GCN Circular 16019
Subject
GRB 140320B: Swift/UVOT Upper Limits
Date
2014-03-21T13:02:09Z (10 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (UCL-MSSL) and R. L. C. Starling, (U. Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140320B
11975 s after the INTEGRAL trigger (Mereghetti et al., GCN Circ. 16004).
No optical afterglow consistent with the XRT position
(Pagani et al., GCN Circ. 16013) and the FTN optical position
(Guidorzi et al., GCN Circ. 16003) 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 initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 11975 29408 5864 >23.1
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).