TITLE:   GCN CIRCULAR
NUMBER:  43702
SUBJECT: GRB 260208A: Swift UVOT detection
DATE:    26/02/11 17:42:26 GMT
FROM:    Paul Kuin at MSSL <npkuin@gmail.com>

Paul Kuin (MSSL/UCL) and Brad Cenko (NSA/GSFC) reports on behalf of
the Swift/UVOT team:

The Swift/UVOT began observations of the Fermi-detected GRB 260208A
35.4 ks after the Fermi Trigger (Fermi GBM team, GCN Circ. 43635;
Longo et al., GCN Circ. 43645). We detect the afterglow at the position
given by Podesta et al., GCN Circ. 43640. 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

white          35662.9       41566.1       1208      20.84 +/-0.10

 
white          46325.8       47072.6        735      21.45 +/-0.21


u              35131.3       40857.7       1208      20.34 +/-0.14

 
u              45572.3       46319.1        735      20.12 +/-0.15
                                                             

v              36195.1       47089.2        938      20.01 +/-0.32