Choice of optimal orientation of one or two cylindrical gravitational antennas

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cylindrical Antennas, Directional Antennas, Gravitational Wave Antennas, Instrument Orientation, Antenna Design, Astronomy, Optimization

Scientific paper

The optimal orientation of one or two cylindrical resonant antennas for the detection of unpolarized gravitational radiation emitted from a given region of the celestial sphere is considered. Examination of the angular radiation pattern of a single cylindrical antenna and its interaction with a gravitational wave results in curves relating optimal orientation angle of the cylinder axis with respect to the east-west direction to the declination of the source and the latitude of the antenna. The regions of the celestial sphere covered by various orientations of a single telescope are illustrated. Attention is then given to the optimal orientation of two cylindrical resonant antennas operating in coincidence, and two numerical algorithms for calculating them are presented. Possible sources of gravitational signals detectable with present or future antennas are also considered.

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