{
  "bibcode": "2012GCN.14122....1O",
  "body": "S. R. Oates (MSSL-UCL) and E. Sonbas (NASA/GSFC/Adiyaman Univ.)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 121229A\n155 s after the BAT trigger (Sonbas et al., GCN Circ. 14115).\nNo optical afterglow consistent with the optical position\n(Varela et al. GCN Circ. 14117)\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           155          305          147         >20.9\nu_FC               314          563          246         >19.9\nwhite              155         6156          363         >21.2\nv                  644         6466          116         >18.9\nb                  570         5952          216         >20.5\nu                  314         5747          442         >20.1\nw1                3947         4136          186         >20.0\nm2                 670          690           19         >17.6\nw2                 620         6362          216         >20.1\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.16 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 14122,
  "createdOn": 1356807682000,
  "email": "sro@mssl.ucl.ac.uk",
  "subject": "GRB 121229A: Swift/UVOT Upper Limits",
  "submitter": "Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>",
  "eventId": "GRB 121229A"
}