aat Acta Astrophys. Tau. Acta Astrophysica Taurica 2712-925X Kiselev Nikolai Nikolaevich, Mosсow, settlement Moskovskii, Tat'yanin Park Str., 12, Moscow, Russia. RU 66 10.34898/aat.vol4.iss4.pp5-8 Modern Instruments and Methods in Astronomy Conference Proceedings Long-term radio variability properties of an extensive sample of bright blazars Mufakharov Timur Sotnikova Yulia Iuzhanina Kseniia Special Astrophysical Observatory of the Russian Academy of Sciences, Nizhnij Arkhyz 369167, Russia; Kazan Federal University, Kazan 420008, Russia Special Astrophysical Observatory of the Russian Academy of Sciences, Nizhnij Arkhyz 369167, Russia Kazan Federal University, Kazan 420008, Russia 25 12 2023 4 4 5 8 09 11 2023 Copyright (c) 2023 Timur Mufakharov, Yulia Sotnikova , Kseniia Iuzhanina 2023 Timur Mufakharov, Yulia Sotnikova , Kseniia Iuzhanina The metadata for this submission is licensed under a Creative Commons Attribution 4.0 International License. Copyright and publishing rights for texts published in Acta Astrophysica Taurica is retained by the authors, with first publication rights granted to the journal.Texts are free to use with proper attribution and link to the licensing (Creative Commons Attribution 4.0 International).

The RATAN-600 multi-frequency catalog of blazars (BLcat), which combines radio data for more than 1800 blazars selected from the Roma-BZCAT catalog, is available in the interactive form on the SAO RAS home page. The blazars were observed with the RATAN-600 telescope in 2005–2023 quasi-simultaneously at four to six frequencies in the range 1.2–22.3 GHz. We present the radio variability properties of different subclasses of blazars presented in BLcat based on the RATAN-600 long-term measurements. Our results support previous studies of blazar radio variability showing that the variability index tends to increase with frequency and that the BL Lacs subclass is more variable than others. We show an impact of the monitoring cadence on the variability estimates. The use of time series with longer monitoring periods, more regular observations, and more data points is crucial to detect blazar activity and obtain its characteristics.

active galactic nuclei blazars radio continuum catalogs The ob- servations were supported by the Ministry of Science and Higher Education of the Russian Federation. Aller H.D., Aller M.F., Hughes P.A., 1985. Astrophys. J., vol. 298, pp. 296–300. Aller M.F., Aller H.D., Hughes P.A., 1992. Astrophys. J., vol. 399, p. 16. Aller M.F., Aller H.D., Hughes P.A., Latimer G.E., 1999. Astrophys. J., vol. 512, pp. 601–622. Ciaramella A., Bongardo C., Aller H.D., et al., 2004. Astron. Astrophys., vol. 419, pp. 485–500. Healey S.E., Romani R.W., Taylor G.B., et al., 2007. Astrophys. J., Suppl. Ser. , vol. 171, no. 1, pp. 61–71. Itoh R., Utsumi Y., Inoue Y., et al., 2020. Astrophys. J., vol. 901, no. 1, 3. Korolkov D.V., Pariiskii I.N., 1979. Sky and Telescope, vol. 57, pp. 324–329. Kovalev Y.Y., Kovalev Y.A., Nizhelsky N.A., Bogdantsov A.B., 2002. Publications of the Astronomical Society of Australia, vol. 19, pp. 83–87. Marscher A.P., Gear W.K., 1985. Astrophys. J., vol. 298, pp. 114–127. Massaro E., Maselli A., Leto C., et al., 2015. Astrophys. Space Sci., vol. 357, 75. Mingaliev M.G., Sotnikova Y.V., Udovitskiy R.Y., et al., 2014. Astron. Astrophys., vol. 572, A59. Nesterov N.S., Volvach A.E., Strepka I.D., 2000. Astronomy Letters, vol. 26, pp. 204–207. Nieppola E., Hovatta T., Tornikoski M., et al., 2009. Astron. J., vol. 137, no. 6, pp. 5022–5036. Richards J.L., Max-Moerbeck W., Pavlidou V., et al., 2011. Astrophys. J., Suppl. Ser. , vol. 194, 29. Sotnikova Y.V., 2020. In I.I. Romanyuk, I.A. Yakunin, A.F. Valeev, D.O. Kudryavtsev (Eds.), GroundBased Astronomy in Russia. 21st Century. pp. 32–40. doi:10.26119/978-5-6045062-0-2_2020_32. Sotnikova Y.V., Mufakharov T.V., Mingaliev M.G., et al., 2022. Astrophysical Bulletin, vol. 77, no. 4, pp. 361–371. Terasranta H., Wiren S., Koivisto P., Saarinen V., Hovatta T., 2005. Astron. Astrophys., vol. 440, pp. 409–410. Tornikoski M., Lainela M., Valtaoja E., 2000. Astron. J., vol. 120, pp. 2278–2283. van der Laan H., 1966. Nature, vol. 211, no. 5054, pp. 1131–1133. Verkhodanov O.V., Trushkin S.A., Chernenkov V.N., 1997. Baltic Astronomy, vol. 6, pp. 275–278. Verkhodanov O.V., Trushkin S.A., Andernach H., Chernenkov V.N., 2005. Bulletin of the Special Astrophysics Observatory, vol. 58, pp. 118–129. Volvach A.E., Pushkarev A.B., Volvach L.N., Aller H.D., Aller M.F., 2009. Kosmcna nauka i tehnologia, vol. 15, no. 4, pp. 33–57. Volvach A.E., Volvach L.N., Bychkova V.S., et al., 2012. Astronomy Reports, vol. 56, no. 4, pp. 275–280. Vol’vach A.E., Kutkin A.M., Larionov M.G., et al., 2014. Astronomy Reports, vol. 58, no. 2, pp. 71–77. Volvach A.E., Kardashev N.S., Larionov M.G., Volvach L.N., 2016a. Astronomy Reports, vol. 60, no. 7, pp. 621–629. Volvach A.E., Kardashev N.S., Larionov M.G., Volvach L.N., 2016b. Astronomy Reports, vol. 60, no. 9, pp. 781–791.