Optical and Radio Variability of the Blazar S4 0954+658
Abstract
We present an optical-to-radio study of the BL Lac object S4 0954+658 observations during 1998–2023. The measurements were obtained with the SAO RAS Zeiss-1000 and AS-500/2 0.5-m telescopes in 2003–2023, with the RATAN-600 radio telescope at 1.25 (0.96, 1.1), 2.3, 4.7 (3.7, 3.9), 8.2 (7.7), 11.2, 22.3 (21.7) GHz in 1998–2023, with the IAA RAS RT-32 Zelenchukskaya and Badary telescopes at 5.05 and 8.63 GHz in 2020–2023, and with the RT-22 single-dish telescope of CrAO RAS at 36.8 GHz in 2009–2023. In this period the blazar was showing extremely high broadband activity with the variability amplitude of the flux densities up to 70–100
- Publication:
-
Astrophysical Bulletin
- Pub Date:
- December 2023
- DOI:
- 10.1134/S1990341323600229
- arXiv:
- arXiv:2401.03992
- Bibcode:
- 2023AstBu..78..464V
- Keywords:
-
- galaxies: active—galaxies: BL Lacertae objects—quasars: general—radio continuum: galaxies;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- Published in Astrophysical Bulletin Vol.78, N4 (2023)