Periodicity significance testing with null-signal templates: reassessment of PTF's SMBH binary candidates
利用无信号模板检验周期显著性:重新评估 PTF 超大质量黑洞双星候选
Periodograms are widely employed for identifying periodicity in time series data, yet they often struggle to accurately quantify the statistical significance of detected periodic signals when the data complexity precludes reliable simulations. We develop a data-driven approach to address this challenge by introducing a null-signal template (NST). The NST is created by carefully randomizing the period of each cycle in the periodogram template, rendering it non-periodic. It…