Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7091
Title: A search for QPOs in the lazar OJ287: preliminary results from the 2015/2016 observing campaign
Authors: 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 Gómez, 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.
Gopinathan, M
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
and 29 authors
Keywords: Galaxies: active;BL lacertae objects: individual (OJ287);Supermassive black holes
Issue Date: 2016
Publisher: Molecular Diversity Preservation International
Citation: Galaxies, Vol. 4, No. 4, 41
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.
URI: http://hdl.handle.net/2248/7091
ISSN: 2075-4434
???metadata.dc.rights???: © Molecular Diversity Preservation International
???metadata.dc.relation.uri???: http://dx.doi.org/10.3390/galaxies4040041
Appears in Collections:IIAP Publications

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