{
  "bibcode": "2022GCN.32351....1L",
  "body": "GRB 220706A: Swift/UVOT Upper Limits\n\nS. J. LaPorte (PSU) and A. D'Ai (INAF-IASFPA)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 220706A\n107 s after the BAT trigger (D'Ai et al., GCN Circ. 32329).\nNo optical afterglow consistent with the XRT position\n(Goad et al. GCN Circ. 32333)\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           107          257          147         >20.5\nu_FC               320          570          246         >20.0\nwhite              107         1025          334         >20.5\nb                  751          771           19         >18.5\nu                  320          570          246         >20.0\nw1                 701          720           19         >17.8\nm2                 849          869           19         >18.6\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.025 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 32351,
  "createdOn": 1657310771000,
  "email": "sjl5346@psu.edu",
  "subject": "GRB 220706A: Swift/UVOT Upper Limits",
  "submitter": "Sam LaPorte at PSU  <sjl5346@psu.edu>",
  "eventId": "GRB 220706A"
}