Neutral atomic-carbon quasar absorption-line systems at z> 1.5 - Sample selection, H i content, reddening, and 2175 Å extinction feature

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Table 2

Intervening C i-absorber number counts.

C i samples	W_r(λ1560)	z_min	z_max	Δz	# of C i	n_{C i}^a
	[Å]					(× 10^-3)


All systems	≥ 0.4	1.5	1.9	6268	22	3.5 ± 0.8
		1.9	3.35	6710	8	1.2 ± 0.4
Strongest	≥ 0.64	1.5	1.9	6268	10	1.6 ± 0.5
		1.9	3.35	6710	4	0.6 ± 0.3
Weaker	≥ 0.4,< 0.64	1.5	1.9	6268	12	1.9 ± 0.6
		1.9	3.35	6710	4	0.6 ± 0.3

Notes.

^(a)

Prior to correcting for incompleteness (i.e., ~18% at W_r(λ1560) = 0.4 Å).

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