We present multiwavelength light curves and polarimetric data of the Flat Spectrum Radio Quasar 3C 273 over 8 yr. The wavelength range of our data set extends from radio to gamma-rays. We found that the optical emission in this source is dominated by the accretion disc during the entire time-frame of study. We additionally find that in contrast with the observed behaviour in other blazars, 3C 273 does not show a correlation between the gamma-ray spectral index and the gamma-ray luminosity. Finally, we identified an anticorrelation between the 15 GHz and V-band light curves for the time-range JD 245 = 4860-5760, which we speculate is the consequence of the inner part of the accretion disc falling into the black hole, followed by the ejection of a component into the jet.

中文翻译：

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耀变体 3C 273 变异性的多波长分析

我们展示了平谱射电类星体 3C 273 8 年来的多波长光变曲线和偏振数据。我们数据集的波长范围从无线电扩展到伽马射线。我们发现在整个研究时间范围内，该源的光发射由吸积盘主导。我们还发现，与在其他耀变体中观察到的行为相比，3C 273 没有显示伽马射线光谱指数和伽马射线光度之间的相关性。最后，我们确定了时间范围 JD 245 = 4860-5760 的 15 GHz 和 V 波段光变曲线之间的反相关，我们推测这是吸积盘内部落入黑洞的结果，其次是将组件喷射到射流中。