{
  "bibcode": "2021GCN.30989....1L",
  "body": "A. Y. Lien (U Tampa), S. D. Barthelmy (GSFC), J.D. Gropp (PSU),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),A. Y. Lien (U Tampa),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC/UMBC),\nT. Sakamoto (AGU), M. Stamatikos (OSU) (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 211024B (trigger #1081073)\n(Gropp, et al., GCN Circ. 30980).  The BAT ground-calculated position is\nRA, Dec = 154.708, 24.566 deg which is\n     RA(J2000)  =  10h 18m 49.9s\n     Dec(J2000) = +24d 33' 57.3\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 100%.\n\nThe mask-weighted light curve shows three episodes.  The first episode\nstarts from T-60 s, peaks at T+10 s and ends at T+100 s.  The second, and\nweakest, episode runs from T+250 to T+400 sec and the third episode starts\naround T+500 s, peaks at T+580 s and ends at T+620 s.  The burst came into\nthe BAT field of view around T-100 sec during a pre-planned slew.\nT90 (15-350 keV) is 603.5 +- 20.7 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-56.37 to T+613.08 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.63 +- 0.09.  The fluence in the 15-150 keV band is 6.8 +- 0.3 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+5.17 sec in the 15-150 keV band\nis 0.9 +- 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/1081073/BA/",
  "circularId": 30989,
  "createdOn": 1635167016000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "GRB 211024B: Swift-BAT refined analysis",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>",
  "eventId": "GRB 211024B"
}