Galaxies (Oct 2016)
A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign
- S. Zola,
- M. Valtonen,
- G. Bhatta,
- A. Goyal,
- B. Debski,
- A. Baran,
- J. Krzesinski,
- M. Siwak,
- S. Ciprini,
- A. Gopakumar,
- H. Jermak,
- K. Nilsson,
- D. Reichart,
- K. Matsumoto,
- K. Sadakane,
- K. Gazeas,
- M. Kidger,
- V. Piirola,
- F. Alicavus,
- K. S. Baliyan,
- A. Berdyugin,
- D. Boyd,
- M. Campas Torrent,
- F. Campos,
- J. Carrillo Gómez,
- D. B. Caton,
- V. Chavushyan,
- J. Dalessio,
- D. Dimitrov,
- M. Drozdz,
- H. Er,
- A. Erdem,
- A. Escartin Pérez,
- V. Fallah Ramazani,
- A. V. Filippenko,
- F. Garcia,
- F. Gómez Pinilla,
- M. Gopinathan,
- J. B. Haislip,
- J. Harmanen,
- R. Hudec,
- G. Hurst,
- K. M. Ivarsen,
- M. Jelinek,
- A. Joshi,
- M. Kagitani,
- N. Kaur,
- W. C. Keel,
- A. P. LaCluyze,
- B. C. Lee,
- E. Lindfors,
- J. Lozano de Haro,
- J. P. Moore,
- M. Mugrauer,
- R. Naves Nogues,
- A. W. Neely,
- R. H. Nelson,
- W. Ogloza,
- S. Okano,
- J. C. Pandey,
- M. Perri,
- P. Pihajoki,
- G. Poyner,
- J. Provencal,
- T. Pursimo,
- A. Raj,
- R. Reinthal,
- S. Sadegi,
- T. Sakanoi,
- Sameer,
- J.-L. Salto González,
- T. Schweyer,
- F. C. Soldán Alfaro,
- N. Karaman,
- E. Sonbas,
- I. Steele,
- J. T. Stocke,
- J. Strobl,
- L. O. Takalo,
- T. Tomov,
- L. Tremosa Espasa,
- J. R. Valdes,
- J. Valero Pérez,
- F. Verrecchia,
- J. R. Webb,
- M. Yoneda,
- M. Zejmo,
- W. Zheng,
- J. Telting,
- J. Saario,
- T. Reynolds,
- A. Kvammen,
- E. Gafton,
- R. Karjalainen,
- P. Blay
Affiliations
- S. Zola
- Astronomical Observatory, Jagiellonian University, ul. Orla 171, Krakow 30-244, Poland
- M. Valtonen
- Finnish Centre for Astronomy with ESO, University of Turku, Turku F-21500, Finland
- G. Bhatta
- Astronomical Observatory, Jagiellonian University, ul. Orla 171, Krakow 30-244, Poland
- A. Goyal
- Astronomical Observatory, Jagiellonian University, ul. Orla 171, Krakow 30-244, Poland
- B. Debski
- Astronomical Observatory, Jagiellonian University, ul. Orla 171, Krakow 30-244, Poland
- A. Baran
- Mt. Suhora Observatory, Pedagogical University, ul. Podchorazych 2, Krakow 30-084, Poland
- J. Krzesinski
- Mt. Suhora Observatory, Pedagogical University, ul. Podchorazych 2, Krakow 30-084, Poland
- M. Siwak
- Mt. Suhora Observatory, Pedagogical University, ul. Podchorazych 2, Krakow 30-084, Poland
- S. Ciprini
- Agenzia Spaziale Italiana (ASI) Science Data Center, Roma I-00133, Italy
- A. Gopakumar
- Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai 400005, India
- H. Jermak
- Astrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park, Brownlow Hill L3 5RF, UK
- K. Nilsson
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku F-21500, Finland
- D. Reichart
- Departmentof Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA
- K. Matsumoto
- Astronomical Institute, Osaka Kyoiku University, 4-698 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
- K. Sadakane
- Astronomical Institute, Osaka Kyoiku University, 4-698 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
- K. Gazeas
- Department of Astrophysics, Astronomy and Mechanics, National & Kapodistrian University of Athens, Zografos GR-15784, Athens, Greece
- M. Kidger
- Herschel Science Centre, ESAC, European Space Agency, C/Bajo el Castillo, s/n, Villanueva de la Cañada, Madrid E-28692, Spain
- V. Piirola
- Finnish Centre for Astronomy with ESO, University of Turku, Turku F-21500, Finland
- F. Alicavus
- Department of Physics, Faculty of Arts and Sciences, Canakkale Onsekiz Mart University, Canakkale TR-17100, Turkey
- K. S. Baliyan
