{
  "bibcode": "2022GCN.32464....1G",
  "body": "J. D. Gropp (PSU), J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), A.P.\nBeardmore (U. Leicester), J.P. Osborne (U. Leicester), A. Melandri\n(INAF-OAB), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB) and P.A.\nEvans (U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the second optical\nafterglow candidate observed by MeerLICHT (de Wet et al. GCN Circ.\n32460) of the Fermi/GBM detected burst GRB 220810A (Fermi GBM team, GCN\n\n32455), collecting 4.9 ks of Photon Counting (PC) mode data between\nT0+156.3 ks and T0+180.2 ks. \n\nNo X-ray sources have been detected consistent with being within 9.9\narcsec of the MeerLICHT optical afterglow candidate position. The\n3-sigma upper limit in the field is 0.003 ct  s^-1, corresponding to a\n0.3-10 keV observed flux of 1.1e-13 erg cm^-2 s^-1 (assuming a typical\nGRB spectrum).\n\nThe results of the XRT-team automatic analysis of the XRT observations,\nincluding a position-specific upper limit calculator, are available at\nhttps://www.swift.ac.uk/ToO_GRBs/00021510.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 32464,
  "createdOn": 1660382901000,
  "email": "pae9@leicester.ac.uk",
  "subject": "GRB 220810A: Swift-XRT observations",
  "submitter": "Phil Evans at U of Leicester  <pae9@leicester.ac.uk>",
  "eventId": "GRB 220810A"
}