pronounced at phase $0.923$ ($-0.077$), when the calculated column density for $\omega=270^\circ$ is too low to explain the observed value, and the minimum has not started yet.

THE COLLAPSE OF THE WIND COLLISION REGION ONTO THE SECONDARY STAR {#sec:collapse}
=================================================================

P09 discussed the possibility that the WCR collapses onto the secondary. In their discussion they mentioned that if the collapse occurs, then the secondary wind is continued to be blown on the other side of the secondary. They do not consider accretion. We now show that the regular secondary wind cannot be blown during the event, not even half of it, and that if the WCR collapse occurs, then accretion in inevitable.

The residual wind {#sec:residual}
-----------------

P09 assumed that during X-ray minimum about half of the secondary wind is continued to be blown at $\sim 3000 \km \s^{-1}$ from the side of the secondary not facing the primary. They then took the X-ray to come from regions away from the secondary, as if the colliding wind regions was unaffected. We show that this cannot be the case.

Let the wind blown posses a fraction $\zeta$ of the regular wind, such that the mass loss rate is $\dot M_{2m} = 