EGRET unidentified source radio observations and performance of receiver gain calibration

Kotaro Niinuma, Kuniyuki Asuma, Masaya Kuniyoshi, Nobuo Matsumura, Kazuhiro Takefuji, Sumiko Kida, Akihiko Takeuchi, Hajime Ichikawa, Akihiro Sawano, Naoya Yoshimura, Shigehiro Suzuki, Ryosuke Nakamura, Yu Nakayama, Tsuneaki Daishido

    Research output: Contribution to journalArticle

    Abstract

    Last year, we have developed the receiver gain calibration system by using Johnson-Nyquist noise, for accuracy flux measurement, because we have been starting radio identification program of transient radio sources, blazars and radio counterpart of The Energetic Gamma Ray Experiment Telescope (EGRET) unidentified γ-ray sources in Waseda Nasu Pulsar Observatory. It is shown that there are a few low correlation data between receiver gain and ambient temperature around receiver for anything troubles of receiver, because we can detect gain and ambient temperature through a day by developed system. Estimated fluctuations of daily data of steady sources decrease by removing low correlation data before analysing. As the result of our analysis by using above system, radio counterpart of EGRET identified source showed fading light-curve for a week.

    Original languageEnglish
    Pages (from-to)223-224
    Number of pages2
    JournalJournal of Physics: Conference Series
    Volume31
    Issue number1
    DOIs
    Publication statusPublished - 2006 Mar 22

    Fingerprint

    radio observation
    receivers
    gamma rays
    telescopes
    data correlation
    ambient temperature
    blazars
    fading
    pulsars
    light curve
    rays
    observatories
    temperature

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Niinuma, K., Asuma, K., Kuniyoshi, M., Matsumura, N., Takefuji, K., Kida, S., ... Daishido, T. (2006). EGRET unidentified source radio observations and performance of receiver gain calibration. Journal of Physics: Conference Series, 31(1), 223-224. https://doi.org/10.1088/1742-6596/31/1/064

    EGRET unidentified source radio observations and performance of receiver gain calibration. / Niinuma, Kotaro; Asuma, Kuniyuki; Kuniyoshi, Masaya; Matsumura, Nobuo; Takefuji, Kazuhiro; Kida, Sumiko; Takeuchi, Akihiko; Ichikawa, Hajime; Sawano, Akihiro; Yoshimura, Naoya; Suzuki, Shigehiro; Nakamura, Ryosuke; Nakayama, Yu; Daishido, Tsuneaki.

    In: Journal of Physics: Conference Series, Vol. 31, No. 1, 22.03.2006, p. 223-224.

    Research output: Contribution to journalArticle

    Niinuma, K, Asuma, K, Kuniyoshi, M, Matsumura, N, Takefuji, K, Kida, S, Takeuchi, A, Ichikawa, H, Sawano, A, Yoshimura, N, Suzuki, S, Nakamura, R, Nakayama, Y & Daishido, T 2006, 'EGRET unidentified source radio observations and performance of receiver gain calibration', Journal of Physics: Conference Series, vol. 31, no. 1, pp. 223-224. https://doi.org/10.1088/1742-6596/31/1/064
    Niinuma, Kotaro ; Asuma, Kuniyuki ; Kuniyoshi, Masaya ; Matsumura, Nobuo ; Takefuji, Kazuhiro ; Kida, Sumiko ; Takeuchi, Akihiko ; Ichikawa, Hajime ; Sawano, Akihiro ; Yoshimura, Naoya ; Suzuki, Shigehiro ; Nakamura, Ryosuke ; Nakayama, Yu ; Daishido, Tsuneaki. / EGRET unidentified source radio observations and performance of receiver gain calibration. In: Journal of Physics: Conference Series. 2006 ; Vol. 31, No. 1. pp. 223-224.
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