{
  "bibcode": "2007GCN..6753....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), F. E. Marshall (GSFC),\nD. Palmer (LANL), A. Parsons (GSFC), G. Sato (GSFC/ISAS),\nM. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+303 sec from recent telemetry\ndownlinks, we report further analysis of BAT GRB 070810B (trigger\n#287409) (Marshall, et al., GCN Circ. 6743).  The BAT ground-calculated\nposition is RA, Dec = 8.952, 8.822 deg which is\n    RA(J2000) = 0h 35m 48.4s\n    Dec(J2000) = 8d 49' 18\"\nwith an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 100%.\n\nThe light curve is a single FRED-like peak starting at T+0, and ending\nat T+0.12 sec.  T90 (15-350 keV) is 80 +- 10 msec (estimated error \nincluding systematics).\n\nThe time-averaged spectrum from T+0.008 to T+0.092 sec is best fit by a\nsimple power-law model.  The power law index of the time-averaged\nspectrum is 1.44 +- 0.37.  The fluence in the 15-150 keV band is\n1.2 +- 0.3 x 10^-8 erg/cm2. The 1-sec peak photon flux measured from \nT-0.45 sec in the 15-150 keV band is 1.8 +- 0.4 ph/cm2/sec.  All the \nquoted errors are at the 90% confidence level.",
  "circularId": 6753,
  "createdOn": 1186791580000,
  "email": "craigm@milkyway.gsfc.nasa.gov",
  "subject": "GRB 070810B, Swift-BAT refined analysis",
  "submitter": "Craig Markwardt at NASA/GSFC/UMD  <craigm@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 070810B"
}