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GCN Circular 5012

Subject

GRB 060427: Swift/UVOT upper limits.

Date

2006-04-27T21:25:56Z (19 years ago)

From

Massimiliano de Pasquale at MSSL-UCL <mdp@mssl.ucl.ac.uk>

M. De Pasquale (UCL-MSSL), V. Mangano (IASF Palermo) report on
behalf of the Swift/UVOT team:

  The Swift/UVOT began taking data on the field of GRB060427
at 11:45:13 UT on 2006-04-27, 122 s after the BAT trigger
(Mangano et al., GCN 5006Loading...
 
 ), with the settling exposure. No
afterglow candidate was detected at the refined XRT position
(Falcone et al., GCN  5009Loading...
 
 ) in summed images from any of
the filters down to the following three-sigma upper
limits.

  Filter  T_range(s)  Exp(s) 3sig_UL

  V       122-6920   1668   20.4
  B       610-6635    416   20.7
  U       585-6430    436   20.3
  UVW1    562-6226    457   20.0
  UVM2    562-6021    456   20.0
  UVW2    626-6840    436   20.5

  These upper limits are uncorrected for the estimated Galactic
reddening of E_{B-V} = 0.051 mag (Schlegel et al. 1998).