Our project MOMO (Multiwavelength observations and modeling of OJ 287) consists of dedicated, dense, long-term flux and spectroscopic monitoring, and deep follow-up observations of the blazar OJ 287 at >13 frequencies from the radio to the X-ray band since late 2015. In particular, we are using Swift to obtain optical-UV-X-ray spectral energy distributions (SEDs) and the Effelsberg telescope to obtain radio measurements between 2 and 40 GHz. MOMO is the densest long-term monitoring of OJ 287 involving X-rays and broad-band SEDs. The theoretical part of the project aims at understanding jet and accretion physics of the blazar central engine in general and the supermassive binary black hole scenario in particular. Results are presented in a sequence of publications and so far included: detection and detailed analysis of the bright 2016/17 and 2020 outbursts and the long-term light curve; Swift, XMM, and NuSTAR spectroscopy of the 2020 outburst around maximum; and interpretation of selected events in the context of the binary black hole scenario of OJ 287 (papers I–IV). Here, we provide a description of the project MOMO, a summary of previous results, the latest results, and we discuss future prospects.

中文翻译：

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MOMO 项目：OJ 287 的多波长观测和建模

我们的 MOMO 项目（OJ 287 的多波长观测和建模）包括专门的、密集的、长期的通量和光谱监测，以及对耀变体 OJ 287 在从无线电到 X 射线波段的 > 13 个频率上的深度跟踪观测自 2015 年底以来。特别是，我们正在使用 Swift 来获得光学-UV-X 射线光谱能量分布 (SED)，并使用埃菲尔斯堡望远镜来获得 2 至 40 GHz 之间的无线电测量。MOMO 是 OJ 287 最密集的长期监测，涉及 X 射线和宽带 SED。该项目的理论部分旨在了解一般的耀变体中央引擎的喷流和吸积物理学，特别是超大质量双黑洞场景。结果显示在一系列出版物中，迄今为止包括：2016/17和2020年明亮的爆发和长期光变曲线的检测和详细分析；2020 年爆发的 Swift、XMM 和 NuSTAR 光谱在最大值附近；以及在 OJ 287 的双黑洞场景背景下对选定事件的解释（论文 I-IV）。在这里，我们提供了 MOMO 项目的描述，之前结果的总结，最新的结果，我们讨论了未来的前景。