{
  "bibcode": "2020GCN.27793....1U",
  "body": "T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), P. A. Evans (U Leicester),\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) (i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry\ndownlink,\nwe report further analysis of BAT GRB 200522A (trigger #973628)\n(Evans et al., GCN Circ. 27778).  The BAT ground-calculated position is\nRA, Dec = 5.668, -0.264 deg which is\n   RA(J2000)  =  00h 22m 40.3s\n   Dec(J2000) = -00d 15' 49.9\"\nwith an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 86%.\n\nThe mask-weighted light curve shows a multi-peaked structure that starts\nat ~ T-0.3 s and ends at ~T+0.7 s. The main peak occur at ~T0. T90 (15-350\nkeV)\nis 0.62 +- 0.08 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-0.02 to T+0.67 sec is best fit by\na simple power-law model.  The power law index of the time-averaged\nspectrum is 1.45 +- 0.17.  The fluence in the 15-150 keV band is\n1.1 +- 0.1 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from\nT-0.17 sec in the 15-150 keV band is 1.5 +- 0.2 ph/cm2/sec.  All the\nquoted errors are at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/973628/BA/",
  "circularId": 27793,
  "createdOn": 1590268463000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 200522A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 200522A"
}