Sorry for double posting, it looks like I only have limited time available to edit my previous post. The 6-h period disappeared with today’s data, so it was spurious and likely me not understanding how to use FALC. I now realize it requires manual manipulation with light curve segments to bring them down to the same magnitude level, so I dropped this idea. With today’s data, I have fitted a high-degree polynomial to “detrend” data assuming eclipses also occur in the outburst state, and many algorithms converge on a 4.52-h period appearing in the residuals. Although, still, more observations are obviously needed. I also wonder if I should search eclipses in the quiescent data only.