The Benfords suggest a continuous signal blared at thousands of stars would simply cost too much energy. They say aliens might use short bursts say, anywhere from a second to an hour long and point these signals in narrow beams at one star and then another in a cycle involving up to thousands of stars that repeats over days or years.For civilizations that constantly watch the skies, the bursts would convey enough data to be recognized as undeniably artificial. As observant civilizations concentrated on this simple beacon, other beacons could broadcast more complex data at lower power (assuming the aliens were still pursuing a frugal strategy).
If I don't expose the 'stupid' then who will? Oh right...the smarter people.
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