Yup I am sure. The Crab pulsar is one of only three pulsars to emit super strong giant RF bursts. These are second only to the sun in intensity (brightness) in the sky. It is also the first pulsar to be discovered that emits visible light pulses as well.
Remember the Crab Nebula is only about 6500 light years away.
It might serve the same purpose as a lighthouse.
Anyway, I couldn't remember if they (NASA/Bell) said 40 or 40K lightyears away. I do remember the guest was a physicist
later in the show, and basically said "Yeah, right. Just because there is no known/understood cause for the
disruptions..."
In any case, I have to look up the Crab Pulsar.
close for a weekend trip.