{
  "bibcode": "2021GCN.29435....1K",
  "body": "H. A. Krimm (NSF), S. D. Barthelmy (GSFC),\nS. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Sakamoto (AGU), M. Stamatikos (OSU),\nT. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 210207B (trigger #1031297)\n(Lien et al., GCN Circ. 29420).  The BAT ground-calculated position is\nRA, Dec = 270.614, 53.700 deg which is\n   RA(J2000)  =  18h 02m 27.3s\n   Dec(J2000) = +53d 42' 01.1\"\nwith an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 56%.\n\nThe mask-weighted light curve shows a multi-peaked structure that\nstarts at ~T0 and ends at ~T+106 s. The main peak occurs at ~T+43 s.\nT90 (15-350 keV) is 95.69 +- 4.52 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-0.25 to T+106.40 sec is best fit by a\nsimple\npower-law model.  The power law index of the time-averaged spectrum is\n1.20 +- 0.07.  The fluence in the 15-150 keV band is 4.3 +- 0.2 x 10^-6\nerg/cm2.\nThe 1-sec peak photon flux measured from T+43.16 sec in the 15-150 keV band\nis 3.1 +- 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/1031297/BA/",
  "circularId": 29435,
  "createdOn": 1612834190000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 210207B: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 210207B"
}