{
  "bibcode": "2020GCN.27165....1S",
  "body": "M. H. Siegel (PSU) and A. Y. Lien (GSFC/UMBC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 200219A\n75 s after the BAT trigger (Lien et al., GCN Circ. 27125).\nNo optical afterglow consistent with the XRT position\n(Osborne et al. GCN Circ. 27138)\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            75          225          147         >20.2\nu_FC               287          537          246         >19.3\nwhite               75        19365         1139         >21.2\nv                  617        30839         1770         >19.7\nb                  543        36572         2257         >20.9\nu                  287        25105         2431         >20.7\nw1                 666        40797         1248         >20.4\nm2                 641        40734         2104         >20.4\nw2                 592        28878          914         >20.2\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.02 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 27165,
  "createdOn": 1582308154000,
  "email": "mhs18@psu.edu",
  "subject": "GRB 200219A: UVOT Upper Limits",
  "submitter": "Mike Siegel at PSU/Swift MOC  <mhs18@psu.edu>",
  "eventId": "GRB 200219A"
}