{
  "bibcode": "2012GCN.13002....1S",
  "body": "T. Sakamoto (GSFC/UMBC), C. Graziani (U of Chicago), J. R. Cummings (GSFC/UMBC),\nS. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL),\nN. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC),\nT. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n\nUsing the event data from T-220 to T+30 sec (T is the trigger time of the \nground code which is 01:55:30.8 UT), we report further analysis of GRB 120302A  \n(Sakamoto, et al., GCN Circ. 13000).  \n\nThe mask-weighted light curve created from the event data shows at least \ntwo peaks, the first starting and also peaking at ~T sec.  The second starts \nat ~T+10 sec, peaks at ~T+13 sec, and ends at ~T+20 sec.  Although there might \nbe another weak episode starting at ~T+20 sec, it is hard to say conclusively \nbecause the event data ends at T+30 sec.  From the BAT raw light curve, the \nduration of the event is 35-40 sec long.  \n\nThe spectrum extracted from T to T+30 sec is best fit by a simple \npower-law model.  The power law index of the spectrum is 1.4 +- 0.3 \n(90% confidence).  The fluence measured in this interval is 6.6 +- \n1.3 x 10^-7 erg/cm2 (15-150 keV) and 1-sec peak flux measured from \nT sec in the 15-150 keV band is 0.6 +- 0.3 ph/cm2/s.  All the quoted \nerros are at the 90% confidence level.  \n\nSwift ToO has been approved and the observation is on-going.",
  "circularId": 13002,
  "createdOn": 1330722683000,
  "email": "takanori@milkyway.gsfc.nasa.gov",
  "subject": "GRB 120302A, Swift-BAT refined analysis",
  "submitter": "Takanori Sakamoto at NASA/GSFC  <takanori@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 120302A"
}