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Table 2.

Possible 2.4 < z < 3.1 SBLA samples, their flux transmission boundaries (in 138 |$\, \, {\rm km}\, {\rm s}^{-1}$| bins and their purity to true (noiseless) flux transmission of F_Ly α < 0.25.

Sample	F_lower	F_upper	Purity (per cent)	Number of systems
FS0	−0.05	0.05	89	42 210
FS1	0.05	0.15	81	86 938
FS2	0.15	0.25	55	141 544
P30	−0.05	0.25^{a, b}	63	335 259
P75	−0.05	0.25^a	90	124 955
P90	−0.05	0.25^a	97	74 660

Sample	F_lower	F_upper	Purity (per cent)	Number of systems
FS0	−0.05	0.05	89	42 210
FS1	0.05	0.15	81	86 938
FS2	0.15	0.25	55	141 544
P30	−0.05	0.25^{a, b}	63	335 259
P75	−0.05	0.25^a	90	124 955
P90	−0.05	0.25^a	97	74 660

Notes.^aHard limit. True maximum is a function of S/N tuned for desired minimum purity.

^bRedshift limited version of sample used in Pérez-Ràfols et al. (2023).

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