GCN Circular 16990
Subject
GRB 141028A: Swift/UVOT followup observations
Date
2014-10-30T13:21:38Z (10 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. Breeveld (MSSL/UCL) and C. Pagani (U. Leicester) report on behalf of
the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 141028A
31037 s after the LAT trigger (Bissaldi et al., GCN Circ. 16969).
A fading source is detected in the initial exposures (Siegel and
Pagani, GCN Circ., 16979) in the position given in that circular, also
consistent with MASTER (Gorbovsky et a., GCN, Circ 16972), GROND (Graham
et al., GCN Circ. 16977) and the XRT (Pagani, et al., GCN Circ 16986).
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
u 31037 31179 140 19.0+-0.18
u 69790 72355 2525 20.7+-0.13
u 105469 127705 4880 21.3+-0.18
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.05 in the direction of the
burst (Schlegel et al. 1998).