Electromagnetic and gravitational radiation of blazar OJ 287 by Alexandr Volvach, Larisa Volvach, Mikhail Larionov

“…The structure and dynamics of SMBHs and their interaction with the accretion disk are considered. It is shown that OJ 287 may be the most massive close binary SMBH with comparable masses. …”
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Project MOMO: Multiwavelength Observations and Modeling of OJ 287 by S. Komossa, D. Grupe, A. Kraus, L. C. Gallo, A. G. Gonzalez, M. L. Parker, M. J. Valtonen, A. R. Hollett, U. Bach, J. L. Gómez, I. Myserlis, S. Ciprini

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Is OJ 287 a Single Supermassive Black Hole? by Marina S. Butuzova, Alexander B. Pushkarev

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Precession-induced Variability in AGN Jets and OJ 287 by Silke Britzen, Michal Zajaček, Gopal-Krishna, Christian Fendt, Emma Kun, Frédéric Jaron, Aimo Sillanpää, Andreas Eckart

“…We demonstrate this modulating power of precession for OJ 287. For the first time, we show that the spectral state of the spectral energy distribution (SED) can be directly related to the jet’s precession phase. …”
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Correlation Analysis between OJ 287 Radio Jet Observables by Q. Yuan, M. Zhang, X. Liu, P. F. Jiang, G. I. Kokhirova

“…We collected the archival data of blazar OJ 287 from heterogeneous very long baseline interferometry monitoring programs at 2.3, 8.6, 15, and 43 GHz. …”
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Promise of Persistent Multi-Messenger Astronomy with the Blazar OJ 287 by Mauri J. Valtonen, Lankeswar Dey, Achamveedu Gopakumar, Staszek Zola, S. Komossa, Tapio Pursimo, Jose L. Gomez, Rene Hudec, Helen Jermak, Andrei V. Berdyugin

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Rapid Optical Flares in the Blazar OJ 287 on Intraday Timescales with TESS by Shubham Kishore, Alok C. Gupta, Paul J. Wiita

“…We have analyzed the optical light curves of the blazar OJ 287 obtained with the Transiting Exoplanet Survey Satellite over about 80 days from 2021 October 13 to December 31, with an unprecedented sampling of 2 minutes. …”
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PROPERTY STUDY OF OJ 287 AND BL LAC VARIABILITY IN OPTICALAND RADIO RANGES by A. L. Sukharev, M. I. Ryabov, V. V. Bezrukovs

“…Purpose: Interrelation and difference in the appearance of quasiperiodic activity of BL-Lac objects OJ 287 and BL Lac is investigated according to optical and radio observations. …”
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Temporal and Spectral Variability of OJ 287 before the April–June 2020 Outburst by Nibedita Kalita, Alok C. Gupta, Minfeng Gu

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Toward Microarcsecond Astrometry for the Innermost Wobbling Jet of the BL Lacertae Object OJ 287 by Xiaopeng Cheng, Jun Yang, Guang-Yao Zhao, Bong Won Sohn, Taehyun Jung, Xiaofeng Li

“…The BL Lacertae object OJ 287 is a very unusual quasar producing a wobbling radio jet and some double-peaked optical outbursts with a possible period of about 12 yr for more than one century. …”
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The Unique Blazar OJ 287 and Its Massive Binary Black Hole Central Engine by Lankeswar Dey, Achamveedu Gopakumar, Mauri Valtonen, Stanislaw Zola, Abhimanyu Susobhanan, Rene Hudec, Pauli Pihajoki, Tapio Pursimo, Andrei Berdyugin, Vilppu Piirola, Stefano Ciprini, Kari Nilsson, Helen Jermak, Mark Kidger, Stefanie Komossa

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Observational Implications of OJ 287’s Predicted 2022 Disk Impact in the Black Hole Binary Model by Mauri J. Valtonen, Lankeswar Dey, Achamveedu Gopakumar, Staszek Zola, Anne Lähteenmäki, Merja Tornikoski, Alok C. Gupta, Tapio Pursimo, Emil Knudstrup, Jose L. Gomez, Rene Hudec, Martin Jelínek, Jan Štrobl, Andrei V. Berdyugin, Stefano Ciprini, Daniel E. Reichart, Vladimir V. Kouprianov, Katsura Matsumoto, Marek Drozdz, Markus Mugrauer, Alberto Sadun, Michal Zejmo, Aimo Sillanpää, Harry J. Lehto, Kari Nilsson, Ryo Imazawa, Makoto Uemura

