标题： 光学SETI观测的异常恒星KIC 8462852 显示英文标题

标题： Optical SETI Observations of the Anomalous Star KIC 8462852

摘要： 为了探索开普勒-8462852（KIC 8462852）非周期性变暗是由轨道上的人工巨型结构（Wright等，2015年）引起，而不是由诸如高度椭圆轨道上的彗星碎片等自然原因（Marengo等，2015年）引起的假设，我们搜索了来自KIC 8462852的电磁信号，以寻找地外智能的迹象。 主要观测是在巴拿马Boquete光学SETI天文台的可见光光学范围内进行的。 此外，作为未来可能检测到候选信号的预备工作（Heidmann 1991），在加利福尼亚的Allen望远镜阵列中，有三次观测运行同时搜索了无线电频率。在25纳秒的时间范围内，没有观察到超过67个光子/m²的周期性光学信号。这个限制对应于8E22焦耳的各向同性光学脉冲。 然而，如果KIC 8462852的任何居民正在针对我们的太阳系（Shostak & Villard 2004），所需的能量将会大大降低。 窄带射电波段的限制分别为1GHz和8GHz时为180-300 Jy Hz，这相当于距离KIC 8462852处有效各向同性辐射功率为4E15 W（和7E15 W）的发射器。 尽管这些功率要求很高，但即使是适度的定向传输也可能会像光学信号一样显著降低这些数字。 显示英文摘要

摘要： To explore the hypothesis that KIC 8462852's aperiodic dimming is caused by artificial megastructures in orbit (Wright et al. 2015), rather than a natural cause such as cometary fragments in a highly elliptical orbit (Marengo et al. 2015), we searched for electromagnetic signals from KIC 8462852 indicative of extraterrestrial intelligence. The primary observations were in the visible optical regime using the Boquete Optical SETI Observatory in Panama. In addition, as a preparatory exercise for the possible future detection of a candidate signal (Heidmann 1991), three of six observing runs simultaneously searched radio frequencies at the Allen Telescope Array in California. No periodic optical signals greater than 67 photons/m2 within a time frame of 25 ns were seen. This limit corresponds to isotropic optical pulses of 8E22 joules. If, however, any inhabitants of KIC 8462852 were targeting our solar system (Shostak & Villard 2004), the required energy would be reduced greatly. The limits on narrowband radio signals were 180 - 300 Jy Hz at 1 and 8 GHz, respectively, corresponding to a transmitter with an effective isotropic radiated power of 4E15 W (and 7E15 W) at the distance of KIC 8462852. While these powers requirements are high, even modest targeting could - just as for optical signals - lower these numbers substantially.