[vsnet-grb-info 15126] GRB 140619A: Swift/UVOT Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16418
SUBJECT: GRB 140619A: Swift/UVOT Observations
DATE:    14/06/20 00:27:09 GMT
FROM:    Mike Siegel at PSU/Swift MOC  <siegel at swift.psu.edu>

M. H. Siegel (PSU), F. E. Marshall (NASA/GSFC), J. Linevsky (PSU),
and M. De Pasquale (INAF-IASFPA) report on behalf of the
Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140619A
147 s after the BAT trigger (De Pasquale et al., GCN Circ. 16415).
We confirm a faint afterglow consistent with the XRT position is detected in the
initial UVOT exposures. We have corrected the positions in the 2.7' x 2.7’ UVOT
sub-image by comparing positions with the Digital Sky Survey. The UVOT afterglow
is located at:
  RA  (J2000) =  01:48:26.15 =  27.10896 (deg.)
  Dec (J2000) = -39:15:32.6  = -39.25906 (deg.)
with an estimated uncertainty of 1.0 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 finding chart (FC) exposure and
subsequent exposures are:

Filter      T_start(s)   T_stop(s)   Exp(s)     Mag

white (fc)     147          245        96     20.39+-0.24
white         5112         5312       196     >21.05
b            11745        12179       422     >20.65
u            10833        11740       885     >20.82
uvw1          5933         6133       196     >19.77
uvm2          5727         5927       196     >19.59
uvw2          5317         5517       196     >19.87

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).