{
  "bibcode": "2019GCN.24159....1S",
  "body": "GRB 190422A: Swift/UVOT Upper Limits\n\nK. K. Simpson (PSU) and M. J. Moss (George Washington University)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 190422A\n532 s after the BAT trigger (Moss et al., GCN Circ. 24147).\nNo optical afterglow consistent with the XRT position\n(Evans et al. GCN Circ. 24151)\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           532          682          147         >18.8\nwhite              532         7906          647         >18.8\nv                  689         6879          352         >17.2\nb                  788         7700          352         >18.3\nu                  763         7495          352         >18.9\nw1                 738         7289          352         >19.1\nm2                 713         7084          352         >19.1\nw2                 838         7995          438         >19.6\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 1.58 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 24159,
  "createdOn": 1556040619000,
  "email": "kira.simpson1984@gmail.com",
  "subject": "GRB 190422A: Swift/UVOT Upper Limits",
  "submitter": "Kira Simpson at PSU  <kira.simpson1984@gmail.com>",
  "eventId": "GRB 190422A"
}