ET Signal The Real Story

EU researchers have recently identified subtle variations in the signal that had gone unnoticed during the initial investigation. These variations were too structured and too precise to be the result of mere Earth tech interference. Two groups working independently reached the same conclusion that BLC1 might not be interference after all. The signal's behavior was also unlike anything that could be detected in nature.

New telescope makes et technology signals easier to find.

SETI with SKA SKA, like ATA, will use the fact that, in the 3-degree FOV of the single elements, up to 10 1-arcmin beams can be synthesised and 10 stars observed. This can be going on, ‘piggy-back’, while the astronomy target is observed. Thus apart from the cost of the synthesiser, with its multiple target, wide band, narrow bandwidth, coverage, the SETI search comes for free. Of course, not all the sky will be covered with the astronomy pointings, so some dedicated fraction of observing time may also be needed to cover nearby, or specially interesting, stars. The default program is to have receivers with 0.01Hz frequency bins covering the 0.5-10 GHz band. This band is the quiet spectral region between the non- thermal galactic background and the atmospheric emission bands. With 100 seconds on each target (if the astronomy observation lasts longer, then new beams are made and new stars looked at), and 3 re-looks per star (to deal with false alarms), then one million stars can be observed within 10 years, with a sensitivity to see that Earth TV station at 3 pc. The main gains with SKA are the ability to cover one million stars, with an increased sensitivity. As discussed above, this means that for the first time
SETI with SKA 103 we would have some chance of catching a civilisation in its presumably brief radio-emitting phase. This chance will depend on the extent to which stars have habitable Earths, the extent to which each develop a civilisation, and the extent to which civilisations have radio emitters significantly more powerful than present day Earth ones (as practically all the SKA SETI stars will be significantly further away than 3 pc). SETI with SKA will be by far the most powerful SETI search ever un- dertaken, covering enough stars with enough sensitivity to probe significantly further towards those ‘Earth’-type civilisations. And also do a wider and deeper for search for those ‘other’-type civilisations.

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