Can objective morality exist in Atheism?

[Mandi]

If Atheism obtains (God does not exist) is there a source for morality other than oneself that is objective?

This is an argument I've heard from Christians. Morality or rather, a lack of, has to do with the said individuals' own "standards" for living. Not a belief in a magical being. In a sense though, religion does help with good morality, because some people have the: "I want to be a good person so that I can go to heaven" mindset so therefore they abide by the Bible and the "standards" that their religion sets down. So, in a sense I guess religion does play a role in someone's morality, but really (at least for me) it comes down to my standards for living, which have nothing to do with any religious doctrine.