Speaker
Description
The Extreme Universe Space Observatory on a Super Pressure Balloon 2 (EUSO-SPB2) mission launched from Wanaka New Zealand on May 13 2023. The onboard Cherenkov Telescope (CT) was pointed just below Earth's horizon to conduct Target of Opportunity (ToO) observations, in order to follow up on possible sources of >10PeV neutrinos. For these observations, the earth is used as a tau-neutrino to tau-lepton converter, and the CT searches for optical signals from extensive air showers induced by tau-lepton decays. The EUSO-SPB2 mission lasted ~36h due to a leak in the balloon, resulting in a loss of the payload in the Pacific Ocean. In this contribution, we will present possible neutrino source candidates that crossed the CT's field of view of 6.4° x 12.8° during the two nights of observation, and their associated neutrino fluence limits. These observations demonstrate the viability of conducting ToO follow-up observations from a near space environment. We will present our new software tool designed for scheduling observations, the Neutrino Target Scheduler, and our prospects for conducting ToO searches with the future mission POEMMA Balloon with Radio, a scaled-down version of the Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) design.
| Collaboration(s) | JEM-EUSO |
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