[vsnet-grb-info 13674] GRB 130702A: Continued UVOT Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14991
SUBJECT: GRB 130702A: Continued UVOT Observations
DATE:    13/07/05 23:04:12 GMT
FROM:    Mike Siegel at PSU/Swift MOC  <siegel at swift.psu.edu>

GRB 130702A: Continued UVOT Observations

B. Porterfield (PSU), M. Siegel (PSU) and P. D'Avanzo (INAF-OAB)
report on behalf of the Swift/UVOT team:

Swift reobserved the field of GRB 130702A on July 4 and July 5 2013. 
We confirm the slow fading of the source first reported by Singer et al. (GCN Circ. 
14973) and previously reported in UVOT by D'Avanzo et al. (GCN Circ. 14973).
We also note that we detect the transient in all four of UVOT's NUV filters,
which is consistent with the low redshift reported by Leloudas et al. (GCN Circ. 14983)
and D'Avanzo et al. (GCN Circ. 14984).

Preliminary detections using the UVOT photometric system (Breeveld et  
al. 2011, AIP Conf. Proc. 1358, 373) are:

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

u            151366       153361       1962      18.48+-0.05
u            203252       205246       1962      18.97+/-0.07
u            250292       255654       272       19.51+/-0.26
uvw1         249967       255532       629       19.29+/-0.17
uvm2         251591       252014       415       19.67+/-0.28
uvw2         284670       285309       629       19.26+/-0.14

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).