GCN Circular 6633

Subject

GRB 070714A: Swift/UVOT Upper limits

Event

Date

2007-07-16T20:38:18Z (19 years ago)

From

Margaret Chester at PSU <chester@astro.psu.edu>

M.M. Chester (PSU) and D. Grupe (PSU) report on the behalf of the
Swift UVOT team:

The Swift/UVOT observed the field of GRB070714A (trigger=284850)
starting 2007-195-03:21:15, 44 s after the BAT trigger (Grupe et al.
2007, GCN Circ. 6619Loading...
 
 ). We do not find any new source in any of the UVOT
observations inside the refined XRT error circle (Grupe 2007, GCN Circ.
6628Loading...
 
 ).

The 3-sigma upper limits for detecting a source inside the XRT error
circle in the first finding chart (FC) exposure and the co-added frames
(including the finding chart) are:

Filter   Tstart   Tstop    Exp     Magnitude
            (s)     (s)     (s)    (3-sigma UL)
White FC    61     161      98.2     20.19
White       61    1641     235       20.63
v           44    1690     855       19.69
b          647    5955     138       19.55
u          622    5868     274       19.71
uvw1       598    5664     274       19.03
uvm2      5258    5458     197       18.96
uvw2       677    1666      77.8     18.49

The values quoted above are not corrected for the expected Galactic
extinction corresponding to a reddening of E_{B-V} = 0.186 mag in the
direction of the burst (Schlegel et al. 1998).