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CTA-102
In astronomy, CTA 102, also known by its B1950 coordinates as 2230+114 (QSR B2230+114) and its J2000 coordinates as J2232+1143 (QSO J2232+1143), is a quasar discovered in the early 1960s by a radio survey carried out by the California Institute of Technology.〔 It has been observed by a large range of instruments since its discovery, including WMAP, EGRET, GALEX, VSOP and Parkes,〔 and has been regularly imaged by the Very Long Baseline Array since 1995.〔(【引用サイトリンク】 title=MOJAVE Sample: 2230+114 )〕 It has also been detected in gamma rays, and a gamma-ray flare has been detected from it.
In 1963 Nikolai Kardashev proposed that the then-unidentified radio source could be evidence of a Type II or III extraterrestrial civilization on the Kardashev scale.〔 Follow-up observations were announced in 1965 by Gennady Sholomitskii, who found that the object's radio emission was varying; a public announcement of these results caused a worldwide sensation. The idea that the emission was caused by a civilization was rejected when the radio source was later identified as one of the many varieties of a quasar.〔(【引用サイトリンク】 title=CTA-102 )〕
CTA 102 is one of the two great false alarms in the history of SETI, the other being the discovery of pulsars, specifically PSR B1919+21, which are rotating neutron stars.
The American folk rock band The Byrds whimsically reflected the original view that CTA-102 was a sign of extraterrestrial intelligence in their song "C.T.A.-102" from their 1967 album ''Younger Than Yesterday''.
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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