Optical Monitoring of SS 433 in 2017-2021

Fig.2 - Radio monitoring of SS 433 in 2011–2021 with RATAN-600. There is a “quiescent” period before increased activity in 2018.

Cherepashchuk A. M., Dodin A. V., Postnov K. A., Belinski A. A., Burlak M. A., Ikonnikova N. P., Irsmambetova T. R., Trushkin S. A.

The observed characteristics of the spectral and photometric variability of SS 433 are discussed based on the data for 2018-2021 and compared with earlier results. The change in the orbital period that we discovered earlier according to V-photometry is confirmed by the data in the B-filter, although with less accuracy. In the observation interval from 1978 to 2021, secular changes are not observed either in the stationary or moving Hα lines. However, there are breaks in the precession phase up to ±11 days, which appear at time scales less than 1 year and disappear in 2-3 years. Original →