Table 8: Velocity shifts for selected lines in the 103-spectrum composite. Error estimates are deduced from fitting same profiles with different fitting parameters (see text), and the listed shifts are means of the three measurements. Laboratory wavelengths are from Martin et al. (1999). Last column: comments on line strength and profile.
$\lambda_{{\rm lab}}$ (air) Ident.      $\Delta\lambda$      $\Delta {{\rm RV}} \pm\sigma$ Notes

Å      Å      $~{\rm km}~{\rm s}^{-1}$

4437.554 He I      -0.199      $-13.4\pm1.4$ 3.5%, blended region

4552.622 Si III      -0.222      $-14.6\pm0.7$ 9%

4567.840 Si III      -0.235      $-15.5\pm0.8$ 8%

4574.757 Si III      -0.274      $-18.0\pm0.3$ 4.5%

4590.974 O II      -0.225      $-14.7\pm1.3$ 5.5%

4596.177 O II      -0.280      $-18.2\pm0.7$ 5%, multicomponent

4661.632 O II      -0.271      $-17.4\pm1.0$ 5%, slight asymm.

**Table 8:** Velocity shifts for selected lines in the 103-spectrum composite. Error estimates are deduced from fitting same profiles with different fitting parameters (see text), and the listed shifts are means of the three measurements. Laboratory wavelengths are from Martin et al. (1999). Last column: comments on line strength and profile.
$\lambda_{{\rm lab}}$ (air)	Ident.	$\Delta\lambda$	$\Delta {{\rm RV}} \pm\sigma$	Notes
Å		Å	$~{\rm km}~{\rm s}^{-1}$
4437.554	He I	-0.199	$-13.4\pm1.4$	3.5%, blended region
4552.622	Si III	-0.222	$-14.6\pm0.7$	9%
4567.840	Si III	-0.235	$-15.5\pm0.8$	8%
4574.757	Si III	-0.274	$-18.0\pm0.3$	4.5%
4590.974	O II	-0.225	$-14.7\pm1.3$	5.5%
4596.177	O II	-0.280	$-18.2\pm0.7$	5%, multicomponent
4661.632	O II	-0.271	$-17.4\pm1.0$	5%, slight asymm.

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and reduction
	3 Ephemeris and period analysis
	4 Spectroscopic analysis
	5 Photometric analysis
	6 Absolute dimensions and evolutionary status
	7 Conclusions
	References