Receiver gain calibration for radio observations at the Waseda Nasu Pulsar Observatory

K. Niinuma, M. Kuniyoshi, N. Matsumura, K. Takefuji, S. Kida, A. Takeuchi, R. Nakamura, S. Suzuki, H. Ichikwa, K. Asuma, T. Daishido

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    6 Citations (Scopus)

    Abstract

    We have started programs at the Waseda Nasu Pulsar Observatory to identify EGRET γ-ray sources and to search for radio transients. The observed frequency was 1.4 ± 0.01 GHz, and eight-element spherical dish antennas were used as four pairs of interferometers, with each element 20 m in diameter. The observable region was ±5° from zenith, covering a region of sky 32° ≤ δ ≤ 42° in declination. For accurate flux measurement, we developed a receiver gain calibration system using Johnson-Nyquist noise; the system was compact, inexpensive, and easily maintained. We describe the system and recent results of radio source monitoring.

    Original languageEnglish
    Pages (from-to)112-121
    Number of pages10
    JournalPublications of the Astronomical Society of the Pacific
    Volume119
    Issue number851
    DOIs
    Publication statusPublished - 2007 Jan

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

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    Niinuma, K., Kuniyoshi, M., Matsumura, N., Takefuji, K., Kida, S., Takeuchi, A., Nakamura, R., Suzuki, S., Ichikwa, H., Asuma, K., & Daishido, T. (2007). Receiver gain calibration for radio observations at the Waseda Nasu Pulsar Observatory. Publications of the Astronomical Society of the Pacific, 119(851), 112-121. https://doi.org/10.1086/511388