Parameter estimation bias from overlapping binary black hole events in second generation interferometers

Since the initial detection of gravitational waves in 2015, over 50 candidate events have been reported by LIGO-Virgo-KAGRA collaboration. As current generation detectors move toward their design sensitivity, rate these detections will increase. The next are likely to high enough sensitivities that multiple merging binaries be visible at same time. In this paper we show is happen before end decade, during observations LIGO-Voyager detector. We investigate situation overlapping binary black hole (BBH) mergers detectors. find parameter estimation techniques capable distinguishing louder two BBH events, without significant bias, when merger times not less than $\ensuremath{\sim}0.1$ seconds apart or ratio signal-to-noise ratios systems uneven. This region space dependent upon sky locations signals and relation those light travel time between also that, if highly overlapping, then recovered set parameters often strong evidence precession. Finally, bias can occur even signal causing below threshold.