{
  "bibcode": "2017GCN.21271....1B",
  "body": "S. D. Barthelmy (GSFC), J. R. Cummings (CPI),\nH. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), F. E. Marshall (NASA/GSFC),\nD. M. Palmer (LANL), T. Sakamoto (AGU),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(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 170626A (trigger #758766)\n(Marshall et al., GCN Circ. 21264).  The BAT ground-calculated position is\nRA, Dec = 165.409, 56.479 deg which is\n  RA(J2000)  =  11h 01m 38.1s\n  Dec(J2000) = +56d 28' 45.4\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 96%.\n\nThe mask-weighted light curve shows a multi-peaked structure. The main\nemission starts at ~ T-1 s, peaks at ~T0, and ends at ~T+12 s. In addition,\nthere are some weak emissions that start prior to the main pulse at ~T-20 s,\nand another weak pulse at ~T+80 s. T90 (15-350 keV) is 12.94 +- 0.34 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T-21.34 to T+17.92 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 1.26 +- 0.14,\nand Epeak of 120.9 +- 31.0 keV (chi squared 51.05 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 8.2 +- 0.2 x 10^-6 erg/cm2\nand the 1-sec peak flux measured from T-0.06 sec in the 15-150 keV band is\n23.6 +- 0.6 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 1.60 +- 0.03 (chi squared 69.77 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/758766/BA/",
  "circularId": 21271,
  "createdOn": 1498528645000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 170626A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 170626A"
}