EVENTS LEADING UP TO THE 2015 JUNE OUTBURST OF V404 CYG
EVENTS LEADING UP TO THE 2015 JUNE OUTBURST OF V404 CYG
On 2015 June 15 the burst alert telescope (BAT) on board {\em Swift} detected an X-ray outburst from the black hole transient V404 Cyg. We monitored V404 Cyg for the last 10 years with the 2-m Faulkes Telescope North in three optical bands (V, R, and i$^{'}$). We found that, …