GCN Circular 13410
Subject
GRB 120701A: Swift/UVOT Detection
Event
Date
2012-07-03T21:34:12Z (13 years ago)
From
Alice Breeveld at MSSL-UCL <aab@mssl.ucl.ac.uk>
A. A. Breeveld (MSSL-UCL) and T. N. Ukwatta(MSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120701A
89 s after the BAT trigger (Barthelmy et al. GCN Circ. 13404).
A fading source consistent with the XRT and GROND positions (Evans et
al., GCN Circ. 13406 and Elliott et al., GCN Circ. 13409) is detected in
the initial UVOT exposures in white and U.
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 and summed exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 89 239 147 18.27 � 0.06
white 880 1030 147 20.01 � 0.36
v 6603 6809 197 >18.8
b 5994 18439 494 >20.3
u_FC 303 553 245 19.16 � 0.23
u 5788 5988 197 >19.9
w1 11812 12668 842 >20.6
m2 6815 22538 969 >20.7
w2 6405 6605 197 >19.8
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).