Table 1: Observing logbook of our spectroscopic observations of $\ensuremath {\beta }$ CMa.
Number of JD

observations 2 450 000 +

Start End

22 1591 1598

26 1654 1660

70 1882 1894

62 1940 1953

60 2227 2239

27 2569 2582

2 2624 2624

91 2983 2994

54 3072 3085

38 3271 3283

**Table 1:** Observing logbook of our spectroscopic observations of $\ensuremath {\beta }$ CMa.
Number of	JD
observations	2 450 000 +
	Start	End
22	1591	1598
26	1654	1660
70	1882	1894
62	1940	1953
60	2227	2239
27	2569	2582
2	2624	2624
91	2983	2994
54	3072	3085
38	3271	3283

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