It is a new Authorship Markup
Here is a way that was posted on a SEO forum .
1. Create a new Google Profile and add a "contributor to" link to your website. Also make sure your profile is public, although I'm 90% sure they are public as default.

2. Add the Rel authorship code with a link to your Google profile on every single page of your website. If you're using Wordpress just edit the header.php and add it underneath your style sheets.
Code:
<link rel="author" href="https://plus.google.com/123455678910/">
3. Then test your mark up with the Google Rich Snippets Testing Tool.
This used to be white list only, but now you just need to wait to be recrawled. I've tested with with stock images and it showed up after about a week.
Hope this helps