{
  "bibcode": "2022GCN.32197....1M",
  "body": "C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC),\nS. B. Cenko (GSFC), H. A. Krimm (NSF),\nS. Laha (GSFC/UMBC), A. Y. Lien (U Tampa),\nD. M. Palmer (LANL), T. Parsotan (GSFC/UMBC),\nT. Sakamoto (AGU), M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 220611A (trigger #1110090)\n(Cenko et al., GCN Circ. 32191).  The BAT ground-calculated position is\nRA, Dec = 66.505, -37.265 deg which is\n   RA(J2000)  =  04h 26m 01.2s\n   Dec(J2000) = -37d 15' 54.2\"\nwith an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 70%.\n\nThe mask-weighted light curve shows a weak pulse that starts at ~T0\nand ends at ~T+60 s. There might be a possible precursor emission\n(~ 5 sigma in the 15-350 keV image) from ~T-90 s to ~T-85 s.\nT90 (15-350 keV) is 57.00 +- 12.37 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T+0.52 to T+61.52 sec is best fit\nby a simple power-law model.  The power law index of the time-averaged\nspectrum is 1.87 +- 0.29.  The fluence in the 15-150 keV band is\n6.7 +- 1.3 x 10^-7 erg/cm2. All the quoted errors are at\nthe 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1110090/BA/",
  "circularId": 32197,
  "createdOn": 1655159771000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 220611A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 220611A"
}