Table 1: Instrumental configurations used.
Nr. Observatory Epoch(s) Telescope Spectrograph Recip. disp. $\Delta\lambda$ exp. time S/N

(Å mm^-1) (Å) (min)

I CTIO 1982 Feb. - 1985 March 1-m CITS 45 3700-4900 20 30-60

II CASLEO (1997 - 1998) Feb. 2.1-m REOSC 7 3700-6000 30 20-50

III CASLEO 1997 March - 1999 May 2.1-m B&C 115 3800-5000 20 120-200

**Table 1:** Instrumental configurations used.
Nr.	Observatory	Epoch(s)	Telescope	Spectrograph	Recip. disp.	$\Delta\lambda$	exp. time	S/N
					(Å mm^-1)	(Å)	(min)
I	CTIO	1982 Feb. - 1985 March	1-m	CITS	45	3700-4900	20	30-60
II	CASLEO	(1997 - 1998) Feb.	2.1-m	REOSC	7	3700-6000	30	20-50
III	CASLEO	1997 March - 1999 May	2.1-m	B&C	115	3800-5000	20	120-200

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