A search for QPOs in the lazar OJ287: preliminary results from the 2015/2016 observing campaign

Zola, S; Valtonen, M; Bhatta, G; Goyal, A; Debski, B; Baran, A; Krzesinski, J; Siwak, M; Ciprini, S; Gopakumar, A; Jermak, H; Nilsson, K; Reichart, D; Matsumoto, K; Sadakane, K; Gazeas, K; Kidger, M; Piirola, V; Alicavus, F; Baliyan, K. S; Berdyugin, A; Boyd, D; Campas Torrent, M; Campos, F; Carrillo G-mez, J; Caton, D. B; Chavushyan, V; Dalessio, J; Dimitrov, D; Drozdz, M; Er, H; Erdem, A; Escartin Perez, A; Fallah Ramazani, V; Filippenko, A. V; Garcia, F; Gomez Pinilla, F; Maheswar, G; Haislip, J. B; Harmanen, J; Hudec, R; Hurst, G; Ivarsen, K. M; Jelinek, M; Joshi, A; Kagitan, M; Kaur, N; Keel, W. C; LaCluyze, A. P; Lee, B. C; Lindfors, E; Lozano de Haro, J; Moore, J. P; Mugrauer, M; Naves Nogues, R; Neely, A. W; Nelson, R. H; Ogloza, W; Okano, S; Pandey, J. C; Perri, M; Pihajoki, P; Poyner, G; Provencal, J; Pursimo, T; Raj, A; 29 others

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dc.contributor.author	Zola, S
dc.contributor.author	Valtonen, M
dc.contributor.author	Bhatta, G
dc.contributor.author	Goyal, A
dc.contributor.author	Debski, B
dc.contributor.author	Baran, A
dc.contributor.author	Krzesinski, J
dc.contributor.author	Siwak, M
dc.contributor.author	Ciprini, S
dc.contributor.author	Gopakumar, A
dc.contributor.author	Jermak, H
dc.contributor.author	Nilsson, K
dc.contributor.author	Reichart, D
dc.contributor.author	Matsumoto, K
dc.contributor.author	Sadakane, K
dc.contributor.author	Gazeas, K
dc.contributor.author	Kidger, M
dc.contributor.author	Piirola, V
dc.contributor.author	Alicavus, F
dc.contributor.author	Baliyan, K. S
dc.contributor.author	Berdyugin, A
dc.contributor.author	Boyd, D
dc.contributor.author	Campas Torrent, M
dc.contributor.author	Campos, F
dc.contributor.author	Carrillo G-mez, J
dc.contributor.author	Caton, D. B
dc.contributor.author	Chavushyan, V
dc.contributor.author	Dalessio, J
dc.contributor.author	Dimitrov, D
dc.contributor.author	Drozdz, M
dc.contributor.author	Er, H
dc.contributor.author	Erdem, A
dc.contributor.author	Escartin Perez, A
dc.contributor.author	Fallah Ramazani, V
dc.contributor.author	Filippenko, A. V
dc.contributor.author	Garcia, F
dc.contributor.author	Gomez Pinilla, F
dc.contributor.author	Maheswar, G
dc.contributor.author	Haislip, J. B
dc.contributor.author	Harmanen, J
dc.contributor.author	Hudec, R
dc.contributor.author	Hurst, G
dc.contributor.author	Ivarsen, K. M
dc.contributor.author	Jelinek, M
dc.contributor.author	Joshi, A
dc.contributor.author	Kagitan, M
dc.contributor.author	Kaur, N
dc.contributor.author	Keel, W. C
dc.contributor.author	LaCluyze, A. P
dc.contributor.author	Lee, B. C
dc.contributor.author	Lindfors, E
dc.contributor.author	Lozano de Haro, J
dc.contributor.author	Moore, J. P
dc.contributor.author	Mugrauer, M
dc.contributor.author	Naves Nogues, R
dc.contributor.author	Neely, A. W
dc.contributor.author	Nelson, R. H
dc.contributor.author	Ogloza, W
dc.contributor.author	Okano, S
dc.contributor.author	Pandey, J. C
dc.contributor.author	Perri, M
dc.contributor.author	Pihajoki, P
dc.contributor.author	Poyner, G
dc.contributor.author	Provencal, J
dc.contributor.author	Pursimo, T
dc.contributor.author	Raj, A
dc.contributor.author	29 others
dc.date.accessioned	2020-11-17T14:20:12Z
dc.date.available	2020-11-17T14:20:12Z
dc.date.issued	2016-12
dc.identifier.citation	Galaxies, Vol. 4, No. 4, 41	en_US
dc.identifier.issn	2075-4434
dc.identifier.uri	http://prints.iiap.res.in/handle/2248/7142
dc.description	Open Access © Molecular Diversity Preservation International http://dx.doi.org/10.3390/galaxies4040041	en_US
dc.description.abstract	We analyse the light curve in the R band of the blazar OJ287, gathered during the 2015/2016 observing season. We did a search for quasi-periodic oscillations (QPOs) using several methods over a wide range of timescales. No statistically significant periods were found in the high-frequency domain both in the ground-based data and in Kepler observations. In the longer-period domain, the Lomb–Scargle periodogram revealed several peaks above the 99% significance level. The longest one—about 95 days—corresponds to the innermost stable circular orbit (ISCO) period of the more massive black hole. The 43-day period could be an alias, or it can be attributed to accretion in the form of a two-armed spiral wave.	en_US
dc.language.iso	en	en_US
dc.publisher	Molecular Diversity Preservation International	en_US
dc.subject	Galaxies: active	en_US
dc.subject	BL lacertae objects: individual (OJ287)	en_US
dc.subject	Supermassive black holes	en_US
dc.title	A search for QPOs in the lazar OJ287: preliminary results from the 2015/2016 observing campaign	en_US
dc.type	Article	en_US