Are chainring bolts interchangeable?
No, you will need a set that is Campag compatible.

Some Campagnolo cranksets use special chain ring bolt that bolt through the ring and into the crank, at least behind the arm. The Athena 11 speed appears to be one of these. 

One of the 5 bolts is longer than the rest. And unlike other brands, these bolt into cranks, not into a receiving nut. 

This is a picture of a compatible set.