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The POEMMA (Probe of Extreme Multi-Messenger Astrophysics) Observatory
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abstract
The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) is designed to accurately observe ultra-high-energy cosmic rays (UHECRs) and cosmic neutrinos from space with sensitivity over the full celestial sky. POEMMA will observe the extensive air showers (EASs) from UHECRs and UHE neutrinos above 20 EeV via air fluorescence. Additionally, POEMMA will observe the Cherenkov signal from upward-moving EASs induced by Earth-interacting tau neutrinos above 20 PeV. The POEMMA spacecraft are designed to quickly re-orientate to follow up transient neutrino sources and obtain unparalleled neutrino flux sensitivity. Developed as a NASA Astrophysics Probe-class mission, POEMMA consists of two identical satellites flying in loose formation in 525 km altitude orbits. Each POEMMA instrument incorporates a wide field-of-view (45$^\circ$) Schmidt telescope with over 6 m$^2$ of collecting area. The hybrid focal surface of each telescope includes a fast (1~$\mu$s) near-ultraviolet camera for EAS fluorescence observations and an ultrafast (10~ns) optical camera for Cherenkov EAS observations. In a 5-year mission, POEMMA will provide measurements that open new multi-messenger windows onto the most energetic events in the universe, enabling the study of new astrophysics and particle physics at these otherwise inaccessible energies.
Forward citations
Cited by 9 Pith papers
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Probing Neutrino Flavor Composition with the Glashow Resonance at Tau Air-Shower Neutrino Telescopes
Tau air-shower telescopes can potentially measure the PeV \bar{\nu}_e/(\nu_\tau+\bar{\nu}_\tau) ratio via the Glashow resonance, but standalone sensitivity only clearly separates \bar{\nu}_e-rich sources from standard...
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The Cosmic Neutrino Background is within Reach of Future Neutrino Telescopes
Including deep-inelastic scattering makes cosmic-ray-boosted relic neutrinos bright enough for IceCube to bound the CνB overdensity to ~100–1000, and future networks could reach the ΛCDM value.
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POEMMA-Balloon with Radio: An Overview
PBR is a proposed ultra-long-duration balloon payload combining fluorescence, Cherenkov, and radio detectors to observe ultra-high-energy cosmic rays and neutrinos from suborbital altitude.
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Leading-order gravitational time delay of massive particles by a moving Schwarzschild lens
A unified 1PM formula gives the gravitational time delay of relativistic massive and massless particles by a radially moving Schwarzschild lens, matching known light and static limits.
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The Extreme Universe Observatory on a Super-Pressure Balloon II: Mission, Payload, and Flight
A short balloon flight commissioned a fluorescence and a Cherenkov telescope at 33 km altitude and returned about 10 candidate cosmic-ray extensive air shower events from Cherenkov light.
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Ultra-High-Energy Particle Production in Binary Mergers Endowed with Magnetic Fields
Using a magnetized Kerr spacetime, the authors compute that binary merger remnants can yield proton collision energies up to 10^20 eV, proposing them as UHECR sources.
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Scrutinizing the cosmogenic origin of the KM3-230213A event: A Multimessenger Perspective
A multimessenger transport calculation finds that KM3-230213A is plausibly cosmogenic only if it originates from hard-spectrum protons above the ankle with source evolution close to (1+z)^3.
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Constraining self-interacting ultrahigh-energy muon neutrinos by cosmic microwave background spectral distortion
Scalar-mediated scattering of PeV muon neutrinos on the cosmic neutrino background injects photon energy that distorts the CMB, giving coupling bounds g_nu_mu of about 10^-4 to 10^-5 with projected PIXIE sensitivities...
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EUSO-SPB2 Cosmic Ray Searches and Observations
A 37-hour balloon flight validated a SiPM Cherenkov telescope by finding 14 simulation-consistent air-shower flash events, with no UHECRs in the fluorescence channel.
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