Wagbert is correct and 2009 Kennedy proofs were only minted at the San Francisco mint. However, if I recall correctly Kennedy halves were not released into general circulation starting in 2002. They were still produced to meet the demand of the collector market and were sold in rolls and bags to collectors at a premium above face value. So even if it's not a proof, it's still a coin that wasn't released by the mint into circulation. Good find!