[vsnet-grb-info 13573] GRB 130615A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14902
SUBJECT: GRB 130615A: Swift/UVOT Upper Limits
DATE:    13/06/15 19:21:11 GMT
FROM:    Samantha Oates at MSSL  <sro at mssl.ucl.ac.uk>

S. R. Oates (MSSL-UCL) and E. Sonbas (NASA/GSFC/Adiyaman Univ.)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 130615A
180 s after the BAT trigger (Sonbas et al., GCN Circ. 14897).
No optical afterglow consistent with the optical position
(Elliott et al. GCN Circ. 14898)
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

u_FC               180          430          246         >20.1
v                  463         7314          580         >20.1
u                  180        12850         1827         >21.3
w1                 512        11936         1434         >20.9
m2                 488         7445          672         >20.3
w2                 439        13208          933         >20.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.12 in the direction of the burst
(Schlegel et al. 1998).