{
  "bibcode": "2020GCN.26892....1U",
  "body": "GRB 200125A: Swift/UVOT Upper Limits\n\nK. K. Simpson (PSU) and A. Y. Lien (GSFC/UMBC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 200125A\n179 s after the BAT trigger (Lien et al., GCN Circ. 26876).\nNo optical afterglow consistent with the XRT position\n(Beardmore et al. GCN Circ. 26878)\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           179          329          147         >20.4\nwhite              179         4176          344         >21.1\nv                 4387         4586          197         >18.4\nb                 3771         3971          197         >19.9\nu                  337          414           75         >18.9\nw1                4796         4835           38         >18.6\nm2                4591         4791          197         >19.3\nw2                4182         4382          197         >20.2\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.08 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 26892,
  "createdOn": 1580088145000,
  "email": "kira.simpson1984@gmail.com",
  "subject": "GRB 200125A: Swift/UVOT Upper Limits",
  "submitter": "Kira Simpson at PSU  <kira.simpson1984@gmail.com>",
  "eventId": "GRB 200125A"
}