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A high-sensitivity search for extraterrestrial intelligence at lambda 18 cmA targeted high-sensitivity search for narrow-band signals near a wavelength of 18 cm has been conducted using the 91-m radiotelescope of the National Radio Astronomy Observatory. The search included 201 nearby solar-type stars and achieved a frequency resolution of 5.5 Hz over a 1.4-MHz bandwidth. This high spectral resolution was obtained through a non-real-time reduction procedure using a Mark I VLBI recording terminal in conjunction with the CDC 7600 computational facility at the NASA-Ames Research Center. This is the first high-resolution search for narrow-band signals in this wavelength regime. To date it is the most sensitive search per unit observing time of any search strategy which does not postulate a unique magic frequency. Data show no evidence for narrow-band signals due to extraterrestrial intelligence at a 12-standard-deviation upper limit on signal strength of 1.1 x 10 to the -23rd W/sq m.
Document ID
19800053763
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Tarter, J.
(California, University Berkeley, Calif., United States)
Cuzzi, J.
(California Univ. Berkeley, CA, United States)
Black, D.
(NASA Ames Research Center Moffett Field, Calif., United States)
Clark, T.
(NASA Goddard Space Flight Center Radioastronomy Branch, Greenbelt, Md., United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1980
Publication Information
Publication: Icarus
Volume: 42
Subject Category
Space Sciences (General)
Accession Number
80A37933
Funding Number(s)
CONTRACT_GRANT: NSG-2271
CONTRACT_GRANT: NCA2-OR-050-702
Distribution Limits
Public
Copyright
Other

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