{
  "bibcode": "2021GCN.30710....1S",
  "body": "M. H. Siegel (PSU) and K. L. Page (U. Leicester)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 210822A\n85 s after the BAT trigger (Page et al., GCN Circ. 30677).\nA fading source consistent with the XRT position (Page et al.\nGCN Circ. 30677) and the previously reported UVOT source is \nis detected in the initial UVOT exposures.\n\nPreliminary detections and 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: \n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\nwhite (fc)          86          236          147      13.63+/-1.10\nwhite              577         1200          205      15.35+/-0.02\nwhite             4965         5058           91      17.43+/-0.05\nwhite            34405        35230          804      19.15+/-0.05\nwhite           149533       190336         1894      20.64+/-0.11\nv                  627         1250           77      15.07+/-0.05\nv                27494        28215          702      18.68+/-0.13\nb                  553         1176           58      15.31+/-0.04\nb                 4760         4960          196      17.56+/-0.06\nb                33493        34400          885      19.18+/-0.08\nu (fc)             298          548          245      13.78+/-0.03\nu                  700         1304           39      14.86+/-0.05\nu                 4555         4755          196      16.85+/-0.05\nu                57947        58635          670      19.73+/-0.19\nuvw1               676         1299           77      15.28+/-0.07\nuvw1             39434        96567         1775      19.90+/-0.22\nuvm2               824         1274           38            >17.66\nuvm2             92215        93015          788            >20.06\nuvw2               602         1225           77      17.21+/-0.18\nuvw2             21659        64335         1469      20.40+/-0.34\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.162 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 30710,
  "createdOn": 1629872496000,
  "email": "mhs18@psu.edu",
  "subject": "GRB 210822A: Swift/UVOT Detection",
  "submitter": "Mike Siegel at PSU/Swift MOC  <mhs18@psu.edu>",
  "eventId": "GRB 210822A"
}