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

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)


    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
    Issue number851
    Publication statusPublished - 2007 Jan

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Fingerprint Dive into the research topics of 'Receiver gain calibration for radio observations at the Waseda Nasu Pulsar Observatory'. Together they form a unique fingerprint.

    Cite this