MWC 560 remains in high state
ATel #15906; D. Marchev, G. Yordanova, N. Pavlova (Shumen University), V. Marchev, R. Zamanov (Bulgarian Academy of Sciences)
on 16 Feb 2023; 11:36 UT
Credential Certification: R. K. Zamanov (rkz@astro.bas.bg)
Subjects: Binary, Cataclysmic Variable, Variables
Referred to by ATel #: 16956
MWC 560 is a symbiotic star which used to show consistent flickering until 2018 (e.g. Lucy et al. 2020, MNRAS 492, 3107). Since then no such flickering is observable and the system is in a high state. Our latest observations were conducted on 2022 November 10 and 2023 February 13 with the 40-cm MEADE telescope at the Shumen University "Episkop K. Preslavski", Bulgaria (Kjurkchieva et al. 2020, BlgAJ, 32, 113). Each observation took 3 hours and no flickering was detected during that time. The calculated mean values of the brightness are r'=8.247+/-0.01, g'=8.747+/-0.006 for the first night and r'=8.27+/-0.006, g'=8.743+/-0.007 (Fig.1) for the second one. The observations show that MWC 560 remains in high state and no flickering is visible, similar to the previous observational season (Marchev et al., 2022, AcSN, 9, 1).
This work is partially supported by the Scientific Research Fund of the Shumen University 2023.
Fig. 1 Fig.1 Two color observations of MWC560 from 2023 Feb. 13.
