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Vorlage:Infobox Telescope

Bleien Radio Observatory is a radio astronomy observatory located half-way between Zurich and Bern in Switzerland. Its focus is on large bandwidth radio spectroscopy. The observatory is located near the village of Bleien, 5 km south of Gränichen in (Aargau). The place is in a shallow valley that is relatively well protected against terrestrial interference.[1]

The observatory was build in 1979 by the ETH Zurich under the guidance of Prof. Dr. Arnold Benz. Scine that time it consists of two parabolic antennae of 7 m and 5 m diameter separated by 100 m and a lab building containing the spectrometers and other electronics. For the first time, a fully digitized and remotly controlled receiver was used[2]. Initially frequency-agile spectrometers were used. Now digital filterbanks and and FFT (Fast Fourier transform) spektrometers are in operation[3]. The initital frequency range of 100 - 1000 MHz was enlarged to 10 MHz - 5 GHz. This range was the largest for solar radio observations since 2005. The observatory was converted in 2015 to observe non-solar radiation of extragalactic and cosmological origin.

The primary goal was the observation of radio emissions of solar flares. The most significant contribution was the survey and classification at decimeter wavelength[4] [5]. It served to investigate the acceleration of energetic electrons in solar flares. The broad bandwidth was also used to study non-solar radio emissions of gamma-ray bursts and to search for FRTs (Extragalactic Fast Radio Transients).

The solar data since 1979 and the instrument descriptions are stored at Fachhochschule Nordwestschweiz FHNW gespeichert and are public.[6] The Bleien Radio Observatory is part of the international e-CALLISTO network[7] that surveys the solar activity and space weather in radio waves.

  1. Committee on Radio Astronomy Frequencies, http://www.craf.eu/swibl.htm
  2. M.R. Perrenoud, The Computer-controlled Solar Radio Spectrometer "Ikarus", Solar Physics, 81, 197-203 (1982), http://solei80.cs.technik.fhnw.ch/solarradio/data/Descriptions/ikarus.pdf
  3. A.O. Benz, C. Monstein, M. Beverland, H. Meyer, B. Stuber, High Spectral Resolution Observation of Decimetric Radio Spikes Emitted by Solar Flares, Solar Physics, 260, 375-388 (2009), http://cdsads.u-strasbg.fr/abs/2009SoPh..260..375B
  4. M. Guedel and A.O. Benz, A catalogue of decimetric solar flare radio emission, Astronomy and Astrophysics Supplement, 75, 243-259 (1988), http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988A%26AS...75..243G&link_type=ARTICLE&db_key=AST&high=
  5. H. Isliker and A.O. Benz, Catalogue of 1-3 GHz solar flare radio emission, Astronomy and Astrophysics Supplement, 104, 145-160 (1994), http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994A%26AS..104..145I&link_type=ARTICLE&db_key=AST&high=
  6. Bleien Solar Radio Data, http://soleil.i4ds.ch/solarradio/
  7. e-CALLISTO, International Network of Solar Radio Spectrometers, http://www.e-callisto.org/

Category:Radio telescopes Category:Solar observatories Category:Gränichen Category:Buildings and structures in Canton of Aargau Category:ETH Zurich