{
  "bibcode": "2020GCN.26859....1B",
  "body": "A. Belles (PSU) and E. Sonbas (Adiyaman Univ.)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 200122A\n82 s after the BAT trigger (Sonbas et al., GCN Circ. 26844).\nNo optical afterglow consistent with the XRT position\n(Osborne et al. GCN Circ. 26846)\nis detected in the initial UVOT exposures.\nPreliminary 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first\nfinding chart (FC) exposure and subsequent exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite_fc            82          232          147         >21.1\nu_fc               294          544          246         >20.9\nwhite               82         5672          627         >21.7\nv                  624         6083          352         >19.4\nb                  550         5467          333         >20.6\nu                  294         1844          363         >20.7\nw1                 674         1472           58         >20.1\nm2                6088         6276          186         >19.5\nw2                5678         5878          197         >20.3\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.03 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 26859,
  "createdOn": 1579735742000,
  "email": "mhs18@psu.edu",
  "subject": "GRB 200122A: Swift/UVOT Upper Limits",
  "submitter": "Mike Siegel at PSU/Swift MOC  <mhs18@psu.edu>",
  "eventId": "GRB 200122A"
}