Spectroscopy of very low mass stars and brown dwarfs in the Lambda Orionis star forming region - I. Enlarging the census down to the planetary mass domain in Collinder 69

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Table 2

A summary of the Collinder 69 near infrared spectroscopic campaigns.

Date	Observatory/Telescope/Instrument	Resolution	Wavelength	Number of sources	Original photometric
		Δλ/λ	coverage	observed	survey

Dec. 22–23, 2004	Mauna Kea/Keck/NIRSPEC	~2000	1.143–1.375 μm	4^*	CFHT1999
Dec. 9, 2005	Mauna Kea/Keck/NIRSPEC	~2000	1.143–1.375 μm	9^*	CFHT1999
Jan. 9–11, 2007	La Silla/NTT /SOFI	~950	0.950–2.500 μm	2	CFHT1999
Nov. 10, 2008	Mauna Kea/Subaru /IRCS	~150	1.400–2.500 μm	8^*	Subaru2006

Notes.

^(*)

For some of the sources, the obtained S/N was too low because of poor weather conditions to perform the analysis, hence are not listed in the tables with the results from these analyses.

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