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Table 2.

Statistics of photometric redshift performance for the KiDS-Bright sample cross-matched with GAMA-eq. Numbers in columns (4)–(7) refer to subsamples kept after applying the cuts in the first column.

Selection Number of Mean Mean of Mean of St. dev. of SMAD of
galaxies redshift δz = zphot − zspec δz/(1 + zspec) δz/(1 + zspec) δz/(1 + zspec)
No cut 10.00 × 105 0.242 4.7 × 10−4 9.1 × 10−4 0.0232 0.0178
⟨r⟩< 19.83 8.96 × 105 0.230 4.8 × 10−4 9.1 × 10−4 0.0230 0.0176
|Dz| (a) < 5.97% (GAMA-based) 8.97 × 105 0.250 −1.8 × 10−4 3.2 × 10−4 0.0219 0.0174
|Dz|< 6.23% (Espec-based) 8.98 × 105 0.248 −0.7 × 10−4 4.1 × 10−4 0.0217 0.0173
Δz(b) < 0.01 (GAMA-based) 8.96 × 105 0.240 −1.0 × 10−4 4.0 × 10−4 0.0218 0.0174
Δz < 0.01 (Espec-based) 8.96 × 105 0.237 −0.2 × 10−4 4.6 × 10−4 0.0218 0.0174
Combined (GAMA-based) (1) 9.11 × 105 0.240 0.4 × 10−4 5.2 × 10−4 0.0220 0.0175
Combined (Espec-based) (2) 9.01 × 105 0.238 0.4 × 10−4 5.1 × 10−4 0.0219 0.0174

Notes. The cuts are based on the SOM cell averages.

(a)

Dz ≡ (⟨zphot⟩cell − ⟨zspec⟩cell)/⟨zspec⟩cell.

(b)

Δz ≡ (⟨zphot⟩cell − ⟨zspec⟩cell)/(1 + ⟨zspec⟩cell).

(1)

⟨r⟩< 19.86 mag & |Dz|< 10.05% & Δz < 0.015.

(2)

⟨r⟩< 19.86 mag & |Dz|< 9.8% & Δz < 0.017.

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