Table 2: The parameters of the orbital modulation of the emission lines radial velocities.
Lines $\gamma$ ( $\rm km~s^{-1}$ ) K ( $\rm km~s^{-1}$ ) Phase (*)

H $_{\gamma}{ }$ -24.5 (5.2) 47.1 (6.9) -0.07 (0.07)

HeII( 4686 Å) -60.1 (8.7) 71.3 (11.7) +0.08 (0.09)

H $_{\beta}$ -30.6 (4.5) 53.9 (6.1) -0.07 (0.06)

H $_{\alpha }{ }$ -31.6 (3.0) 60.0.(4.0) 0.0 (fixed)

* Phase of the blue-to-red zero crossing.
1- $\sigma$ error bars into parentheses.

**Table 2:** The parameters of the orbital modulation of the emission lines radial velocities.
Lines	$\gamma$ ( $\rm km~s^{-1}$ )	K ( $\rm km~s^{-1}$ )	Phase (*)
H $_{\gamma}{ }$	-24.5 (5.2)	47.1 (6.9)	-0.07 (0.07)
HeII( 4686 Å)	-60.1 (8.7)	71.3 (11.7)	+0.08 (0.09)
H $_{\beta}$	-30.6 (4.5)	53.9 (6.1)	-0.07 (0.06)
H $_{\alpha }{ }$	-31.6 (3.0)	60.0.(4.0)	0.0 (fixed)

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