{
  "bibcode": "2018GCN.22862....1K",
  "body": "H. A. Krimm (NSF/USRA), S. D. Barthelmy (GSFC),  J. R. Cummings (CPI), \nP. A. Evans (U Leicester),  A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. 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+526 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 180626A (trigger #844615)\n(Evans, et al., GCN Circ. 22850).  The BAT ground-calculated position is\nRA, Dec = 243.569, 14.759 deg which is \n   RA(J2000)  =  16h 14m 16.6s \n   Dec(J2000) = +14d 45' 32.8\" \nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 35%.\n\nThe mask-weighted light curve shows a multi-peaked structure.  The first peak \nis from approximately T-10 to T+5 sec, with a second overlapping peak from T+5 \nto T+20 sec, followed by a weaker peak from T+20 to T+30 sec.\nT90 (15-350 keV) is 30.07 +- 1.42 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-10.01 to T+25.59 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 1.64 +- 0.27, \nand Epeak of 47.7 +- 12.2 keV (chi squared 40.18 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 4.8 +- 0.2 x 10^-6 erg/cm2\nand the 1-sec peak flux measured from T-3.69 sec in the 15-150 keV band is\n4.1 +- 0.4 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 2.01 +- 0.06 (chi squared 46.26 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/844615/BA/",
  "circularId": 22862,
  "createdOn": 1530045666000,
  "email": "hkrimm@nsf.gov",
  "subject": "GRB 180626A: Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NSF/NASA-GSFC  <hkrimm@nsf.gov>",
  "eventId": "GRB 180626A"
}