shows a single long FRED-shaped peak beginning at \nT-5 sec, peaking at T+0 sec and fading to background by T+140 sec.\nT90 (15-350 keV) is 76.93 +- 12.59 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-5.62 to T+91.35 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 0.79 +- 0.45,\nand Epeak of 56.6 +- 9.2 keV (chi squared 98.19 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 1.7 +- 0.1 x 10^-6 erg/cm2\nand the 1-sec peak flux measured from T+0.52 sec in the 15-150 keV band is\n1.0 +- 0.1 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 1.76 +- 0.00 (chi squared 115.24 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/663074/BA/",
  "circularId": 18580,
  "createdOn": 1447251830000,
  "email": "hans.a.krimm@nasa.gov",
  "subject": "GRB 151111A: Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NASA-GSFC  <hans.a.krimm@nasa.gov>",
  "eventId": "GRB 151111A"
}