Ricerc@Sapienza

Multimessenger observations may hold the key to learn about the most energetic sources in the universe. The recent construction of new, large scale observatories opened new possibilities in testing cosmic processes with alternative probes, such as high energy neutrinos and gravitational waves.
Multimessenger observations may hold the key to learn about the most energetic sources in the universe. The recent construction of new, large scale observatories opened new possibilities in testing cosmic processes with alternative probes, such as high energy neutrinos and gravitational waves.
We propose to combine information from transient sources of electromagnetic signals (low and high energy photons) with neutrino observations to decipher a comprehensive picture of some of the most extreme cosmic processes. Transient sources will help in the identification of sources requiring the space and time coincidence of the observations.
In particular we will concentrate on the most promising photon emitter sources: transient Active Galactic Nuclei and sources of Gamma Ray Bursts. Electromagnetic information, including their spectral properties, will be acquired from public data-bases (like the ones provided by FERMI experiment), neutrino data will come from public IceCube data-base and by ANTARES data.
The joint detection of electromagnetic signals and neutrinos from these sources will probe the physics of the sources and will be a smoking gun of the presence of hadrons in these objects which is still an open question.
Conversely, the non-detection of neutrinos from these sources will be fundamental to constrain the hadronic content and gain information on the physics of these objects.
These analysis method, based on the reduction of the background thanks to the space-time coincident observation of different messengers coming from the same source, is at present the most promising procedure to search for high energy astrophysical sources.