Google has a helpful article in Webmaster Tools about Authorship.
In the case of Atul...
- If his "representative" site is located at http://www.ultraseo.com/author/atul/, then you could apply the rel="author" attribute to links pointing to that page.
- If his site is located somewhere else like http://www.example.com/, then you would need to either: link to the offsite page from each of your articles (again, using the rel="author" attribute on the links)..... Or, if you wanted to keep these links on site and just link to the offsite page where you have "Visit Authors Website" on his profile page. On that link you would have the rel="author" attribute.
In my opinion, I think you should include the profile page link in the article "condensed list" type pages, which are more likely to fall into a noindex situation. Then on the actual article pages you could include the authorship link, giving proper credit where credit is due.