Table 2.
Statistics of photometric redshift performance for KiDS-Bright crossmatched with various spectroscopic samples.
| Sample | Size 1 | ⟨zspec⟩ | Photo-z model | ⟨zphot⟩ | ⟨δz⟩ | ⟨Δz⟩ | σΔz | SMAD(Δz) |
|---|---|---|---|---|---|---|---|---|
| GAMA Equatorial 2 | 145 493 | 0.229 | ANNz2 | 0.229 | 0.0005 | 0.0009 | 0.0237 | 0.0178 |
| Hybrid-z (this work) | 0.224 | −0.0044 | −0.0031 | 0.0187 | 0.0144 | |||
| 2dFGRS 3 | 53 179 | 0.119 | ANNz2 | 0.122 | 0.0022 | 0.0022 | 0.0238 | 0.0158 |
| Hybrid-z (this work) | 0.120 | 0.0004 | 0.0006 | 0.0167 | 0.0123 | |||
| SDSS DR16 4 | 43 581 | 0.221 | ANNz2 | 0.220 | −0.0011 | −0.0002 | 0.0221 | 0.0157 |
| Hybrid-z (this work) | 0.217 | −0.0034 | −0.0023 | 0.0158 | 0.0116 | |||
| GAMA G23 5 | 34 941 | 0.215 | ANNz2 | 0.217 | 0.0021 | 0.0022 | 0.0244 | 0.0166 |
| Hybrid-z (this work) | 0.213 | −0.0027 | −0.0017 | 0.0184 | 0.0137 | |||
| 2dFLenS 6 | 22 128 | 0.251 | ANNz2 | 0.251 | −0.0007 | 0.0005 | 0.0365 | 0.0167 |
| Hybrid-z (this work) | 0.247 | −0.0042 | −0.0025 | 0.0224 | 0.0133 | |||
Notes.
Galaxy And Mass Assembly in the equatorial fields (Driver et al. 2022), used for training both models.
2-degree Field Galaxy Redshift Survey (Colless et al. 2001).
Sloan Digital Sky Survey Data Release 16 (Ahumada et al. 2020).
GAMA in the southern G23 field (Driver et al. 2022), disjoint with the training set.
2-degree Field Lensing Survey (Blake et al. 2016).
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