论文标题
在2009-2018期间，光学到X射线频段中Blazar 3C 279的光谱变异性
Spectral variability of the blazar 3C 279 in the optical to X-ray band during 2009-2018
论文作者
论文摘要
我们报告了在MJD 55100和58400之间的光学到X射线频段中Blazar 3C 279的光谱变异性，在此期间观察到长期无线电可变性。我们在每个光学（$ 2 \ times10^{14} $ - $ 1.5 \ times10^{15} $ hz）和X射线（0.3-10 keV）频段中构造光曲线和频谱光谱，测量光谱参数（flux $ f $ f $ and Spectral Index $α$），并在$ f $和$ f $之间进行相关和$ f $ and $ f $ and and and $ f。我们发现，在$ \ sim $ MJD 55500之后，光学属性的相关性发生了巨大变化，光曲线在$ \ sim $ \ sim $ MJD 57700之后显示出更频繁的活动。因此，我们将基于三个状态的相关属性和分析三个状态分析的相关属性和源属性将三个“状态”分为三个“状态”。我们发现状态中的光谱参数与相对于状态2中X射线的光学发射的65天延迟之间的各种相关性（MJD 55500-57700）。我们尝试使用单区同步 - 孔子发射方案来解释这些发现。
We report on spectral variability of the blazar 3C 279 in the optical to X-ray band between MJD 55100 and 58400 during which long-term radio variability was observed. We construct light curves and band spectra in each of the optical ($2\times10^{14}$-$1.5\times10^{15}$ Hz) and X-ray (0.3-10 keV) bands, measure the spectral parameters (flux $F$ and spectral index $α$), and investigate correlation between $F$ and $α$ within and across the bands. We find that the correlation of the optical properties dramatically change after $\sim$MJD 55500 and the light curves show more frequent activity after $\sim$MJD 57700. We therefore divide the time interval into three "states" based on the correlation properties and source activity in the light curves, and analyze each of the three states separately. We find various correlations between the spectral parameters in the states and an intriguing 65-day delay of the optical emission with respect to the X-ray one in state 2 (MJD 55500-57700). We attempt to explain these findings using a one-zone synchro-Compton emission scenario.
