Table 1: Sources of spectroscopic observations.
Source Code Tel. and equip. Aperture

1 2 3 4

SAO (Russia) L1 1 m+UAGS 4.2'' $\times$ 19.8''

SAO (Russia) L1 1 m+UAGS 8.0'' $\times$ 19.8''

SAO (Russia) L 6 m+UAGS 2.0'' $\times$ 6.0''

Guillermo Haro GH 2.1 m+B and C 2.5'' $\times$ 6.0''

Obs. (Mexico)

**Table 1:** Sources of spectroscopic observations.
Source	Code	Tel. and equip.	Aperture
1	2	3	4
SAO (Russia)	L1	1 m+UAGS	4.2'' $\times$ 19.8''
SAO (Russia)	L1	1 m+UAGS	8.0'' $\times$ 19.8''
SAO (Russia)	L	6 m+UAGS	2.0'' $\times$ 6.0''
Guillermo Haro	GH	2.1 m+B and C	2.5'' $\times$ 6.0''
Obs. (Mexico)

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