Gravitational wave un-modeled searches and astrophysical signatures Laura Cadonati, University of Massachusetts, Amherst As the Laser Interferometer Gravitational-wave Observatory (LIGO) enters its Enhanced and Advanced era, a growing network of collaborations between gravitational wave experiments, numerical relativity, astronomy and particle physics is taking shape. In this talk I will discuss the implications of such collaborations, in the context of un-modeled searches for gravitational waves. Un-modeled searches are designed to sift through data from multiple detectors for gravitational wave transients with minimal assumptions on the signal. I will review the challenges and advantages of these searches, with focus on the coalescence of compact objects and on core collapse supernovae. In particular, I will report on a study of detectability of binary black hole coalescences on a wide parameter space with numerical relativity waveforms and simulated data, and I will discuss the potential of coordinated gravitational wave and neutrino observations in the event of a nearby supernova.