" all curation rewards earned by voting in the first 30 minutes after a post is made will be shared with the author. If you vote immediately after a post is made, then 99.94% of the curation reward will go to the author. If you vote after 15 minutes, then 50% will go to the author. Any votes made 30 minutes or later 100% will go to the curator. This only applies to the curation rewards. The author still gets at least 50% of the total rewards.”

Here is link to the topic

https://steemit.com/steem/@steemship/how-to-vote-smart-and-profit-from-steemit-s-new-curation-rewards