{
  "bibcode": "2020GCN.27090....1K",
  "body": "N. P. M. Kuin (UCL-MSSL) and M. G. Bernardini (INAF-OAB)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 200215A\n90 s after the BAT trigger (Bernardini et al., GCN Circ. 27079).\nNo optical afterglow consistent with the XRT position (Evans et al. GCN\nCirc. 27089) is 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            90          240          147         >20.0\nu_FC               302          552          246         >20.0\nwhite               90         7290          581         >21.2\nv                  634         5070          294         >18.5\nb                  559         7092          294         >19.8\nu                  302         6885          481         >20.3\nw1                1087         6680          216         >19.2\nw2               10534        11091          547         >19.8\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.15 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 27090,
  "createdOn": 1581816570000,
  "email": "npkuin@gmail.com",
  "subject": "GRB 200215A: Swift/UVOT Upper Limits",
  "submitter": "Paul Kuin at MSSL  <npkuin@gmail.com>",
  "eventId": "GRB 200215A"
}