Gravitational waves and gamma-ray bursts
  Gamma-Ray Bursts are likely associated with a catastrophic energy release in
stellar mass objects. Electromagnetic observations provide important, but
indirect information on the progenitor. On the other hand, gravitational waves
emitted from the central source, carry direct information on its nature. In
this context, I give an overview of the multi-messenger study of gamma-ray
bursts that can be carried out by using electromagnetic and gravitational wave
observations. I also underline the importance of joint electromagnetic and
gravitational wave searches, in the absence of a gamma-ray trigger. Finally, I
discuss how multi-messenger observations may probe alternative gamma-ray burst
progenitor models, such as the magnetar scenario.
