{
  "bibcode": "2009GCN..9731....1C",
  "body": "M.M. Chester (PSU) and P. A. Evans (U Leicester) report on behalf of the \nSwift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 090727\n92 s after the BAT trigger (Evans et al., GCN Circ. 9718).  We do not find \nany new source at the position of the XRT afterglow (Goad et al., GCN Circ. \n9721). Preliminary 3-sigma upper limits for the white finding chart and the \nco-added images, using the UVOT photometric system (Poole et al. 2008, \nMNRAS, 383, 627), are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite_FC            92          241          147         >20.6\nwhite               92         5987          541         >21.5\nv                 4760        57429         3737         >21.1\nb                 4145        46543         1752         >21.3\nu                 3939        52323         4261         >21.8\nw1                5171        51651         4625         >22.1\nm2                4965        57845         4989         >22.3\nw2                4556        56519         3825         >21.7\n\nThe values quoted above are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.54 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 9731,
  "createdOn": 1248832858000,
  "email": "chester@astro.psu.edu",
  "subject": "GRB 090727: Swift/UVOT Upper Limits",
  "submitter": "Margaret Chester at PSU  <chester@astro.psu.edu>",
  "eventId": "GRB 090727"
}