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

doi:10.1086/511388

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 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 language	English
Pages (from-to)	112-121
Number of pages	10
Journal	Publications of the Astronomical Society of the Pacific
Volume	119
Issue number	851
DOIs	https://doi.org/10.1086/511388
Publication status	Published - 2007 Jan

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "Receiver gain calibration for radio observations at the Waseda Nasu Pulsar Observatory",

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.",

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

year = "2007",

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doi = "10.1086/511388",

language = "English",

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pages = "112--121",

journal = "Publications of the Astronomical Society of the Pacific",

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T1 - Receiver gain calibration for radio observations at the Waseda Nasu Pulsar Observatory

AU - Niinuma, K.

AU - Kuniyoshi, M.

AU - Matsumura, N.

AU - Takefuji, K.

AU - Kida, S.

AU - Takeuchi, A.

AU - Nakamura, R.

AU - Suzuki, S.

AU - Ichikwa, H.

AU - Asuma, K.

AU - Daishido, T.

PY - 2007/1

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AB - 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.

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

Abstract

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