[vsnet-grb-info 20689] GRB 180614A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22787
SUBJECT: GRB 180614A: Swift/UVOT Upper Limits
DATE:    18/06/15 17:20:41 GMT
FROM:    Jeffrey Gropp at PSU  <jdg44 at psu.edu>

J. D. Gropp (PSU) reports on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180614A
65s after the BAT trigger (Gropp et al., GCN Circ. 22780).
No optical afterglow consistent with the enhanced XRT position
(Gropp et al. GCN Circ. 22780)
is detected in the initial UVOT exposures.
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

b              556     1872    136    >19.63
uvm2       654     1797    136    >18.91
u              300     1847    362    >20.06
v              630     1773    136    >18.75
uvw1        679     1823    136    >19.03
uvw2        605     1922    155    >19.20
white          87     1897    430    >21.15
white_FC    87      237    147    >20.75

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.14 in the direction of the burst
(Schlegel et al. 1998).