[vsnet-grb-info 3965] GRB 061102: Swift/UVOT Magnitude Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  5784
SUBJECT: GRB 061102: Swift/UVOT Magnitude Upper Limits
DATE:    06/11/02 14:37:28 GMT
FROM:    Stephen Holland at USRA/NASA/GSFC/SSC  <sholland at milkyway.gsfc.nasa.gov>

GRB 061102: Swift/UVOT Magnitude Upper Limits

S. T. Holland (NASA/GSFC & USRA) reports on behalf of the Swift/UVOT
team:

        The Swift/UVOT began observing the field of GRB 061102 at
01:02:02 on 2006-11-02, 92 s after the BAT trigger (Holland et al.,
GCN Circ. 5776).  No optical afterglow was detected in any of the
individual UVOT exposures, or in the coadded exposures, down to the
following 3-sigma limiting magnitudes.  The start and stop times are
relative to the BAT trigger.

Filter     Start   Stop   Exposure    3-sigma
             (s)     (s)      (s)     Upper Limit

Finding Charts
  White       112    209       97        19.9
    V         216    275       59        18.3

Coadded Exposures
    V         216  10154     1141        20.5
    B        4078  16849     1278        21.6
    U        3873  15938     1278        21.3
   UVW1      3669  11845     1160        21.3
   UVM2      3464  11059     1279        21.7
   UVW2      4488   6061      336        20.9
  White       112  17629     1247        21.5

The values quoted above are not corrected for the expected Galactic
extinction of E_{B-V} = 0.04 mag (Schlegel et al. 1998).