on the amplitude ratio $A_{\rm RV}/A_{H}$, rather than by fitting the black circles in Figure \[fig:phase\_cor\]. Nevertheless, the predicted velocity curves adequately accommodate the measured velocities, particularly for [GCC-a]{} and -c. The estimated mean velocities are listed in Table \[tab:vel\] and indicated by horizontal lines in Figure \[fig:phase\_cor\].

![ Velocities at individual epochs indicated by filled circles are compared with the velocity curve templates. Panels (a), (b), (c), and (d) show the data for our targets [GCC-a]{}, -b, -c, and -d, respectively. Thick curves have the amplitudes obtained based on the amplitude ratio $A_{\rm RV}/A_{H}=135~{{\mathrm{km~s}^{-1}}}~{\rm mag}^{-1}$, while thin curves have those with the ratio larger by 30 % [@Nardetto-2011 see text]. Horizontal lines indicate the estimated mean velocities; thick dashed lines are given by the smaller amplitude ratio and dotted lines by the larger ratio. \[fig:phase\_cor\]](fig6.ps){width="0.98\hsize"}

[crrrrrrr]{} & 2455368.90243 & 0.62 & $+121.1$ & $+128.9$ & $-7$ & 2.1\
& 2456074.08954 & 0.59 & $+125.0$ & $+132.7$ & $-4$ & 1.9\
& 2456135.81792 & 0.22 & $ +97.3$ & $+105.1$ & $+25$ & 1.4\
& & Mean & $ +119$ & $+127$ &\
& 2456073.96453 & 0.13 & $ -75.6$ & $ -68.0$ & $+17$ & 6.2\
& 2456135.88041 & 