Mixture models for photometric redshifts | Astronomy & Astrophysics (A&A)

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Volume 650 (June 2021)

A&A, 650 (2021) A90

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Table 5.

MDN performance evaluation.

IGMM implementation	Photometry	⟨Δz⟩ (z_s < 1)	rms(Δz) (z_s < 1)	⟨Δz⟩, range1 ^(a)
Fully unsup.	griz, W1, W2	0.0007 ± 0.0006	0.0204 ± 0.0106	0.0025 ± 0.0005
Spec. class	griz, W1, W2	0.0030 ± 0.0028	0.0216 ± 0.0104	0.0042 ± 0.039
Redshift (z_s)	griz, W1, W2	0.0022 ± 0.0024	0.0207 ± 0.0113	0.0008 ± 0.0003
Spec. class, z_s	griz, W1, W2	0.0001 ± 0.0005	0.0208 ± 0.0112	0.0058 ± 0.0006
Spec. class	ugriz, W1, W2	0.0023 ± 0.0026	0.0181 ± 0.0091	0.0004 ± 0.0025

IGMM implementation	photometry	rms(Δz), range1 ^(a)	rms(Δz), range2 ^(b)	rms(Δz), range3 ^(c)

Fully unsup.	griz, W1, W2	0.0215 ± 0.0013	0.0233 ± 0.0013	0.0238 ± 0.0015
Spec. class	griz, W1, W2	0.0230 ± 0.0015	0.0245 ± 0.0019	0.0247 ± 0.0014
Redshift (z_s)	griz, W1, W2	0.0219 ± 0.0014	0.0238 ± 0.0012	0.0242 ± 0.0013
Spec. class, z_s	griz, W1, W2	0.0218 ± 0.0019	0.0235 ± 0.0019	0.0235 ± 0.0024
Spec. class	ugriz, W1, W2	0.0179 ± 0.0015	0.0182 ± 0.0016	0.0187 ± 0.0019

Notes. The bias and rms are computed using the definition of clipped bias and rms in PS1-STR (Beck et al. 2021).

^(a)

Restricted to galaxies with z_s < 0.3;

^(b)

restricted to galaxies with z_s < 0.4;

^(c)

restricted to galaxies with z_s < 0.5.

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