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T: Fachverband Teilchenphysik
T 84: Methods of astroparticle physics V
T 84.3: Vortrag
Donnerstag, 2. April 2020, 17:00–17:15, L-3.001
Radio reflections on clouds as a potential background for cosmic ray radio detection — •Carina Kanitz1, Ilse Plaisier1,2, and Anna Nelles1,2 — 1Friedrich-Alexander-Universität Erlangen-Nürnberg, ECAP, Erwin-Rommel-Str. 1, 91058 Erlangen — 2DESY, Platanenallee 6, 15738, Zeuthen, Germany
The successful radio-triggered detection of cosmic air showers with measurements at the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA) illustrates again the opportunities for cosmic ray detection with radio telescopes.
While several background sources such as airplanes, stationary sources close to the array like A/C units of the data processing shelter and nearby cities were identified, rejected by triggers, and removed from the data, a strong source of radio signals at an elevation angle of 15° could not be identified, as no known emitting objects lie in this direction. An incorrectly reconstructed arrival direction has been excluded.
We investigate the possibility of this signal being caused by radio signals from nearby towns reflected off clouds into the array. This is studied in radio propagation simulations and in a correlation search of measured radio signals with atmospheric data. We will report on first results.