GCN Circular 16380

Subject

GRB 140610A: Swift/UVOT Upper Limits

Event

Date

2014-06-11T12:33:01Z (12 years ago)

From

Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>

A. A. Breeveld (UCL-MSSL) and P. A. Evans (U Leicester) report on behalf 
of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140610A 
3145 s after the BAT trigger (Evans et al., GCN Circ. 16375Loading...
 
 ).
No optical afterglow consistent with the XRT position (Kennea et al. GCN 
Circ. 16376Loading...
 
 ) 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          3145         3295          147         >21.1
white             3145         9879         1229         >22.3
v                 3301         4937          393         >19.9
b                 4122         5685          320         >20.6
u                 3916         5552          393         >20.5
w1                3712         5347          393         >20.5
m2                3506         5142          393         >20.3
w2                4533        10719         1017         >21.3

The magnitudes in the table are not corrected for the Galactic 
extinction due to the reddening of E(B-V) = 2.56 in the direction of the 
burst (Schlegel et al. 1998).