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GCN Circular 14871

Subject
GRB 130609A: Swift/UVOT Upper Limits
Date
2013-06-11T14:56:06Z (11 years ago)
From
Stephen Holland at STScI <sholland@stsci.edu>
S. T. Holland (STScI) and J. R. Cummings (NASA/UMBC) report on behalf
of the Swift/UVOT team:

    The Swift/UVOT began settled observations of the field of GRB
130609A starting 70 s after the BAT trigger (Cummings et al. 2013,
GCNC 14828).  We do not detect any new source consistent with the
UVOT-enhanced XRT position (Evans 2013, GCNC 14835) 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)      70        220        147    >21.0
               562        582         19    >19.8
u (FC)         282        532        246    >20.3
               686        706         19    >18.6
-------------------------------------------------
v              612       6212        413    >19.9
b              537     18,175       1773    >21.7
u             5191     23,545       2254    >21.4
uvw1          4987     23,257       2164    >21.5
uvm2          4782     22,351       1279    >21.3
uvw2          4372       6007        393    >20.8
white         4166     12,406       1022    >22.0
-------------------------------------------------

    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) = 0.03 mag (Schlafly et al. 2011, ApJS, 737,
103).
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