On the timing of an interstellar communication

Details On the timing of an interstellar communication On the timing of an interstellar communication

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...32..464m&link_type=abstract

Icarus, vol. 32, Dec. 1977, p. 464-470.

Statistics

3

Clocks, Interstellar Communication, Time Measurement, Extraterrestrial Communication, Light Curve, Novae, Signal Reception, Variable Stars

Scientific paper

By considering prominent events that are observable from both earth and nearby stellar systems it is possible to establish common clocks that may be useful in estimating arrival times for signals of intelligent extraterrestrial origin. The geometry and statistics of a timing strategy are developed together with quantitative estimates of its effectiveness and limits on its application. Effectiveness is measured by comparing the timing strategy with one randomized in time. Limitations arise from inaccuracies inherent in the determination of stellar parallaxes and result in standard deviations of the order of weeks to months for time estimates. The problem can be alleviated by choosing clocks close to Sender in angular distance. Signal opportunities for several nearby sun-like stars are calculated using the bright Nova Cygni 1975 as a clock.

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