GCN Circular 16540

Subject

GRB 140703A: Swift/UVOT Upper Limits

Event

Date

2014-07-07T23:45:44Z (12 years ago)

From

Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>

M. H. Siegel (PSU) and D. Kocevski (NASA/GSFC/ORAU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140703A
123 s after the BAT trigger (Kocevski et al., GCN Circ. 16503Loading...
 
 ).
No optical afterglow consistent with the XRT position
(Kocevski et al. GCN Circ. 16503Loading...
 
 )
is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC           123          239          114         >19.7
white              123         5830          507         >20.5
v                 4606         4806          197         >19.3
b                 3991         5626          393         >20.2
u                 3785         5420          393         >20.1
w1                5016         5216          197         >19.7
m2                4811         5010          197         >20.2
w2                4401         6002          359         >20.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.10 in the direction of the burst
(Schlegel et al. 1998).