[vsnet-grb-info 13481] GRB 130606A: Swift/UVOT Upper Limits
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat Jun 8 05:02:11 JST 2013
TITLE: GCN CIRCULAR
NUMBER: 14814
SUBJECT: GRB 130606A: Swift/UVOT Upper Limits
DATE: 13/06/07 20:02:03 GMT
FROM: Tyler Pritchard at PSU <tapritchard at astro.psu.edu>
T. A. Pritchard (PSU) and T. N. Ukwatta (MSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130606A
84 s after the BAT trigger (Ukwatta et al., GCN Circ. 14781).
No optical afterglow consistent with the optical position
(Xu et al., GCN Circ 15783) is detected in the initial UVOT exposures.
Aspect correction was lost in a number of sub-exposures resulting in
image streaks, rough aspect corrections and larger apertures have been
used to calibrate the field, although with a lower sensitivity.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 84 231 144 >21.1
u_FC 293 543 246 >20.3
white 84 6539 361 >22.1
v 5314 12245 1148 >20.6
b 549 6334 236 >20.7
u 293 18354 561 >20.4
w1 672 18247 1102 >21.1
m2 5519 15930 625 >20.5
w2 1028 6744 216 >20.1
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).
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