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 A.1.

Recent automated approaches to estimate photo-zs.

Reference	Method ^(a)	Photometric information	Objects	z_s range ^(b)	Depth [mag] ^(c)	Survey
1	kNN	ugrizy^(d)	Galaxies	0 < z ≤ 2	i < 25.3	mock galaxy for LSST from DESC
2	ANN	ugriz^(e),E(B − V)	Galaxies	z < 0.4	r_Petro ≤ 17.8	SDSS-DR12
3	METAPHOr,	ugri GAaP	Galaxies	z_s ≤ 1	r ≤ 21	SDSS-DR9,
	ANN,					KiDS ESO-DR3,
	template fitting					GAMA-DR2, 2dFGRS
4	ANN	ugriz^(e)	Galaxies	z_s ≤ 0.4	r_Petro ≤ 17.8	SDSS/BOSS-DR12, GAMA-DR3
5	kNN	UV, ugrizy, YJHK	Galaxies	0.3 < z_s < 3.0	i < 25	Mock galaxy catalogues for Euclid, RST,
						and/or CASTOR
6	kNN	UV, ugriz,w1w2w3w4	QSOs	–	14.7 < r < 22.6	SDSS-DR12, 2MASS,WISE
7	kNN	grizy	Galaxies	z_s > 0.01	18.5 < i < 25	SDSS/BOSS-DR14, DEEP2/3DR4,
						VANDELS-DR2,
						COSMOS, C3R2,
						COSMOS2015
8	Tree based	ugriz, BRI	Galaxies	0.02 ≤ z_s ≤ 0.3	B_AB < 24.1	SDSS/MGS-DR7,
						DEEP2-DR4
9	Tree based	ugriz	Galaxies	z_s ≤ 0.55	r_Petro < 17.77	SDSS-DR6, 2dF-SDSSLRG, 2SLAQ, DEEP2
10	Gaussian process	griz, RIZ,YJH	Galaxies	0 ≤ z_s ≤ 2	RIZ < 25	SDSS/BOSS
11	ensemble of	ugriz	Galaxies	z_s < 0.8	i_AB ≲ 22.5	SDSS/BOSS-DR10
	ANNs, trees
	and kNN
12	ANN,	grizy^(f),	Galaxies,	z_s < 1.5	i ≲ 23.1	PS1 3π DR1,
	Monte-Carlo, extrapolation	E(B − V) ^(g)	QSOs, Stars			SDSS-DR14, DEEP2-DR4, VIPERS PDR-2, WiggleZ, zCOSMOS-DR3, VVDS

Notes.

^(a)

Acronyms are defined in the respective literature;

^(b)

spectroscopic redshift range.

^(c)

Petrosian r-band magnitude, r_Petro;

^(d)

grey scale 48 × 48 pixel images;

^(e)

images in ugriz, 64 × 64 piexels in each band;

^(f)

magnitudes for PSF, Kron and seeing-matched apertures (FPSFMag, FKronMag and FApMag, respectively), as well as 3.00″, 4.63″ and 7.43″ fixed-radius apertures (FmeanMagR5, FmeanMagR6 and FmeanMagR7);

^(g)

PS1 and Planck extinction maps.

References. (1) Schmidt et al. (2020); (2) Pasquet et al. (2019); (3) Amaro et al. (2019); (4) Shuntov et al. (2020); (5) Graham et al. (2018); (6) Curran (2020); (7) Nishizawa et al. (2020); (8) Carrasco Kind & Brunner (2013); (9) Gerdes et al. (2010); (10) Almosallam et al. (2016); (11) Sadeh et al. (2019); (12) Beck et al. (2021).

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