We present the results of the Fermi-Large Area Telescope 10 yr long light curve (LC) modeling of selected blazars: six flat-spectrum radio quasars (FSRQs) and five BL Lacertae (BL Lacs), examined in 7, 10, and 14 day binning. The LCs and power spectral densities (PSDs) were investigated with various methods: Fourier transform, Lomb–Scargle periodogram (LSP), wavelet scalogram, autoregressive moving average (ARMA) process, continuous-time ARMA (CARMA), Hurst exponent ( H ), and the ##IMG## [http://ej.iop.org/images/0067-0049/250/1/1/apjsaba2c7ieqn1.gif] {${ \mathcal A }\mbox{--}{ \mathcal T }$} plane. First, with extensive simulations we showed that parametric modeling returns unreliable parameters, with a high dispersion for different realizations of the same stochastic model. Hence, any such analysis should be supported with Monte Carlo simulations. For our blazar sample, we find that the power-law indices β calculated from the Fourier and LSP ...

中文翻译：

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天文时间序列的综合功率谱密度分析。I.精选布拉扎斯的费米-拉特伽马射线光曲线

我们介绍了费米大面积望远镜对选定的Blazar进行10年长光曲线（LC）建模的结果：在7、10和14中进行了检查，六个平谱无线电类星体（FSRQs）和五个BL Lacertae（BL Lacs）天分箱。使用多种方法研究了LC和功率谱密度（PSD）：傅里叶变换，Lomb-Scargle周期图（LSP），小波比例尺图，自回归移动平均值（ARMA）过程，连续时间ARMA（CARMA），赫斯特指数（H） ，以及## IMG ## [http://ej.iop.org/images/0067-0049/250/1/1/apjsaba2c7ieqn1.gif] {$ {\ mathcal A} \ mbox {-} {\ mathcal T} $}平面。首先，通过广泛的仿真，我们证明了参数化建模会返回不可靠的参数，并且对于同一随机模型的不同实现具有很高的分散性。因此，蒙特卡洛模拟应支持任何此类分析。对于我们的blazar样本，我们发现从傅立叶和LSP计算出的幂律指数β...