The symbiotic star MWC 560 - optical flickering still missing
ATel #14239; R. Zamanov (Institute of Astronomy and NAO), D. Marchev (Shumen University), V. Marchev, B. Spassov, K. Stoyanov (Institute of Astronomy and NAO, Bulgaria)
on 2 Dec 2020; 12:32 UT
Credential Certification: Kiril Stoyanov (kstoyanov@astro.bas.bg)
Subjects: Optical, Cataclysmic Variable, Star
MWC 560 (V694 Mon) is a jet-ejecting symbiotic star (e.g. Lucy et al. 2020, MNRAS 492, 3107).
We performed CCD photometry of MWC 560 with the 40 cm telescope of the Shumen University "Episkop K. Preslavski" (Bulgaria). On 2020 November 28, for a 3.5 hours long observation run, we obtained 263 points in Sloan-g' and r' bands. During our run, no variability with amplitude larger than 0.04 mag is visible. The mean magnitudes are g'= 8.869 ± 0.006 and r'= 8.490 ± 0.007.
On Fig.1 is plotted the light curve obtained on 2020 November 28 together with observations from 2015 when flickering with amplitude 0.4 mag is visible.
The optical flickering of MWC 560 was always present between 1984 and 2018. It disappeared in October 2018 (ATel #12227). Our observations indicate that the optical flickering is still missing.
Acknowledgment: grants KP-6-H28/2, RD-08-122/2020.
Figure 1. Flickering is missing on 2020 November 28
