{
  "eventId": "GRB 260922A",
  "body": "S. P. R. Shilling (Lancaster U.) 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 260922A\n118.5 s after the BAT trigger (Page et al., GCN Circ. 45690). \nNo optical afterglow consistent with the enhanced XRT position\n(Beardmore et al., GCN Circ. 45696) is detected in the initial UVOT exposures.\n\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           118          268          147         >20.2\nwhite              118         4697          530         >20.8\nv                  661         1062           58         >18.3\nb                  587         1161           58         >19.2\nu_FC               331          581          246         >19.7\nu                  331         1135          285         >19.8\nw1                 710         1111           19         >18.1\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.035 in the direction of the burst\n(Schlegel et al. 1998).",
  "subject": "GRB 260922A: Swift/UVOT Upper Limits",
  "submitter": "s.shilling@lancaster.ac.uk",
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "format": "text/plain",
  "circularId": 45700,
  "createdOn": 1790144769578,
  "submittedHow": "web"
}