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Table 3

Periodicities derived from the radial velocity of N iv, N v, C iv, He ii emission lines and the mean absorption.

Feature P [d] Error [d]

N ivλ4058 9.1444 0.0005
N vλ4604 9.1455 0.0005
N vλ4944 9.1443 0.0009
C ivλ5812 9.146 0.002
He iiλ4686 9.1447 0.0005
He iiλ5411 9.1447 0.0003
He iiλ4200 9.145 0.001
He iiλ4542 9.140 0.002
Mean Abs. 9.1415 0.0005

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