SETI OBSERVATIONS OF EXOPLANETS WITH THE ALLEN TELESCOPE ARRAY
SETI OBSERVATIONS OF EXOPLANETS WITH THE ALLEN TELESCOPE ARRAY
复制标题
使用艾伦望远镜阵列进行地外行星搜寻 (SETI) 系外行星观测
DOI：
10.3847/0004-6256/152/6/181
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Blair
中科院分区：
文献类型：
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作者：
G. Harp;J. Richards;J. Tarter;J. Dreher;J. Jordan;S. Shostak;Ken Smolek;T. Kilsdonk;Bethany R. Wilcox;M. Wimberly;J. Ross;W. Barott;R. Ackermann;S. Blair
我们使用艾伦望远镜阵列（ATA）对大量已知的系外行星和其他附近的星星系统进行了无线电SETI观测。从2009年5月到2015年12月，进行了大约19000小时的观测。这次搜索的重点是来自总共9293颗恒星的窄带无线电信号，其中包括2015颗系外行星恒星和开普勒感兴趣的天体，以及另外65颗行星可能接近其可居住区的恒星。ATA观测是使用多个合成波束和反符合滤波器进行的，以帮助识别地面无线电干扰。在避开强地面通信频率的多个波段中，在1至9千兆赫的频率上观测恒星。对窄带（0.7-100 Hz）连续和脉冲信号的数据进行了近实时处理，发射器/接收器的相对加速度为-0.3至0.3 m s-2。在超过8 × 106星MHz的观测中，共检测到1.9 × 108个需要立即随访的独特信号。我们没有探测到来自地外技术的持续信号超过我们的频率依赖灵敏度阈值180-310 × 10−26 W m−2。
We report radio SETI observations on a large number of known exoplanets and other nearby star systems using the Allen Telescope Array (ATA). Observations were made over about 19000 hr from 2009 May to 2015 December. This search focused on narrowband radio signals from a set totaling 9293 stars, including 2015 exoplanet stars and Kepler objects of interest and an additional 65 whose planets may be close to their habitable zones. The ATA observations were made using multiple synthesized beams and an anticoincidence filter to help identify terrestrial radio interference. Stars were observed over frequencies from 1 to 9 GHz in multiple bands that avoid strong terrestrial communication frequencies. Data were processed in near-real time for narrowband (0.7–100 Hz) continuous and pulsed signals with transmitter/receiver relative accelerations from −0.3 to 0.3 m s−2. A total of 1.9 × 108 unique signals requiring immediate follow-up were detected in observations covering more than 8 × 106 star-MHz. We detected no persistent signals from extraterrestrial technology exceeding our frequency-dependent sensitivity threshold of 180–310 × 10−26 W m−2.