- Physical Research Laboratory, Ahmedabad 380009, India
- A. Berdyugin
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku F-21500, Finland
- D. Boyd
- 5, Silver Lane, West Challow, Wantage, Oxon OX12 9TX, UK
- M. Campas Torrent
- C/Jaume Balmes No 24, Cabrils, Barcelona E-08348, Spain
- F. Campos
- C/.Riera, 1, 1<sup><i>o</i></sup> 3<sup><i>a</i></sup> B, Vallirana, Barcelona E-08759, Spain
- J. Carrillo Gómez
- Carretera de Martos 28 primero Fuensanta, Jaen E-23001, Spain
- D. B. Caton
- Dark Sky Observatory, Department of Physics and Astronomy, Appalachian State University, Boone, NC 28608, USA
- V. Chavushyan
- Instituto Nacional de Astrofisica, Óptica y Electrónica, Apartado Postal 51-216, Puebla 72000, Mexico
- J. Dalessio
- Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
- D. Dimitrov
- Institute of Astronomy and NAO, Bulgarian Academy of Science, 72 Tsarigradsko Chaussee Blvd., Sofia 1784, Bulgaria
- M. Drozdz
- Mt. Suhora Observatory, Pedagogical University, ul. Podchorazych 2, Krakow 30-084, Poland
- H. Er
- Department of Physics, Faculty of Science, Atatürk University, Erzurum 25240, Turkey
- A. Erdem
- Department of Physics, Faculty of Arts and Sciences, Canakkale Onsekiz Mart University, Canakkale TR-17100, Turkey
- A. Escartin Pérez
- Aritz Bidea No 8 4 B, Mungia, Bizkaia E-48100, Spain
- V. Fallah Ramazani
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku F-21500, Finland
- A. V. Filippenko
- Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
- F. Garcia
- Muñas de Arriba La Vara, Valdés E-33780, Spain
- F. Gómez Pinilla
- C/Concejo de Teverga 9, 1 C, Madrid E-28053, Spain
- M. Gopinathan
- Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital 263002, India
- J. B. Haislip
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA
- J. Harmanen
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku F-21500, Finland
- R. Hudec
- Astronomical Institute, The Czech Academy of Sciences, Ondřejov 25165, Czech Republic
- G. Hurst
- 16 Westminster Close, Basingstoke, Hampshire RG22 4PP, UK
- K. M. Ivarsen
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA
- M. Jelinek
- Astronomical Institute, The Czech Academy of Sciences, Ondřejov 25165, Czech Republic
- A. Joshi
- Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital 263002, India
- M. Kagitani
- Planetary Plasma and Atmospheric Research Center, Tohoku University, Sendai 980-8578, Japan
- N. Kaur
- Physical Research Laboratory, Ahmedabad 380009, India
- W. C. Keel
- Department of Physics and Astronomy and SARA Observatory, University of Alabama, Box 870324, Tuscaloosa, AL 35487, USA
- A. P. LaCluyze
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA
- B. C. Lee
- Korea Astronomy and Space Science Institute, 776, Daedeokdae-Ro, Youseong-Gu, Daejeon 305-348, Korea
- E. Lindfors
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku F-21500, Finland
- J. Lozano de Haro
- Partida de Maitino, Pol. 2 Num. 163, Elche E-03206, Spain
- J. P. Moore
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599, USA
- M. Mugrauer
- Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergäßchen 2-3, Jena D-07745, Germany
- R. Naves Nogues
- C/Jaume Balmes No 24, Cabrils, Barcelona E-08348, Spain
- A. W. Neely
- NF/Observatory, Silver City, NM 88041, USA
- R. H. Nelson
- 1393 Garvin Street, Prince George, BC V2M 3Z1, Canada
- W. Ogloza
- Mt. Suhora Observatory, Pedagogical University, ul. Podchorazych 2, Krakow 30-084, Poland
- S. Okano
- Planetary Plasma and Atmospheric Research Center, Tohoku University, Sendai 980-8578, Japan
