{
  "bibcode": "2021GCN.30625....1B",
  "body": "S. D. Barthelmy (GSFC), J. R. Cummings (CPI),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Sakamoto (AGU),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(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 210807C (trigger #1064421)\n(Lien et al., GCN Circ. 30610).  The BAT ground-calculated position is\nRA, Dec = 143.540, -51.409 deg which is\n   RA(J2000)  =  09h 34m 09.7s\n   Dec(J2000) = -51d 24' 32.8\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 20%.\n\nThe BAT light curve showed a complex structure with a duration of about ~100 sec.\nT90 (15-350 keV) is 89.97 +- 6.26 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-31.36 to T+78.57 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.65 +- 0.06.  The fluence in the 15-150 keV band is 1.2 +- 0.0 x 10^-05 erg/cm2.\nThe 1-sec peak photon flux measured from T-24.22 sec in the 15-150 keV band\nis 4.0 +- 0.7 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/1064421/BA/",
  "circularId": 30625,
  "createdOn": 1628632699000,
  "email": "sibasish.laha@nasa.gov",
  "subject": "GRB 210807C: Swift-BAT refined analysis",
  "submitter": "Sibasish Laha at GSFC  <sibasish.laha@nasa.gov>",
  "eventId": "GRB 210807C"
}