{
  "bibcode": "2007GCN..6290....1S",
  "body": "T. Sakamoto (GSFC/ORAU), L. Barbier (GSFC), S. D. Barthelmy (GSFC),\nJ. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC),\nH. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL),\nA. Parsons (GSFC), P. Romano (Univ. Bicocca & INAF-OAB),\nG. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC)\non behalf of the Swift-BAT team:\n\nUsing the data set from T-239.3 to T+962.8 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 070412\n(trigger #275119)  (Romano, et al., GCN Circ. 6273).  The BAT\nground-calculated position is RA, Dec = 181.525, 40.133 deg which is\n    RA(J2000) = 12h 06m 6.1s\n    Dec(J2000) = 40d 07' 57.0\"\nwith an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 98%.\n\nThe mask-weighted light curve shows a double-peaked structure\nwith the first peak from approximately T-4 sec to T+10 sec and\na second 2-sec long peak at T+30 sec.  T90 (15-350 keV) is\n34 +- 2 sec (estimated error including systematics). The spacecraft\nslewed away from the burst location at T+122 sec, although the burst\nremained in the partially coded field of view until T+716 sec,\nwhen the spacecraft slewed away again.\n\nThe time-averaged spectrum from T-4.1 to T+31.2 is best fit by\na simple power-law model.  The power law index of the time-averaged\nspectrum is 1.45 +- 0.20. The fluence in the 15-150 keV band is\n4.8 +- 0.7 x 10^-7 erg/cm2.  The 1-sec peak photon flux measured\nfrom T+5.32 sec in the 15-150 keV band is 0.7 +- 0.1 ph/cm2/sec.\nAll the quoted errors are at the 90% confidence level.",
  "circularId": 6290,
  "createdOn": 1176385166000,
  "email": "krimm@milkyway.gsfc.nasa.gov",
  "subject": "GRB 070412, Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NASA-GSFC  <krimm@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 070412"
}