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A passive SETI in globular clusters at the hydroxyl and water lines |
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| Authors: | Nathaniel L Cohen Matthew A Malkan John M Dickey |
| Institution: | National Astronomy and Ionosphere Center, Cornell University, Ithaca, New York 14853, USA;Astronomy Department, California Institute of Technology, Pasadena, California 91103, USA;Five College Radio Astronomy Observatory, University of Massachusetts, Amherst, Massachusetts, 01003, USA |
| Abstract: | We describe an indirect or “passive” SETI in 25 globular clusters, observed for astronomical reasons at the water and hydroxyl lines. No beacon signals were found in a sample of up to 107 stars and upper limits to the maximum EIRPs of beacons were 1016–1021W. Ways of enhancing the value of other astronomical spectral line observing programs for SETI purposes are discussed. |
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