Neutrino counterpart of kHz GW sources

Multimessenger astrophysics provides unique and valuable insights into the properties and processes of the physical universe. The recent discovery of gravitational waves and high energy cosmic neutrinos, marked the beginning of a new era of the multimessenger astronomy. These new messengers, along with electromagnetic radiation and cosmic rays, give new insights into the most extreme energetic cosmic events. Among them supernovae explosion is one of the challenging targets of this new astronomical approach. We developed a machine learning algorithm to further improve the detectability of such type of source. Prospects for a third generation gravitational wave detector will be presented. The Euclid mission: current status, results from early observations, and future prospects / 465 Extended forecasts for Euclid in combination with other cosmological probes INFN Roma II The future Euclid space satellite mission will offer an invaluable opportunity to constrain modifications to general relativity at cosmic scales.I will present forecasts for extended cosmological scenarios such as k-mouflage gravity and the Transitional Planck Mass model, considering spectroscopic and photometric primary probes by Euclid alone and in combination with other probes. In particular the cross-correlation between the photometric Euclid probes and the CMB temperature and lensing, will be especially relevant for extended models that have modified growth of structure compared to the standard Lambda-Cold Dark Matter scenario. Our forecasts suggest that Euclid alone will significantly improve constraints on modified gravity parameters compared to current data. When combined with CMB observations, the sensitivity to deviations from GR increases substantially, allowing to constrain extra-parameters that are unconstrained with present data.