Preprint Article Version 1 NOT YET PEER-REVIEWED

Search for QPOs in the Light Curve of the Blazar OJ287: Preliminary Results from 2015/16 Observing Campaign

Version 1 : Received: 16 July 2016 / Approved: 18 July 2016 / Online: 18 July 2016 (10:46:26 CEST)

A peer-reviewed article of this Preprint also exists.

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 Pérez, A.; Fallah Ramazani, V.; Filippenko, A.V.; Garcia, F.; Gómez Pinilla, F.; Gopinathan, M.; Haislip, J.B.;Harmanen, J.; Hudec, R.; Hurst, G.; Ivarsen, K.M.; Jelinek, M.; Joshi, A.; Kagitani, 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.; Reinthal, R.; Sadegi, S.; Sakanoi, T.; Sameer; Salto González, J.-L.; Schweyer, T.; Soldán Alfaro, F.C.; Karaman, N.; Sonbas, E.; Steele, I.; Stocke, J.T.; Strobl, J.; Takalo, L.O.; Tomov, T.; Tremosa Espasa, L.; Valdes, J.R.; Valero Pérez, J.; Verrecchia, F.; Webb, J.R.; Yoneda, M.; Zejmo, M.; Zheng, W.; Telting, J.; Saario, J.; Reynolds, T.; Kvammen, A.; Gafton, E.; Karjalainen, R.; Blay, P. A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign. Galaxies 2016, 4, 41. 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 Pérez, A.; Fallah Ramazani, V.; Filippenko, A.V.; Garcia, F.; Gómez Pinilla, F.; Gopinathan, M.; Haislip, J.B.;Harmanen, J.; Hudec, R.; Hurst, G.; Ivarsen, K.M.; Jelinek, M.; Joshi, A.; Kagitani, 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.; Reinthal, R.; Sadegi, S.; Sakanoi, T.; Sameer; Salto González, J.-L.; Schweyer, T.; Soldán Alfaro, F.C.; Karaman, N.; Sonbas, E.; Steele, I.; Stocke, J.T.; Strobl, J.; Takalo, L.O.; Tomov, T.; Tremosa Espasa, L.; Valdes, J.R.; Valero Pérez, J.; Verrecchia, F.; Webb, J.R.; Yoneda, M.; Zejmo, M.; Zheng, W.; Telting, J.; Saario, J.; Reynolds, T.; Kvammen, A.; Gafton, E.; Karjalainen, R.; Blay, P. A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign. Galaxies 2016, 4, 41.

Journal reference: Galaxies 2016, 4, 41
DOI: 10.3390/galaxies4040041

Abstract

We analyse the light curve in the R-band gathered during the 2015/16 observing season of OJ287. We did a search for QPOs using several methods in wide time domain. No statistically significant periods were found in the high frequency domain both in the ground data and also in K2 observations. In the longer periods domain the Lomb-Scargle periodogram revealed several peaks above the 99\% significance level. The longest one, about 95-day, corresponds to the ISCO period of the more massive SMBH. The 43-day period could be an alias or can be attributed to accretion in the form of two armed spiral wave.

Subject Areas

galaxies: active; BL Lacertae objects: individual (OJ 287); super massive black holes

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