**Table 1:** Astrophysical parameters for PV Cas (solar, K units).
	Primary	Secondary
Mass	$2.81 \pm 0.05$	$2.76 \pm 0.05$
Radius	$2.297 \pm 0.021$	$2.256 \pm 0.016$
$\log~ T_{\rm eff}$	4.009	4.008
Observed rotational velocity	65 km s^-1 (both components)
TR	$0.989 \pm 0.002$
log $\overline {k_{2 {\rm obs}}}$	- $2.452 \pm 0.023$

Popper (1987), Barembaum & Etzel (1995), Svaricek et al. (2008).