Re: "unexpected explosive events in the Universe".
Integral has very large field of view so mostly just stares at big patches of sky and waits to see something. Interesting trick has been done in fact: there is a shield around the main instruments whose job is to spot high-energy charged particles & photons which would hit the sensor from outside the main aperture, so they can be marked as spurious. But people worked out that this shield itself can be used as an instrument, and it can see almost the whole sky because that is its job. So they can use this to spot very high-energy events almost anywhere, such as gamma-ray bursts. This makes it very useful for detecting possible counterparts to GW events.
Biting the hand that feeds IT
