{
  "bibcode": "2022GCN.32469....1G",
  "body": "J. D. Gropp (PSU), J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), A.P. Beardmore (U. Leicester), \nJ.P. Osborne (U. Leicester), A. Melandri (INAF-OAB), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB) \nand P.A.  Evans (U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the first optical afterglow candidate observed by \nMeerLICHT (de Wet et al. GCN Circ. 32460) of the Fermi/GBM detected burst GRB 220810A \n(Fermi GBM team, GCN 32455), collecting 2.0 ks of Photon Counting (PC) mode data between \nT0+202.1 ks and T0+208.1 ks. \n\nNo X-ray sources have been detected at the MeerLICHT optical afterglow candidate position. \nThe 3-sigma upper limit in the field is 0.006 ct  s^-1, corresponding to a 0.3-10 keV observed flux \nof 2.2e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum).\n\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 32469,
  "createdOn": 1660465856000,
  "email": "pda.davanzo@gmail.com",
  "subject": "GRB 220810A: Further Swift-XRT observations",
  "submitter": "Paolo D'Avanzo at INAF-OAB  <pda.davanzo@gmail.com>",
  "eventId": "GRB 220810A"
}