[vsnet-grb-info 3583] GRB060807: optical upper limit in white light

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5417
SUBJECT: GRB060807: optical upper limit in white light
DATE:    06/08/07 20:29:05 GMT
FROM:    Sven Duscha at MPE  <sduscha at mpe.mpg.de>

 S. Duscha M. Muehlegger A. Stefanescu G. Kanbach,N. Prymak, F. Schrey 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 XRT errorcircle of GRB 060807 (trigger 
#223217 De Pasquale et al. GCN Circ. 5409) on 2006 Aug 07 19:25 UT 
(mid-exposure; about 5 hours post burst): In a 20 min white light exposure we 
do not detect a counterpart candidate brighter than mag 20.