GCN Circular 14857
Subject
GRB 130609B: Swift/UVOT Observations
Date
2013-06-10T16:46:41Z (12 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) and H. A. Krimm (CRESST/GSFC/USRA)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130609B
85 s after the BAT trigger (Krimm et al., GCN Circ. 14841).
A fading source consistent with the XRT position (Goad et al. GCN Circ.
14847) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 03:35:05.11 = 53.77128 (deg.)
Dec (J2000) = -40:10:26.7 = -40.17409 (deg.)
with an estimated uncertainty of 0.50 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 first and second orbit
exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white (fc) 84 234 147 15.47+-0.02
white 577 1891 283 17.36+-0.03
white 6046 7681 393 18.39+-0.05
v 799 1941 136 16.89+-0.09
v 6457 6657 196 18.00+-0.15
b 552 1866 136 17.32+-0.06
b 5841 7476 393 18.46+-0.09
u (fc) 297 546 245 16.31+-0.04
u 700 1841 116 17.15+-0.08
u 5636 7271 393 18.15+-0.09
uvw1 676 1816 136 17.61+-0.12
uvw1 5432 7067 393 18.75+-0.15
uvm2 823 1791 116 19.12+-0.35
uvm2 6662 6861 196 >19.66
uvw2 603 1916 116 >19.51
uvw2 6252 7855 362 >20.39
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).