GCN Circular 16494
Subject
GRB 140629A: Swift/UVOT Detection
Date
2014-06-30T11:32:49Z (11 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and A. Y. Lien (GSFC/UMBC) report on behalf of
the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140629A
101 s after the BAT trigger (Lien et al., GCN Circ. 16477).
A fading source consistent with the XRT position (Evans et al. GCN Circ.
16479) is detected in the initial UVOT exposures. The fact that it is
not seen in uvm2 or uvw2 filters is consistent with the redshift given
by Moskvitin et al., GCN Circ. 16489 and D�Avanzo et al., GCN Circ. 16493.
The preliminary UVOT position is:
RA (J2000) = 16:35:54.42 = 248.97676 (deg.)
Dec (J2000) = +41:52:36.8 = 41.87690 (deg.)
with an estimated uncertainty of 0.42 arc sec. (radius, 90% confidence).
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 101 251 147 14.78 � 0.02
v 643 663 20 15.29 � 0.09
b 569 589 20 15.70 � 0.06
u 313 563 246 14.89 � 0.03
w1 692 712 19 17.5 � 0.3
m2 667 687 19 >17.5
w2 619 639 19 >18.0
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.01 in the direction of the
burst (Schlegel et al. 1998).