Targeting cluster galaxies for the 4MOST CHANCES Low-z sub-survey with photometric redshifts

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Volume 706 (February 2026)

A&A, 706 (2026) A34

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Table 1.

Completeness and purity values for low- and bright-z sub-surveys.

ID	C_A		C₆		T80S/S-PLUS		LS-DR9		LS-DR10		LS-DR10-CBPF

	C	P	C	P	C	P	C	P	C	P	C	P
S1501	0.853	0.801	0.868	0.857	0.933	0.871	0.668	0.902	0.813	0.859	0.760	0.855
S1505	0.760	0.813	0.859	0.834	0.833	0.835	-=	–	–	–	0.532	0.781

ID	C_A		C₁₆		T80S/S-PLUS		LS-DR9		LS-DR10		LS-DR10-CBPF

	C	P	C	P	C	P	C	P	C	P	C	P

S1501	0.853	0.801	0.934	0.807	0.860	0.849	0.751	0.854	0.777	0.839	0.862	0.807
S1505	0.760	0.813	0.889	0.829	0.858	0.829	–	–	–	–	0.669	0.823

Notes. Completeness and purity values for low- and bright-z sub-surveys considering each z_phot selections individually and the corresponding combined values. The upper panel considers (C₆) considers clusters A0500, A0957, A1631, A2717, A3223, A3809, which have good z_spec coverage throughout all the r-band magnitude range m_r < 20.4, while the lower cells correspond to the extended sample (C₁₆) including clusters with T80S/S-PLUS coverage larger than 80%: A0500, A1631, A1644, A2399, A3266, A3376, A3490, A3667, A3716, A3809. C_{_A} considers all the CHANCES-Low-z clusters regardless their T80S/S-PLUS or z_spec coverages.

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