Massive stars on the verge of exploding: the properties of oxygen sequence Wolf-Rayet stars

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Table 2

Overview of observations.


ID	MJD	T _exp ^a	Slit width^a	Spec. Standard	Airmass
	At start exp.	(s)	(″)


WR102	56 490.069	4 × 120	0.8, 0.9, 0.9	GD153	1.0
WR142	56 783.371	8 × 200 / 260 / 260	0.8, 0.9, 0.9	LTT7987	2.3
WR93b	56 489.138	4 × 600	0.8, 0.9, 0.9	EG274	1.0
BAT99-123	56 409.978	10 × 180	0.8, 0.9, 0.9	LTT3218	1.7
LH41-1042	56 522.351	10 × 180	0.8, 0.9, 0.9	FEIGE-110	1.8


WR30a	56 771.212	8 × 200 / 260 / 260	0.8, 0.9, 0.9	LTT7987	1.6
SK188	56 522.388	8 × 40	0.5, 0.7, 0.4	EG274	1.5

Notes.

^(a)

If a single value is given it is the same for all three X-Shooter arms; if three values are given it is for the UVB, VIS and NIR arms, respectively.

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