Receiver Gain Calibration for Radio Observations at the Waseda Nasu Pulsar Observatory

Details Receiver Gain Calibration for Radio Observations at the Waseda Nasu Pulsar Observatory Receiver Gain Calibration for Radio Observations at the Waseda Nasu Pulsar Observatory

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pasp..119..112n&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 119, Issue 851, pp. 112-121.

Astronomy and Astrophysics

Astronomy

5

Instrumentation: Interferometers

Scientific paper

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 32deg<=δ<=42deg 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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