GCN Circular 12180
Subject
Swift/UVOT observations of GRB110719A
Event
Date
2011-07-19T18:18:06Z (14 years ago)
From
Massimiliano de Pasquale at MSSL-UCL <mdp@mssl.ucl.ac.uk>
M. De Pasquale, C.J. Saxton (MSSL-UCL) and T. Sakamoto (NASA/UMBC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 110719A
121 s after the BAT trigger (Sakamoto et al., GCN Circ. 12173).
No optical afterglow consistent with the XRT position (Pagani et al., GCN
Circ. 12173) is detected in the initial UVOT exposures and in the
summed exposures taken in all filters.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC)
exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 121 271 147 >20.2
u_FC 279 529 246 >19.2
white 121 17904 1080 >21.3
v 4848 10563 1143 >20.2
b 535 17151 1101 >21.1
u 279 16239 1328 >20.5
w1 5258 12124 836 >20.4
m2 5053 11468 1082 >20.8
w2 4643 6280 393 >20.2
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).