{
  "bibcode": "2005GCN..3280....1S",
  "body": "P. Schady (MSSL), T. Sakamoto (GSFC/NRC), K. McGowan (MSSL), P. Boyd\n(GSFC/UMBC), P. Roming (PSU), J. Nousek (PSU), N. Gehrels (GSFC), on behalf of\nthe Swift UVOT team.\n\nStarting with the data taken ~207s after the BAT trigger (Sakamoto et al., GCN \n3264) we have co-added the early time data of GRB 050416 in each of the \nUltra-Violet/Optical Telescope (UVOT) U, B, and V bands. The co-added images \nare made up of 9 x 10s exposures. A source is detected at the position of the \nafterglow (Cenko & Fox, GCN 3265) in the U and B band with magnitudes U = 19.34 \n+/- 0.2 and B = 19.85 +/- 0.2. No source is detected in the V co-added \nimage down to a 5-sigma limiting magnitude V > 19.57. There is ~173s \ndifference between the start of the finding chart exposure, in which a \nsource was detected (Schady et al., 3276) and the co-added image.\n\nThe magnitudes are based on preliminary zero-points, measured in orbit and will \nrequire refinement with further calibration.",
  "circularId": 3280,
  "createdOn": 1113697379000,
  "email": "ps@mssl.ucl.ac.uk",
  "subject": "GRB 050416: Swift/UVOT refined analysis",
  "submitter": "Patricia Schady at MSSL/Swift  <ps@mssl.ucl.ac.uk>",
  "eventId": "GRB 050416"
}