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Table A.2

Supergiant identification efficiency and contamination of the PCA method for the Gaia line list, and their errors, for our whole sample, depending on the putative boundary used.

Boundary Subsample Efficiency Contamination

Early 0.98 ± 0.06 0.01 ± 0.06
K5 Late 0.95 ± 0.06 0.05 ± 0.06
All 0.97 ± 0.04 0.03 ± 0.04

Early 0.99 ± 0.05 0.01 ± 0.05
M0 Late 0.93 ± 0.07 0.06 ± 0.07
All 0.97 ± 0.04 0.03 ± 0.04

Early 0.99 ± 0.05 0.01 ± 0.05
M1 Late 0.91 ± 0.08 0.07 ± 0.08
All 0.97 ± 0.04 0.03 ± 0.04

Early 0.99 ± 0.05 0.02 ± 0.05
M2 Late 0.89 ± 0.09 0.08 ± 0.09
All 0.97 ± 0.04 0.03 ± 0.04

Early 0.99 ± 0.04 0.02 ± 0.04
M3 Late 0.77 ± 0.12 0.07 ± 0.13
All 0.97 ± 0.04 0.02 ± 0.04

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