{
  "bibcode": "2020GCN.28258....1D",
  "body": "P. D'Avanzo (INAF-OAB) and A. Y. Lien (GSFC/UMBC)\nreport on behalf of the Swift team:\n\nUsing the full data set from recent downlinks, we report further ground\ndata analysis for Swift trigger 989458 (Bernardini et al. GCN Circ. 28250).\n\nThe BAT analysis uses data from T-61 to T+242 sec. The BAT image\nsignificance has now decreased to 4.8 sigma (15-350 keV). Also, the\nmask-weighted light curve does not show anything significant.\n\nGround analysis of the 0.3 ks of XRT PC mode data confirms that no XRT\ncounterpart is detected in the BAT error circle.\n\nWe thus conclude that this trigger was due to detector noise.",
  "circularId": 28258,
  "createdOn": 1597680335000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "Swift Trigger 989458 is due to detector noise",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>"
}