Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997abos.conf..611l&link_type=abstract
Conference Paper, Astronomical and Biochemical Origins and the Search for Life in the Universe, IAU Colloquium 161, Publisher: B
Astronomy and Astrophysics
Astronomy
Project Seti, Sky Surveys (Astronomy), Signal Detection, Extraterrestrial Life, Interstellar Space, Radio Telescopes, Narrowband, H Lines
Scientific paper
Project META II, a full-sky survey for artificial narrowband signals, has been conducted from one of the two 30-m radiotelescopes of the Instituto Argentino de Radioastronomia (IAR). The search was performed near the 1420-MHz line of neutral hydrogen, using a 8.4 million channels Fourier spectrometer of 0.05-Hz resolution and 400-kHz instantaneous bandwidth. The observing frequency was corrected both for motions with respect to three astronomical inertial frames, and for the effect of the Earth's rotation, which provides a characteristic changing signature for narrowband signals of extraterrestrial origin. Among the 2 x 10 exp 13 spectral channels analyzed, 29 extra statistical narrowband events exceeding the average threshold of 1.7 x 10 exp -23 W/sq m were found. The strongest signals that survive culling for terrestrial interference lie in or near the galactic plane. A description of the project META II observing scheme and results is made, as well as a possible interpretation of the results using the Cordes Lazio-Sagan model based on interstellar scattering theory.
Colomb Fernando R.
Hurrell E. E.
Lemarchand Guillermo A.
Olalde Juan C.
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