Subjects: “…BL Lacertae objects: individual: OJ 287…”
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The First Robust Evidence Showing a Dark Matter Density Spike Around the Supermassive Black Hole in OJ 287 by Man Ho Chan, Chak Man Lee

“…We revisit the data of the well-known SMBH binary OJ 287 and show that the inclusion of the dynamical friction due to a dark matter density spike around the SMBH can satisfactorily account for the observed orbital decay rate. …”
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K2 Optical Emission from OJ 287 and Other γ-Ray Blazars on Hours-to-weeks Timescales from 2014 to 2018 by Ann E. Wehrle, Michael Carini, Paul J. Wiita, Joshua Pepper, B. Scott Gaudi, Richard W. Pogge, Keivan G. Stassun, Steven Villanueva Jr.

“…We present second observations by K2 of OJ 287 and seven other γ -ray active galactic nuclei (AGNs) obtained in 2017–2018, second and third observations of the lobe-dominated, steep-spectrum quasar 3C 207, and observations of nine additional blazars not previously observed with K2. …”
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Quasi-simultaneous Optical Flux and Polarization Variability of the Binary Super Massive Black Hole Blazar OJ 287 from 2015 to 2023: Detection of an Anticorrelation in Flux and Polarization Variability by Alok C. Gupta, Pankaj Kushwaha, Mauri J. Valtonen, Sergey S. Savchenko, Svetlana G. Jorstad, Ryo Imazawa, Paul J. Wiita, Minfeng Gu, Alan P. Marscher, Zhongli Zhang, Rumen Bachev, G. A. Borman, Haritma Gaur, T. S. Grishina, V. A. Hagen-Thorn, E. N. Kopatskaya, V. M. Larionov, E. G. Larionova, L. V. Larionova, D. A. Morozova, T. Nakaoka, A. Strigachev, Yulia V. Troitskaya, I. S. Troitsky, M. Uemura, A. A. Vasilyev, Z. R. Weaver, A. V. Zhovtan

“…This is one of the most extensive quasi-simultaneous optical flux and polarization variability studies of OJ 287. OJ 287 showed large amplitude, ∼3.0 mag flux variability, large changes of ∼37% in degree of polarization, and a large swing of ∼215° in the angle of the electric vector of polarization. …”
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A Comparative Study of Multiwavelength Blazar Variability on Decades to Minutes Timescales by Arti Goyal

Subjects: “…BL Lacertae objects: individual (PKS 0735+178, OJ 287)…”
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MOMO. VI. Multifrequency Radio Variability of the Blazar OJ 287 from 2015 to 2022, Absence of Predicted 2021 Precursor-flare Activity, and a New Binary Interpretation of the 2016/2017 Outburst by S. Komossa, A. Kraus, D. Grupe, A. G. Gonzalez, M. A. Gurwell, L. C. Gallo, F. K. Liu, I. Myserlis, T. P. Krichbaum, S. Laine, U. Bach, J. L. Gómez, M. L. Parker, S. Yao, M. Berton

“…Based on our dedicated Swift monitoring program, MOMO, OJ 287 is one of the best-monitored blazars in the X-ray–UV–optical regime. …”
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Multi-wavelength Study of Blazars Using Variability as a Tool by Kiran S. Baliyan, Navpreet Kaur, Sunil Chandra, Sameer, Shashikiran Ganesh

“…Abu infrared observatory (MIRO) blazar monitoring program, we present intra-night, inter-night, and long term aspects of the variability in S5 0716+71, 3C66A, and OJ 287. These stars show significant variability on short (a few tens of mins, to a few hours, to a few days) to long term (months to years) timescales. …”
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CATALOG OF VARIABILITY PERIODS OF EXTRAGALACTIC RADIO SOURCES AT CENTIMETER WAVELENGTHS by M. I. Ryabov, A. L. Sukharev, H. I. Donskykh

“…Purpose: Study of the variability of flux density of extragalactic radio sources (3C 273, 3C 120, 3C 345, 3C 446, 3C 454.3, OJ 287, OT 081, BL Lac, DA 55, CTA 102) according to a long-term (1965–2011) monitoring at 14.5, 8, 4.8 GHz made with a 26-m telescope of the University of Michigan. …”
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EMRI + TDE = QPE: Periodic X-Ray Flares from Star–Disk Collisions in Galactic Nuclei by Itai Linial, Brian D. Metzger

“…Our model can also be applied to black hole–disk collisions, such as those invoked in the context of the candidate SMBH binary OJ 287.…”
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