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Stochastic modeling of multiwavelength variability of the classical BL Lac Object OJ 287 on timescales ranging from decades to hours

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dc.contributor.author Goyal, A
dc.contributor.author Stawarz, L
dc.contributor.author Zola, S
dc.contributor.author Marchenko, V
dc.contributor.author Soida, M
dc.contributor.author Nilsson, K
dc.contributor.author Ciprini, S
dc.contributor.author Baran, A
dc.contributor.author Ostrowski, M
dc.contributor.author Wiita, P. J
dc.contributor.author Gopal-Krishna
dc.contributor.author iemiginowska, A
dc.contributor.author Sobolewska, M
dc.contributor.author Jorstad, S
dc.contributor.author Marscher, A
dc.contributor.author Aller, M. F
dc.contributor.author Aller, H. D
dc.contributor.author Hovatta, T
dc.contributor.author Caton, D. B
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 Jermak, H
dc.contributor.author Alicavus, F
dc.contributor.author Baliyan, K. S
dc.contributor.author Baransky, A
dc.contributor.author Berdyugin, A
dc.contributor.author Blay, P
dc.contributor.author Boumis, P
dc.contributor.author Boyd, D
dc.contributor.author Bufan, Y
dc.contributor.author Campas Torrent, M
dc.contributor.author Campos, F
dc.contributor.author Carrillo Gomez, J
dc.contributor.author Dalessio, J
dc.contributor.author Debski, B
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 Gafton, E
dc.contributor.author Garcia, F
dc.contributor.author Godunova, V
dc.contributor.author Gomez Pinilla, F
dc.contributor.author Maheswar, G
dc.contributor.author Haislip, J. B
dc.contributor.author Haque, S
dc.contributor.author Harmanen, J
dc.contributor.author Hudec, R
dc.contributor.author Hurst, G
dc.contributor.author Ivarsen, K. M
dc.contributor.author Joshi, A
dc.contributor.author Kagitani, M
dc.contributor.author Karaman, N
dc.contributor.author Karjalainen, R
dc.contributor.author Kaur, N
dc.contributor.author Koziel-Wierzbowska, D
dc.contributor.author Kuligowska, E
dc.contributor.author Kundera, T
dc.contributor.author Kurowski, S
dc.contributor.author Kvammen, A
dc.contributor.author LaCluyze, A. P
dc.contributor.author Lee, B. C
dc.contributor.author Liakos, A
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 Ogloza, W
dc.contributor.author Okano, S
dc.contributor.author Pajdosz, U
dc.contributor.author Pandey, J. C
dc.contributor.author Perri, M
dc.contributor.author Poyner, G
dc.contributor.author Provencal, J
dc.contributor.author Pursimo, T
dc.contributor.author Raj, A
dc.contributor.author and 29 co-authors
dc.date.accessioned 2020-11-19T13:36:29Z
dc.date.available 2020-11-19T13:36:29Z
dc.date.issued 2018-08-20
dc.identifier.citation The Astrophysical Journal, Vol. 863, No. 2, 175 en_US
dc.identifier.issn 0004-637X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7240
dc.description Restricted Access © The American Astronomical Society https://doi.org/10.3847/1538-4357/aad2de en_US
dc.description.abstract We present the results of our power spectral density analysis for the BL Lac object OJ 287, utilizing the Fermi-LAT survey at high-energy γ-rays, Swift-XRT in X-rays, several ground-based telescopes and the Kepler satellite in the optical, and radio telescopes at GHz frequencies. The light curves are modeled in terms of continuous-time autoregressive moving average (CARMA) processes. Owing to the inclusion of the Kepler data, we were able to construct for the first time the optical variability power spectrum of a blazar without any gaps across ~6 dex in temporal frequencies. Our analysis reveals that the radio power spectra are of a colored-noise type on timescales ranging from tens of years down to months, with no evidence for breaks or other spectral features. The overall optical power spectrum is also consistent with a colored noise on the variability timescales ranging from 117 years down to hours, with no hints of any quasi-periodic oscillations. The X-ray power spectrum resembles the radio and optical power spectra on the analogous timescales ranging from tens of years down to months. Finally, the γ-ray power spectrum is noticeably different from the radio, optical, and X-ray power spectra of the source: we have detected a characteristic relaxation timescale in the Fermi-LAT data, corresponding to ~150 days, such that on timescales longer than this, the power spectrum is consistent with uncorrelated (white) noise, while on shorter variability timescales there is correlated (colored) noise. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject acceleration of particles en_US
dc.subject BL Lacertae objects: individual (OJ 287) en_US
dc.subject galaxies: active en_US
dc.subject magnetic fields en_US
dc.subject radiation mechanisms: non-thermal en_US
dc.title Stochastic modeling of multiwavelength variability of the classical BL Lac Object OJ 287 on timescales ranging from decades to hours en_US
dc.type Article en_US


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