GCN Circular 14759
Subject
GRB130603B: Swift/UVOT detection
Event
Date
2013-06-04T11:59:05Z (13 years ago)
From
Massimiliano de Pasquale at MSSL-UCL <m.depasquale@ucl.ac.uk>
M. De Pasquale (MSSL-UCL) and A. Melandri (INAF-OAB)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130603B
62 s after the BAT trigger (Melandri et al., GCN Circ. 14735).
A source 2'' from the centre of the XRT error circle (Evans et al. GCN Circ.
14739) and coincident with the optical afterglow detected by WHT
(Levan et al., GCN circ. 14742) and NOT (de Ugarte Postigo et al., GCN circ.
14743) is detected in UVOT exposures.
The source, in UVOT images, shows no clear fading behaviour between the
first and the latest exposures.
Preliminary detections and 3-sigma upper limits using the UVOT
photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early
exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 62 4981 383 20.81 �0.17
v 605 5393 225 >19.8
b 530 6212 432 21.14 �0.45 (2.5 sigma)
u 275 6007 659 20.87 �0.39 (2.8 sigma)
w1 654 5802 413 >20.6
m2 3960 5597 393 >20.4
w2 580 6555 365 20.69 �0.39 (2.8 sigma)
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).