{
  "bibcode": "2017GCN.22139....1S",
  "body": "M. Stamatikos (OSU), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), H. A. Krimm (NSF/USRA),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Sakamoto (AGU),\nA. Tohuvavohu (PSU), T. N. Ukwatta (LANL)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 171120A (trigger #791201)\n(Tohuvavohu et al., GCN Circ. 22133).  The BAT ground-calculated position is\nRA, Dec = 163.774, 22.461 deg which is\n   RA(J2000)  =  10h 55m 05.8s\n   Dec(J2000) = +22d 27' 38.2\"\nwith an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 14%.\n\nThe mask-weighted light curve shows a multi-peaked structure that starts\nat ~T-15 s and ends at ~T+65 s. The two main peaks occur at ~T0 and ~T+40 s,\nrespectively. T90 (15-350 keV) is 64 +- 16 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-15.53 to T+64.47 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 1.06 +- 0.28,\nand Epeak of 86.0 +- 19.0 keV (chi squared 55.57 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 8.6 +- 0.3 x 10^-6 erg/cm2\nand the 1-sec peak flux measured from T+39.97 sec in the 15-150 keV band is\n11.4 +- 0.5 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 1.67 +- 0.06 (chi squared 70.86 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/791201/BA/",
  "circularId": 22139,
  "createdOn": 1511237971000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 171120A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 171120A"
}