{
  "bibcode": "2017GCN.20999....1P",
  "body": "D. M. Palmer (LANL), S. D. Barthelmy (GSFC),\r\nJ. R. Cummings (CPI), N. Gehrels (GSFC),\r\nH. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC),\r\nC. B. Markwardt (GSFC), T. Sakamoto (AGU),\r\nM. Stamatikos (OSU), E. Troja (NASA/GSFC/UMCP),\r\nT. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\r\n\r\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\r\nwe report further analysis of BAT GRB 170405A (trigger #745797)\r\n(Troja et al., GCN Circ. 20984).  The BAT ground-calculated position is\r\nRA, Dec = 219.824, -25.236 deg which is\r\n   RA(J2000)  =  14h 39m 17.8s\r\n   Dec(J2000) = -25d 14' 09.7\"\r\nwith an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).\r\nThe partial coding was 6%.\r\n\r\nThe burst was outside of the BAT calibrated field of view from T-134.3 s to T+56.7 s.\r\nThe mask-weighted light curve using the ���detection mask��� (which covers a broader\r\nfield of view, but is not well calibrated; see detail description in Markwardt et al. 2007)\r\nshows a multi-peaked structure that starts at ~T-30 s and ends at ~T+240 s. The\r\nmajor peak occurs at ~T+5 s. T90 (15-350 keV) is 164.7 +- 35.4 sec (estimated error\r\nincluding systematics).\r\n\r\nThe time-averaged spectrum from T+56.7 to T+242.5 sec (i.e., when the burst is in the\r\nBAT calibrated field of view) is best fit by a simple power-law model.  The power law\r\nindex of the time-averaged spectrum is 1.59 +- 0.12.  The fluence in the 15-150 keV\r\nband is 3.7 +- 0.3 x 10^-06 erg/cm2. All the quoted errors are at the 90% confidence\r\nlevel.\r\n\r\nThe results of the batgrbproduct analysis are available at\r\nhttp://gcn.gsfc.nasa.gov/notices_s/745797/BA/",
  "circularId": 20999,
  "createdOn": 1491535545000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 170405A, Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 170405A"
}