[vsnet-grb-info 3498] GRB 060717 optical upper limit

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5333
SUBJECT: GRB 060717 optical upper limit
DATE:    06/07/17 19:36:43 GMT
FROM:    Alexander Stefanescu at MPE  <astefan at mpe.mpg.de>

A. Stefanescu, G. Kanbach, S. Duscha, F. Schrey, M. Muehlegger,
N.Prymak, H. Steinle (MPE Garching) of the OPTIMA-Burst team report from 
the 1.3m Skinakas Observatory(University of Crete, Heraklion, Greece):

We observed the position of the refined XRT errorcircle (GCN 5331, 
Capalbi et al.) on 2006-07-17 at 18:55 UT (9:48h post burst). We do not 
detect a counterpart candidate in our 3x600s white light exposures 
brighter than 21mag.