Logo image
The Extreme Universe Observatory on a super-pressure balloon II: Mission, payload, and flight
Journal article   Peer reviewed

The Extreme Universe Observatory on a super-pressure balloon II: Mission, payload, and flight

J. H. Adams Jr, D. Allard, P. Alldredge, L. Anchordoqui, A. Anzalone, M. Bagheri, M. Battisti, R. Bellotti, A.A. Belov, M. Bertaina, …
Astroparticle physics, Vol.182, 103263
10/2026
DOI: 10.1016/j.astropartphys.2026.103263

View Online

Abstract

The Extreme Universe Space Observatory on a Super Pressure Balloon 2 (EUSO-SPB2) is a pathfinder mission toward a space-based observatory such as the Probe of Extreme Multi-Messenger Astrophysics (POEMMA). The aim of POEMMA is the observation of Ultra High Energy Cosmic Rays (UHECRs) in order to elucidate their nature and origins and to discover ≳ 20 PeV very high energy neutrinos that originate from transient and steady astrophysical sources. EUSO-SPB2 was launched from Wānaka New Zealand on May 13th, 2023 as a NASA Balloon Program Office test flight. The mission goals included making the first near-space altitude observations of the fluorescence emission from UHECR-induced extensive air showers (EASs) and making the first direct Cherenkov light emission from PeV cosmic rays traversing Earth’s atmosphere. In addition, a Target of Opportunity program was developed for selecting and scheduling observations of potential neutrino sources as they passed just below the Earth’s limb. Although a leaky balloon forced termination over the Pacific Ocean after 37 h, data was collected to demonstrate the successful commissioning and operation of the instruments. This paper includes a description of the payload and the key instruments, pre-flight instrument characterizations in the lab and in the desert, flight operations and examples of the data collected. The flight was too short to catch a UHECR event via fluorescence, however about 10 candidate EAS events from cosmic rays were recorded via Cherenkov light.
Cherenkov technique Earth-skimming neutrinos Extensive air showers Fluorescence technique Super pressure balloon

Details

Metrics

1 Record Views
Logo image