naa a22 4500 510731937 CHVBK 20180411082956.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1134/S1063772912050083 doi (NATIONALLICENCE)springer-10.1134/S1063772912050083 Results of long-term monitoring of 3C 273 over a wide range of wavelengths [Elektronische Daten] [A. Vol'vach, A. Kutkin, L. Vol'vach, M. Larionov, A. Lakhteenmaki, M. Tornikoski, E. Nieppola, J. Tammi, P. Savolainen, J. Leon-Tavares, M. Aller, H. Aller] The results of long-term monitoring of the quasar 3C 273 at wavelengths from radio to gamma rays between 1963 and 2011 are presented. The variations of the source flux density are studied using harmonic and wavelet analysis techniques. The values and frequency-time localizations of harmonic components in the flux-density variations are determined. The eight-year radio-variability period reported earlier had become gradually reduced and attenuated by 2000. The optical light curve has a component with a quasi-period of approximately 13 years. Cyclic variations whose periodicity gradually increased from approximately one to two years were observed in the X-ray between 1996 and 2006. The relative time delays between the light curves at different radio frequences are determined. The frequency dependence of time delays is approximated by the power law, ΔT(ν) ∝ ν −1/k with k = 1.4 ± 0.1, which can be used to infer the corresponding core shift and estimate the core-region magnetic field as B 1 pc = 0.5 ± 0.1 G. This approach is preferable to other methods, since it does not require multi-frequency VLBI observations and is a simple and effective tool for studying Active Galactic Nuclei. Pleiades Publishing, Ltd., 2013 Vol'vach A. Radio Astronomy Laboratory, Crimean Astrophysical Observatory, Ministry of Education and Science of Ukraine, pos. Katsiveli, Yalta, Ukraine aut Kutkin A. Astro Space Center, Lebedev Physical Instite, Russian Academy of Sciences, Moscow, Russia aut Vol'vach L. Radio Astronomy Laboratory, Crimean Astrophysical Observatory, Ministry of Education and Science of Ukraine, pos. Katsiveli, Yalta, Ukraine aut Larionov M. Astro Space Center, Lebedev Physical Instite, Russian Academy of Sciences, Moscow, Russia aut Lakhteenmaki A. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut Tornikoski M. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut Nieppola E. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut Tammi J. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut Savolainen P. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut Leon-Tavares J. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut Aller M. Department of Astronomy, University of Michigan, Ann Arbor, USA aut Aller H. Department of Astronomy, University of Michigan, Ann Arbor, USA aut Astronomy Reports SP MAIK Nauka/Interperiodica 57/1(2013-01-01), 34-45 1063-7729 57:1<34 2013 57 11444 https://doi.org/10.1134/S1063772912050083 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063772912050083 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vol'vach A. Radio Astronomy Laboratory, Crimean Astrophysical Observatory, Ministry of Education and Science of Ukraine, pos. Katsiveli, Yalta, Ukraine aut NATIONALLICENCE 700 1- Kutkin A. Astro Space Center, Lebedev Physical Instite, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Vol'vach L. Radio Astronomy Laboratory, Crimean Astrophysical Observatory, Ministry of Education and Science of Ukraine, pos. Katsiveli, Yalta, Ukraine aut NATIONALLICENCE 700 1- Larionov M. Astro Space Center, Lebedev Physical Instite, Russian Academy of Sciences, Moscow, Russia aut NATIONALLICENCE 700 1- Lakhteenmaki A. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut NATIONALLICENCE 700 1- Tornikoski M. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut NATIONALLICENCE 700 1- Nieppola E. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut NATIONALLICENCE 700 1- Tammi J. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut NATIONALLICENCE 700 1- Savolainen P. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut NATIONALLICENCE 700 1- Leon-Tavares J. Metsähovi Radio Observatory, Aalto University, Helsinki, Finland aut NATIONALLICENCE 700 1- Aller M. Department of Astronomy, University of Michigan, Ann Arbor, USA aut NATIONALLICENCE 700 1- Aller H. Department of Astronomy, University of Michigan, Ann Arbor, USA aut NATIONALLICENCE 773 0- Astronomy Reports SP MAIK Nauka/Interperiodica 57/1(2013-01-01), 34-45 1063-7729 57:1<34 2013 57 11444 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer