{
  "bibcode": "2016GCN.18944....1B",
  "body": "S. D. Barthelmy (GSFC), A. Amaral-Rogers (U Leicester),\nJ. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC),\nH. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Sakamoto (AGU), M. Stamatikos (OSU),\nT. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 160127A (trigger #671828)\n(Amaral-Rogers et al., GCN Circ. 18938).  The BAT ground-calculated position is\nRA, Dec = 225.966, 0.080 deg which is\n  RA(J2000)  =  15h 03m 51.8s\n  Dec(J2000) = +00d 04' 46.7\"\nwith an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 41%.\n\nThe mask-weighted light curve shows a double-peaked structure that starts\nat ~ T-1 s and ends at ~ T+6 s. The two peaks occur at ~ T+1 and ~T+3 s,\nrespectively. T90 (15-350 keV) is 6.16 +- 0.94 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-1.44 to T+5.70 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 0.99 +- 1.11,\nand Epeak of 25.6 +- 0.0 keV (chi squared 44.15 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 3.3 +- 0.5 x 10^-7 erg/cm2\nand the 1-sec peak flux measured from T+3.34 sec in the 15-150 keV band is\n1.4 +- 0.3 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 2.43 +- 0.23 (chi squared 50.23 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/671828/BA/",
  "circularId": 18944,
  "createdOn": 1453920490000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 160127A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 160127A"
}