Kavli Affiliate: Angela V. Olinto
| First 5 Authors: Angela V. Olinto, , , ,
| Summary:
The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) was designed as a
NASA Astrophysics probe-class mission to identify the sources of ultrahigh
energy cosmic rays (UHECRs) and observe cosmic neutrinos from extremely
energetic transient sources. POEMMA consists of two identical spacecraft flying
in a loose formation at 525 km altitude oriented to view a common atmospheric
volume and to provide full-sky coverage for both types of messengers. Each
spacecraft hosts a wide field of view Schmidt telescope with a hybrid focal
plane optimized to observe both the UV fluorescence signal from extensive air
showers (EASs) and the optical Cherenkov signals from EASs. When in stereo
close to nadir mode, POEMMA can measure the spectrum, composition, and full-sky
distribution of the UHECRs above 20 EeV and be sensitive to UHE neutrinos. When
pointing just below the Earth’s limb, POEMMA will be sensitive to cosmic tau
neutrinos above 20 PeV by observing the Cherenkov radiation of EASs produced by
upward-moving tau decays, induced from tau neutrino interactions in the Earth.
POEMMA is designed to quickly re-orient to follow a Target-of-Opportunity (ToO)
neutrino transient from astrophysical sources with exceptional sensitivity to
neutrinos from both short-duration transients, such as short-gamma-ray bursts
(sGRBs), and long-duration sources, such as binary neutron star (BNS) mergers.
Here we review the POEMMA mission and discuss the recent progress towards its
technical readiness provided by the Mini-EUSO and EUSO-SPB2 missions and the
forthcoming Terzina and POEMMA-Balloon-Radio missions
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