TAMBO: A Deep- Valley Neutrino Observatory

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 discovery of point sources of astrophysical neutrinos is a primary aim of neutrino astrophysics. To date, discovering such point sources has proven difficult because of the large atmospheric background neutrino telescopes must contend with. Because of this, only a handful of neutrino sources have been identified over the past 15 years. The development of high-purity detection techniques that minimize atmospheric backgrounds is thus an urgent need in neutrino astronomy. TAMBO is a next-generation neutrino telescope designed to perform a nearly background-free measurement of the neutrino sky. This high purity is achieved by the fact that TAMBO is sensitive only to 1 PeV , where the atmospheric background flux is significantly smaller than the astrophysical flux. TAMBO will comprise an array of water Cherenkov and plastic scintillator detectors deployed on the face of a deep valley, such as the Colca Canyon in the Peruvian Andes, with its unique geometry facilitating the high-purity measurement of astrophysical tau neutrinos. In this talk, I will present the prospects of TAMBO in the context of next-generation neutrino observatories and provide an overview of the roadmap of TAMBO-100, a pathfinder experiment.