{
  "bibcode": "2010GCN.11016....1O",
  "body": "S. R. Oates (MSSL-UCL) and J. K. Cannizzo (NASA/UMBC) report on behalf  \nof the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of\nGRB 100728A 86s after the BAT trigger (Cannizzo et al., GCN 11004).\nWe do not detect a new source at the enhanced Swift XRT position\n(Evans et al. GCN 11005).\n\nThe preliminary 3-sigma upper limits for the finding chart exposures  \n(FC)\nand summed images are:\n\nFilter   T_start   T_stop   Exp(s)  Mag (3-sigma upper limit)\n-------------------------------------------------------------\nwhite (FC)  86      236      147        >20.54\nwhite       578     7432     657        >21.16\nu     (FC)  299     548      246        >19.82\nu           702     7021     490        >20.04\nv           628     11695    1218       >20.06\nb           554     7226     510        >20.37\nuvw1        677     13337    1228       >20.62\nuvm2        1255    12600    1337       >20.69\nuvw2        604     7554     447        >20.19\n-------------------------------------------------------------\n\nThe quoted upper limits have not been corrected for the expected\nGalactic extinction corresponding to a reddening along the line of\nsight of E_(B-V) = 0.18 mag. All photometry is on the UVOT photometric\nsystem described in Poole et al. (2008, MNRAS, 383, 627).",
  "circularId": 11016,
  "createdOn": 1280325685000,
  "email": "sro@mssl.ucl.ac.uk",
  "subject": "GRB 100728A: Swift/UVOT Upper Limits",
  "submitter": "Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>",
  "eventId": "GRB 100728A"
}