Ponente
Descripción
Multimessenger follow-up observations triggered by high-energy neutrino signals offer a powerful method for identifying cosmic ray sources, particularly when the sources are transient. In the energy range of neutrinos above 100 TeV, X-ray transients are a plausible source candidate, especially if the cosmic neutrino background radiation above 100 TeV originates from the same class of objects that emit ultrahigh-energy cosmic rays (UHECRs). We probe this hypothesis by searching for X-ray flashes associated with neutrino events detected by the IceCube Neutrino Observatory in archival data collected by the Monitor of All Sky X-ray Image (MAXI) mission. We present our findings on the combined analysis of neutrinos and soft X-rays, and the resulting constraints on the source parameter space. We also discuss the implications of the results for the characteristics of UHECR transient origins.
