{
  "bibcode": "2016GCN.20308....1P",
  "body": "D. M. Palmer (LANL), S. D. Barthelmy (GSFC), J. R. Cummings (CPI),\nA. D'Ai (INAF-IASFPA), N. Gehrels (GSFC), H. A. Krimm (NSF/USRA), \nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), T. Sakamoto (AGU), \nM. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team): \n\n Using the data set from T-240 to T+962 sec from the recent telemetry downlink, \nwe report further analysis of BAT GRB 161219B (trigger #727541) \n(D'Ai, et al., GCN Circ. 20296). The BAT ground-calculated position is \nRA, Dec = 91.717, -26.801 deg which is \t\n \tRA(J2000) = 06h 06m 52.0s \n \tDec(J2000) = -26d 48' 02.1��� \nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). \nThe partial coding was 50%. \n\n The mask-weighted light curve shows a soft, weak peak at around T-10 sec,then the\nmain peak starts at T-2 sec, peaks at T+2 sec and decays to background by T+8 sec.\nT90 (15-350 keV) is 6.94 +- 0.79 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-0.54 to T+8.38 sec is best fit by a power law \nwith an exponential cutoff. This fit gives a photon index 1.29 +- 0.35, \n and Epeak of 61.9 +- 16.8 keV (chi squared 44.89 for 56 d.o.f.). For this \nmodel the total fluence in the 15-150 keV band is 1.5 +- 0.1 x 10^-6 erg/cm2 \nand the 1-sec peak flux measured from T+1.56 sec in the 15-150 keV band is \n5.3 +- 0.4 ph/cm2/sec. A fit to a simple power law gives a photon index \nof 1.84 +- 0.08 (chi squared 53.05 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/727541/BA/",
  "circularId": 20308,
  "createdOn": 1482258179000,
  "email": "hkrimm@nsf.gov",
  "subject": "GRB 161219B: Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NSF/NASA-GSFC  <hkrimm@nsf.gov>",
  "eventId": "GRB 161219B"
}