- J. C. Pandey
- Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital 263002, India
- M. Perri
- Agenzia Spaziale Italiana (ASI) Science Data Center, Roma I-00133, Italy
- P. Pihajoki
- Department of Physics, University of Helsinki, P.O. Box 64, Helsinki FI-00014, Finland
- G. Poyner
- BAA Variable Star Section, 67 Ellerton Road, Kingstanding, Birmingham B44 0QE, UK
- J. Provencal
- Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
- T. Pursimo
- Nordic Optical Telescope, Apartado 474, Santa Cruz de La Palma E-38700, Spain
- A. Raj
- Indian Institute of Astrophysics, II Block Koramangala, Bangalore 560 034, India
- R. Reinthal
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku F-21500, Finland
- S. Sadegi
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku F-21500, Finland
- T. Sakanoi
- Planetary Plasma and Atmospheric Research Center, Tohoku University, Sendai 980-8578, Japan
- Sameer
- Physical Research Laboratory, Ahmedabad 380009, India
- J.-L. Salto González
- Observatori Cal Maciarol Módul 8. Masia Cal Maciarol, Camí de l’Observatori s/n, Ager, Lerida E-25691, Spain
- T. Schweyer
- Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, Garching D-85748, Germany
- F. C. Soldán Alfaro
- C/Petrarca 6 1<sup><i>a</i></sup> Sevilla E-41006, Spain
- N. Karaman
- Department of Physics, University of Adiyaman, Adiyaman 02040, Turkey
- E. Sonbas
- Department of Physics, University of Adiyaman, Adiyaman 02040, Turkey
- I. Steele
- Astrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park, Brownlow Hill L3 5RF, UK
- J. T. Stocke
- Department of Astrophysical and Planetary Sciences, Center for Astrophysics and Space Astronomy, University of Colorado, Box 389, Boulder, CO 80309, USA
- J. Strobl
- Astronomical Institute, The Czech Academy of Sciences, Ondřejov 25165, Czech Republic
- L. O. Takalo
- Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Turku F-21500, Finland
- T. Tomov
- Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, ul. Grudziadzka 5, Torun 87-100, Poland
- L. Tremosa Espasa
- C/Cardenal Vidal i Barraquee No 3, Cambrils, Tarragona E-43850, Spain
- J. R. Valdes
- Instituto Nacional de Astrofisica, Óptica y Electrónica, Apartado Postal 51-216, Puebla 72000, Mexico
- J. Valero Pérez
- C/Matarrasa 16, Ponferrada, León E-24411, Spain
- F. Verrecchia
- Agenzia Spaziale Italiana (ASI) Science Data Center, Roma I-00133, Italy
- J. R. Webb
- Florida International University and SARA Observatory, University Park Campus, Miami, FL 33199, USA
- M. Yoneda
- Kiepenheuer-Institut fur Sonnenphysik, Freiburg D-79104, Germany
- M. Zejmo
- Janusz Gil Institute of Astronomy, University of Zielona Góra, Szafrana 2, Zielona Góra PL-65-516, Poland
- W. Zheng
- Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
- J. Telting
- Nordic Optical Telescope, Apartado 474, Santa Cruz de La Palma E-38700, Spain
- J. Saario
- Nordic Optical Telescope, Apartado 474, Santa Cruz de La Palma E-38700, Spain
- T. Reynolds
- Nordic Optical Telescope, Apartado 474, Santa Cruz de La Palma E-38700, Spain
- A. Kvammen
- Nordic Optical Telescope, Apartado 474, Santa Cruz de La Palma E-38700, Spain
- E. Gafton
- Nordic Optical Telescope, Apartado 474, Santa Cruz de La Palma E-38700, Spain
- R. Karjalainen
- Isaac Newton Group of Telescopes, Apartado 321, Santa Cruz de La Palma E-38700, Spain
- P. Blay
- IAC-NOT, C/Via Lactea, S/N, La Laguna E-38205, Spain
- DOI
- https://doi.org/10.3390/galaxies4040041
- Journal volume & issue
-
Vol. 4,
no. 4
p. 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.
Keywords
