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3 results on '"J. Lozano de Haro"'

1. A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign

Author

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, and P. Blay

Subjects
galaxies: active, BL Lacertae objects: individual (OJ287), supermassive black holes, Astronomy, QB1-991
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.

Published
2016
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2. A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign

Author

T. M. Reynolds, J. H. Telting, Andrzej S. Baran, Daniel E. Reichart, Navpreet Kaur, Eda Sonbas, Stefano Ciprini, J. Lozano de Haro, T. Schweyer, Takeshi Sakanoi, WeiKang Zheng, Gary Poyner, Kiran S. Baliyan, Daniel B. Caton, Katsura Matsumoto, A. Escartin Pérez, A. W. Neely, J. Dalessio, Kozo Sadakane, Waldemar Ogloza, T. Pursimo, Jussi Harmanen, F. Garcia, V. H. Chavushyan, Byeong-Cheol Lee, Markus Mugrauer, B. Debski, S. Okano, Pauli Pihajoki, Kari Nilsson, Andrei Berdyugin, Andreas Kvammen, R. Naves Nogues, K. M. Ivarsen, H. Er, F. Alicavus, L. Tremosa Espasa, J. P. Moore, J. B. Haislip, Masato Kagitani, Elina Lindfors, L. O. Takalo, G. Hurst, R. Reinthal, V. Fallah Ramazani, Toma Tomov, Marek Drozdz, Kosmas Gazeas, Mauri Valtonen, Michal Siwak, John T. Stocke, J.-L. Salto González, William C. Keel, F. Campos, Arti Joshi, Pere Blay, J. Carrillo Gómez, J. R. Valdes, J. Valero Pérez, Iain A. Steele, Maheswar Gopinathan, M. Zejmo, Alexei V. Filippenko, M. R. Kidger, Gopal Bhatta, Dinko Dimitrov, Jan Strobl, Arti Goyal, Helen Jermak, Mizuki Yoneda, E. Gafton, F. Verrecchia, Stanisław Zoła, Judith L. Provencal, R. H. Nelson, M. Campas Torrent, J. Saario, Aaron P. LaCluyze, Vilppu Piirola, J. Krzesinski, James R. Webb, Ahmet Erdem, David Boyd, N. Karaman, F. Gómez Pinilla, Jeewan C. Pandey, A. Raj, Martin Jelínek, Achamveedu Gopakumar, René Hudec, F. C. Soldán Alfaro, S. Sadegi, M. Perri, R. Karjalainen, Sameer, and Department of Physics

Subjects
Physics, Supermassive black hole, ta115, 010504 meteorology & atmospheric sciences, Accretion (meteorology), lcsh:Astronomy, galaxies: active, supermassive black holes, Astronomy, Astronomy and Astrophysics, Astrophysics, Light curve, 115 Astronomy, Space science, 01 natural sciences, BL Lacertae objects: individual (OJ287), Black hole, lcsh:QB1-991, Innermost stable circular orbit, Spiral wave, 0103 physical sciences, Periodogram, Blazar, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences
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.

Published
2016

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

Author

K. M. Ivarsen, Jussi Harmanen, John T. Stocke, Pere Blay, Pauli Pihajoki, Byeong-Cheol Lee, Dinko Dimitrov, F. Alicavus, J.-L. Salto Gonzales, F. Garcia, Arti Goyal, Waldemar Ogloza, Judith L. Provencal, J. H. Telting, Eda Sonbas, J. Carrillo Gómez, Elina Lindfors, Stefano Ciprini, Vilppu Piirola, Helen Jermak, J. Lozano de Haro, F. C. Soldán Alfaro, Andrei Berdyugin, T. Pursimo, R. Naves Nogues, Ahmet Erdem, Staszek Zola, R. Reinthal, S. Okano, Kiran S. Baliyan, B. Debski, J. R. Valdes, T. M. Reynolds, Gopal Bhatta, Takeshi Sakanoi, Michal Siwak, M. Campas Torrent, Andrzej S. Baran, Daniel E. Reichart, R. H. Nelson, V. Fallah Ramazani, A. Escartin Pérez, Mizuki Yoneda, J. Saario, E. Gafton, J. Valero Pérez, F. Campos, Kari Nilsson, L. Tremosa Espasa, Tassilo Schweyer, Maheswar Gopinathan, James R. Webb, Jan Strobl, Arti Joshi, G. Hurst, Toma Tomov, J. Dalessio, Kozo Sadakane, Daniel B. Caton, A. W. Neely, L. O. Takalo, J. Krzesinski, William C. Keel, V. H. Chavushyan, Mauri Valtonen, WeiKang Zheng, Gary Poyner, Katsura Matsumoto, Andreas Kvammen, M. Zejmo, Alexei V. Filippenko, Masato Kagitani, M. R. Kidger, Navpreet Kaur, J. P. Moore, Kosmas Gazeas, Marek Drozdz, Aaron P. LaCluyze, Iain A. Steele, F. Verrecchia, J. B. Haislip, David Boyd, N. Karaman, F. Gómez Pinilla, Jeewan C. Pandey, A. Raj, Martin Jelínek, Achamveedu Gopakumar, S. Sadegi, Sameer, M. Perri, and R. Karjalainen

Subjects
Physics, Supermassive black hole, Accretion (meteorology), Alias, 010308 nuclear & particles physics, Astronomy, Astrophysics, Light curve, 01 natural sciences, astronomy_astrophysics, Frequency domain, 0103 physical sciences, Time domain, Blazar, 010303 astronomy & astrophysics, BL Lac object
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.

Published
2016

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