{
  "bibcode": "2017GCN.20968....1L",
  "body": "A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), P. D'Avanzo (INAF-OAB),\nN. Gehrels (GSFC), H. A. Krimm (NSF/USRA),\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 170330A (trigger #744773)\n(D'Avanzo et al., GCN Circ. 20944).  The BAT ground-calculated position is\nRA, Dec = 283.331, -13.458 deg which is\n  RA(J2000)  =  18h 53m 19.4s\n  Dec(J2000) = -13d 27' 29.2\"\nwith an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 46%.\n\nThe mask-weighted light curve shows a multi-peaked structure that lasts\nuntil ~T+126 s, with the main peak occurs around ~T-135 s. The burst came\ninto the BAT field of view at ~T-170 s during a pre-planned spacecraft slew.\nTherefore, the burst emission might have started before ~T-170 s.\nT90 (15-350 keV) is 144.73 +- 3.51 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-143.2 to T+126.2 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.38 +- 0.09.  The fluence in the 15-150 keV band is 5.6 +- 0.3 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T-134.71 sec in the 15-150 keV band\nis 4.5 +- 0.3 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/744773/BA/",
  "circularId": 20968,
  "createdOn": 1491027363000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 170330A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 170330A"
}