The discovery rate of fast radio bursts (FRBs) is increasing dramatically thanks to new radio facilities. Meanwhile, wide-field instruments such as the 47 deg 2 Zwicky Transient Facility (ZTF) survey the optical sky to study transient and variable sources. We present serendipitous ZTF observations of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) repeating source FRB 180916.J0158+65 that was localized to a spiral galaxy 149 Mpc away and is the first FRB suggesting periodic modulation in its activity. While 147 ZTF exposures corresponded to expected high-activity periods of this FRB, no single ZTF exposure was at the same time as a CHIME detection. No >3 σ optical source was found at the FRB location in 683 ZTF exposures, totaling 5.69 hr of integration time. We combined ZTF upper limits and expected repetitions from FRB 180916.J0158+65 in a statistical framework using a Weibull distribution, agnostic of periodic modulation priors. The analysis yiel...

中文翻译：

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Zwicky瞬态设施限制了附近重复的FRB 180916.J0158 + 65的光发射

由于有了新的无线电设备，快速无线电脉冲串（FRB）的发现率正在急剧增加。同时，诸如47度2 Zwicky瞬态设施（ZTF）之类的广域仪器对天空进行了观测，以研究瞬态和可变光源。我们介绍了加拿大氢强度测绘实验（CHIME）重复源FRB 180916.J0158 + 65的偶然ZTF观测，该源定位在距离149 Mpc的螺旋星系中，这是第一个暗示其活动受到周期性调制的FRB。尽管147次ZTF暴露对应于该FRB的预期高活性期，但没有一次ZTF暴露与CHIME检测同时发生。在683次ZTF曝光中，在FRB位置未发现> 3σ的光源，累计时间为5.69 hr。我们结合了ZTF上限和FRB 180916的预期重复次数。在统计框架中使用Weibull分布的J0158 + 65，与周期调制先验无关。分析产量...