Table 3: NGC 1901 abundance analysis with NLTE correction applied when necessary.

Element	LTE value	NLTE value
	dex	dex
[FeI/H]	-0.08  0.02
[FeII/H]	-0.08  0.03
[OI/H]7774	+0.05  0.09	-0.06  0.09
[OI/H]6300	-0.05  0.10
[NaI/H]	-0.12  0.09	-0.02  0.09
[MgI/H]	-0.29  0.06	-0.13  0.06
[SiI/H]	-0.05  0.06
[CaI/H]	-0.15  0.06
[TiI/H]	-0.08  0.03
[TiII/H]	-0.08  0.06
[CrI/H]	-0.08  0.04
[NiI/H]	-0.09  0.03
[BaII/H]	+0.27  0.06