Radio source SHGb02+14a

Radio source SHGb02+14a

Radio source SHGb02+14a is a source and a candidate in the Search for Extra-Terrestrial Intelligence (SETI), discovered on March 2003 by SETI@home and announced in "New Scientist" on September 1, 2004. [* cite news | publisher = New Scientist | title = Mysterious signals from light years away | url = http://www.newscientist.com/article.ns?id=dn6341 | last = Reich | first = Euginie | date = 2004-09-01 | accessdate = 2006-06-12]

The source was observed three times at a frequency of about 1420 MHz, [cite web | publisher = SETI@home | url = http://seticlassic.ssl.berkeley.edu/Candidates/SHGb02+14a/SHGb02+14a.html | title = Gaussian Candidate SHGb02+14a | accessdate = 2006-06-12] which is expected to be a frequency used by extraterrestrials due to its proximity to one of the main frequencies at which hydrogen absorbs and radiates photons.

There are a number of puzzling features of this candidate, which have led to a large amount of skepticism. The source is located between the constellations Pisces and Aries, a direction in which no stars are observed within 1000 light years. It is also a very weak signal. The frequency of the signal has a rapid drift, which would correspond to it being emitted from a planet orbiting nearly 40 times faster than the Earth around the sun. However, each time the signal was detected, it was again at about 1420 MHz, the original frequency before any drift.

There are also a number of potential explanations for this signal. SETI@home has denied media reports of likely extraterrestrial signal. [cite news | publisher = The Planetary Society | title = SETI@home Leaders Deny Reports of Likely Extraterrestrial Signal | url = http://planetary.org/news/2004/0902_SETIhome_Leaders_Deny_Reports_of.html | date = 2004-09-02 | last = Alexander | first = Amir | accessdate = 2006-06-12] [cite news | publisher = BBC News | url = http://news.bbc.co.uk/1/hi/sci/tech/3621608.stm | title = Astronomers deny ET signal report | date = 2004-09-02 | first = David | last = Whitehouse | accessdate = 2006-06-12] It could be an artifact of random chance, cosmic noise or possibly just a glitch in the technology.

References and notes

External links

* [http://www.satsig.net/seticalc.htm SETI range calculator]


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