{
  "bibcode": "2015GCN.17524....1U",
  "body": "T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC),\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-60 to T+243 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 150301B (trigger #633180)\n(Lien, et al., GCN Circ. 17515).  The BAT ground-calculated position is\nRA, Dec = 89.159, -57.969 deg which is\n  RA(J2000)  =  05h 56m 38.3s\n  Dec(J2000) = -57d 58' 07.8\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 62%.\n\nThe mask-weighted light curve shows a single-peaked structure that starts at ~ T0,\npeaks at ~ T+3 s, and ends at ~ T+16 s. T90 (15-350 keV) is 12.44 +- 1.49 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T-0.34 to T+15.62 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.46 +- 0.07.  The fluence in the 15-150 keV band is 1.8 +- 0.1 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+3.65 sec in the 15-150 keV band\nis 3.0 +- 0.2 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/633180/BA/",
  "circularId": 17524,
  "createdOn": 1425273844000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 150301B: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 150301B"
}