Does anyone know how the progress is on the attempts to detect gravitational waves with interferometry? As far as I know there are only null-results up to this date, but maybe I am misinformed? The recent supernova in the galaxy Messier 101, should it generate gravitational waves of amplitude/wavelength detectable by current apparature? (It was a supernova of type 1a at a distance of 21 million light-years). What kind of cosmic event must, according to general relativiy, if they take place not to far away generate gravitational waves that are detectable with the the apparatures of today? Maybe someone working on LIGO or some other attempt to detect gravitational waves are present on physicsforums and is willing to share his/her thoughts?