Solar flare observations with the Radio Neutrino Observatory Greenland (RNO-G) ...

• Main Authors: Agarwal, S., Aguilar, J. A., Ali, S., Allison, P., Betts, M., Besson, D., Bishop, A., Botner, O., Bouma, S., Buitink, S., Cataldo, M., Clark, B. A., Coleman, A., Couberly, K., de Kockere, S., de Vries, K. D., Deaconu, C., DuVernois, M. A., Glaser, C., Glüsenkamp, T., Hallgren, A., Hallmann, S., Hanson, J. C., Hendricks, B., Henrichs, J., Heyer, N., Hornhuber, C., Hughes, K., Karg, T., Karle, A., Kelley, J. L., Korntheuer, M., Kowalski, Marek, Kravchenko, I., Krebs, R., Lahmann, R., Latif, U., Laub, P., Liu, C.-H., Marsee, M. J., Meyers, Z. S., Mikhailova, M., Monstein, C., Mulrey, K., Muzio, M., Nelles, A., Novikov, A., Nozdrina, A., Oberla, E., Oeyen, B.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Deutsches Elektronen-Synchrotron, DESY, Hamburg 2024
• Subjects: 540; Solar flares; Radio telescopes; UHE neutrinos; Calibration; Greenland
• Online Access: https://dx.doi.org/10.3204/pubdb-2024-05422; https://bib-pubdb1.desy.de/record/612705

Astroparticle physics 164, 103024 (2024). doi:10.1016/j.astropartphys.2024.103024 ... : The Radio Neutrino Observatory – Greenland (RNO-G) seeks discovery of ultra-high energy neutrinos from the cosmos through their interactions in ice. The science program extends beyond particle astrophysics to include radioglaciology and, as we show herein, solar observations, as well. Currently seven of 35 planned radio-receiver stations (24 antennas/station) are operational. These stations are sensitive to impulsive radio signals with frequencies between 80 and 700 MHz and feature a neutrino trigger threshold for recording data close to the thermal floor. RNO-G can also trigger on elevated signals from the Sun, resulting in nanosecond resolution time-domain flare data; such temporal resolution is significantly shorter than from most dedicated solar observatories. In addition to possible RNO-G solar flare polarization measurements, the Sun also represents an extremely useful above-surface calibration source.Using RNO-G data recorded during the summers of 2022 and 2023, we find signal excesses during solar ...