After the announcement , on October 12 , 1995 , more proof that this star did exist came from Dr. Geoffrey Marcy from San Francisco State University and Dr. R. Paul Butler from the University of California , Berkeley using the Hamilton Spectrograph at the Lick Observatory near San Jose in California . After the announcement , on October 12 , 1995 , confirmation came from Dr. Geoffrey Marcy from San Francisco State University and Dr. Paul Butler from the University of California , Berkeley using the Hamilton Spectrograph at the Lick Observatory near San Jose in California .