Infrared Cloud Monitoring with UCIRC2

Rebecca Diesing,Stephan S. Meyer,Johannes Eser,Alexa Bukowski,Alex Miller, Jake Apfel, Gerard Beck,Angela V. Olinto

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)（2023）

KICP 𝑎 Department of Astronomy & Astrophysics

Cited 0|Views22

Abstract

The second generation of the Extreme Universe Space Observatory on a Super Pressure Balloon (EUSO-SPB2) is a balloon instrument that searched for ultra high energy cosmic rays (UHECRs) with energies above 1 EeV and very high energy neutrinos with energies above 1 PeV. EUSO-SPB2 consists of two telescopes: a fluorescence telescope pointed downward for the detection of UHECRs and a Cherenkov telescope toward the limb for the detection of PeV-scale showers produced by neutrino-sourced tau decay (just below the limb) and by cosmic rays (just above the limb). Clouds inside the fields of view of these telescopes--particularly that of the fluorescence telescope--reduce EUSO-SPB2's geometric aperture. As such, cloud coverage and cloud-top altitude within the field of view of the fluorescence telescope must be monitored throughout data-taking. The University of Chicago Infrared Camera (UCIRC2) monitored these clouds using two infrared cameras centered at 10 and 12 $\mu$m. By capturing images at wavelengths spanning the cloud thermal emission peak, UCIRC2 measured cloud color-temperatures and thus cloud-top altitudes. In this contribution, we provide an overview of UCIRC2, including an update on its construction and performance. We also show first results from the flight.

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Key words

IceCube Neutrino Observatory,Neutrino Detection

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