The Automatic Radio Burst Search System at Nasu Observatory

Details The Automatic Radio Burst Search System at Nasu Observatory The Automatic Radio Burst Search System at Nasu Observatory

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..12e..60k&link_type=abstract

Long Wavelength Astrophysics, 26th meeting of the IAU, Joint Discussion 12, 21 August 2006, Prague, Czech Republic, JD12, #60

Astronomy and Astrophysics

Astrophysics

Scientific paper

Eight 20 m diameter fixed spherical antennas at 1.4 GHz (see Fig. 1) were completed in 2003 in Nasushiobara, Tochigi prefecture, in Japan to search full-time for radio transients, which are expected in the earliest LWA observations. The antennas are arranged in a line from east to west. The half-power beamwidth (HPBW) of a 20 m antenna is approximately 0.8°, and using an asymmetric subreflector that is rotatable around an azimuth axis, it covers the declination region 36°55'±5°. Four pairs of antennas enable us to set four fringe beams simultaneously to four different declinations within 32°<δ< 42°. In order to search for radio bursts in the observed fringe data, we have developed an automatic radio burst search system in the C++ programming language (see Fig. 2) that consists of the fringe finding algorithm and the burst search processing. The fringe finding algorithm has a role of detection of fringes in the observed data. The burst search processing finds radio transients using the results of the fringe finding algorithm. Some new radio transients begin to be detected with the burst search system. We will report the automatic radio burst search system and some new detected radio transients in this conference.

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