{
  "bibcode": "2020GCN.26699....1E",
  "body": "P.A. Evans (U. Leicester), A. Tohuvavohu (U. Toronto), J.A. Kennea (PSU)\nand S.B. Cenko (GSFC) report on behalf of the Swift/XRT team:\n\nSwift performed a series of 19 observations tiling the sky area of the \nFermi-LAT / ANTARES coincident event ANTARES 200108A (Turley et al., GCN \nCirc. 26674). The observations were centred on RA=02h 49m 56.5s, \nDec=-18d 05' 17\", with a radius of ~50', and were carried out between \n22:53:41 UT on Jan 8 until 00:37:14 UT on Jan 9; the detection of GRB \n200109A subsequently interrupted the campaign. We gathered between 30 s \nand 150 s of exposure per tile, with the typical exposure being 110 s.\n\nNo X-ray sources were found, with a typical upper limit of 0.06 ct/sec \n(0.3-10 keV).\n\nAssuming a standard AGN spectrum (NH=3e20, Gamma=1.7) this corresponds \nto a 0.3-10 keV observed flux of 2.6 x 10^-12 erg/cm^-2 s^-1.",
  "circularId": 26699,
  "createdOn": 1578673182000,
  "email": "pae9@leicester.ac.uk",
  "subject": "ANTARES 200108A: No detection by Swift-XRT",
  "submitter": "Phil Evans at U of Leicester  <pae9@leicester.ac.uk>",
  "eventId": "ANTARES 200108A"
}