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Exploring optical SETI's middle ground

机译:探索光学SETI的中间立场

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The Search for Extra-Terrestrial Intelligence (SETI) in optical wavelengths has recently concentrated either on detecting intense short light pulses that briefly outshine the background star or on finding unique features that stand out in the star's spectrum. But there is a middle ground available where the temporal variation of an optical SETI source would distinguish it from its stellar background. Initial results are presented for frequency-domain searches, covering a signal range of 1-10,000 Hz, with an instrument that simultaneously measures two broad optical spectral bands. It is shown that signals a thousand times fainter than the background starlight can be detected using this instrument coupled to a meter-class telescope. Since these signals can be either positive or negative (i.e. a periodic obscuration), the intriguing possibility exists of detecting signals where no energy need be intentionally beamed toward Earth.
机译:在光学波长中寻找外星智能(SETI)的工作,要么集中在检测使背景恒星短暂发光的强烈短光脉冲,要么集中在恒星光谱中脱颖而出。但是有一个中间的地方,光学SETI源的时间变化会将其与恒星背景区分开。提出了用于频域搜索的初步结果,该信号覆盖了1-10,000 Hz的信号范围,并且该仪器可以同时测量两个宽光谱带。结果表明,使用与米级望远镜耦合的仪器,可以检测到比背景星光微弱一千倍的信号。由于这些信号可以是正的也可以是负的(即周期性的模糊),因此存在检测不需要故意向地球发射能量的信号的有趣可能性。

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