As I understand it, the reason that the MACHO surveys weren't continued was because the event rate was low (you expect 1% the event rate with 100 M_sun MACHOs t

As I understand it, the reason that the MACHO surveys weren't continued was because the event rate was low (you expect 1% the event rate with 100 M_sun MACHOs than 1 M_sun MACHOs). Looking longer would solve the problem. The thing I'm really bummed about is that MACHOs dropped out of the conversation ten years ago, so nobody new to the field would have known without digging that MACHOs still had a shot.