{
  "bibcode": "2021GCN.30622....1D",
  "body": "V. D'Elia (ASI-SSDC & INAF-OAR) and S.B. Cenko (GSFC) report on behalf of the Swift-XRT team:\n\n\nSwift-XRT has performed further follow-up observations of the Fermi burst (Longo et al., GCN Circ. 30589; Roberts et al., GCN Circ. 30590).\n\nThe possible afterglow reported in Sbarufatti et al. (GCN Circ. 30591, \"source 7\") is no longer detected in a 4 ks observation, down to a three sigma upper limit of 4.8E-3 cts/s (corresponding to 1.28E-13 erg/cm^2/s) at the position of the transient. This value is significantly below the previously reported flux value for the candidate, thus confirming ���source 7��� as the afterglow of GRB 210802A.\n\nThe results of the full analysis of the XRT observations are available at https://www.swift.ac.uk/xrt_curves/00021456/.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 30622,
  "createdOn": 1628517333000,
  "email": "valerio.delia@ssdc.asi.it",
  "subject": "GRB 210802A: Further Swift/XRT observation and afterglow confirmation",
  "submitter": "Valerio D'Elia at ASDC  <valerio.delia@ssdc.asi.it>",
  "eventId": "GRB 210802A"
}