Mass-outflow from the active symbiotic binary BF Cyg during its 2015 and 2017 bursts

In this contribution we present observations of the symbiotic star BF Cygni during its current active phase. Our photometric monitoring indicated 1-mag bursts during 2015 and 2017 on the time-scale of weeks with gradual fading to the pre-outburst level for more than 1 year. During these events, our spectra show signatures of a variable mass-outflow and formation of a highly-collimated bipolar mass ejection.