GCN Circular 14870

S. T. Holland (STScI) and Hans Krimm (CRESST/GSFC/USRA) report on
behalf of the Swift/UVOT team:

    The Swift/UVOT began settled observations of the field of GRB
130608A starting 168 s after the BAT trigger (Krimm et al. 2013, GCNC
14827).  We do not detect any new source consistent with the
UVOT-enhanced XRT position (Beardmore 2013, GCNC 14832) in any of the
UVOT exposures.  Preliminary 3-sigma upper limits using the UVOT
photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373)
for the finding chart (FC) exposures and initial summed exposures are
presented below.

Filter      TSTART      TSTOP   Exposure      Mag
-------------------------------------------------
white (FC)     169        318        147    >21.0
               607        626         19    >19.6
u (FC)         327        576        246    >20.1
               731        750         19    >18.4
-------------------------------------------------
v              657     12,041       1154    >20.6
b              583       6742        452    >20.8
u             4899       6536        393    >20.5
uvw1           706       6331        432    >20.6
uvm2           681     12,759       1134    >21.3
uvw2           632     11,127       1199    >21.5
white          858       6946        560    >21.5
-------------------------------------------------

    The quoted upper limits have not been corrected for the expected
extinction due to the Galactic reddening along the line of sight to
this burst of E(B-V) = 0.05 mag (Schlafly et al. 2011, ApJS, 737,
103).