Opening the PeV Neutrino Window

Parallel talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/) Abstract: The Trinity Neutrino Observatory aims to cover an energy range from 1 PeV to 1 EeV using imaging atmospheric Cherenkov telescopes (IACTs) located at various sites to detect Earth-skimming neutrinos. The development of Tinity is organized into three phases.The first phase, which involved the successful operation of the Trinity Demonstrator— a small Cherenkov telescope deployed on Frisco Peak in Utah— is complete. The Demonstrator saw its first light on October 3, 2023, and has since recorded several hundred hours of data. The insights gained from operating the Demonstrator and analyzing its data have informed the design of Trinity One, the next phase towards the full Trinity Observatory.Trinity One will be the first telescope of the Trinity Observatory, capable of observing neutrino point sources across fifty percent of the sky with unprecedented sensitivity. I will report on the status of the Trinity Observatory, highlighting the lessons learned from the Demonstrator along with the current status and design of Trinity One and its expected performance.