GCN Circular 20029

Subject

GRB 161011A: Swift/UVOT Upper Limits

Event

Date

2016-10-11T17:23:48Z (10 years ago)

From

Frank Marshall at GSFC <femarsha@khamseen.gsfc.nasa.gov>

F. E. Marshall (NASA/GSFC) and V. D'Elia (ASDC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 161011A
118 s after the BAT trigger (D'Elia et al., GCN Circ. 20023Loading...
 
 ).
No optical afterglow consistent with the XRT position
(Osborne et al., GCN Circ. 20026Loading...
 
 ) 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           118          268          147         >20.7
u_FC               330          580          246         >20.0
white              118         1009          334         >21.1
v                  660         6564          255         >19.4
b                  586        11301          252         >20.3
u                  330        11089         1170         >20.6
w1                 709         6889          152         >20.4
m2                6569         6769          197         >20.3
w2                1015         6359          216         >20.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.07 in the direction of the burst
(Schlegel et al. 1998).