TABLE Photoz

The photometrically estimated redshifts for all objects in PhotoObjAll.

Please see the Photometric Redshifts entry in Algorithms for more information about the Photoz and Photoz2 tables. NOTE: This table may be empty initially because the photoz values
are computed in a separate calculation after the main data release.

name type length unit ucd description

pId int 4 CODE_MISC unique Id for photoz version

rank int 4 NUMBER the rank of the photoz determination for this object, default is 0

version varchar 6 ID_VERSION the version of photoz code

class int 4 CLASS_OBJECT char describing the object type (galaxy:1, QSO:tbd, ...)

objID bigint 8 ID_MAIN unique ID pointing to PhotoObjAll table

chiSq real 4 STAT_LIKELIHOOD the chi-square value for the fit

z real 4 REDSHIFT_PHOT photometric redshift

zErr real 4 REDSHIFT_PHOT ERROR the marginalized error of the photometric redshift

t real 4 CLASS_OBJECT photometric SED type between 0 and 1

tErr real 4 CLASS_OBJECT ERROR the marginalized error of the photometric type

c_tt real 4 STAT_COVARIANCE tt element of covariance matrix

c_tz real 4 STAT_COVARIANCE tz element of covariance matrix

c_zz real 4 STAT_COVARIANCE zz element of covariance matrix

fitRadius int 4 pix EXTENSION_RAD radius of area used for covariance fit

fitThreshold real 4 STAT_PROBABILITY probability threshold for covariance fitting, peak normalized to 1

quality int 4 CODE_QUALITY integer describing the quality (best:5, lowest 0)

dmod real 4 mag PHOT_DIST-MOD the distance modulus for Omega=0.3, Lambda=0.7 cosmology

rest_ug real 4 mag PHOT_CI rest frame u-g color

rest_gr real 4 mag PHOT_CI rest frame g-r color

rest_ri real 4 mag PHOT_CI rest frame r-i color

rest_iz real 4 mag PHOT_CI rest frame i-z color

kcorr_u real 4 mag PHOT_K-CORRECTION k correction

kcorr_g real 4 mag PHOT_K-CORRECTION k correction

kcorr_r real 4 mag PHOT_K-CORRECTION k correction

kcorr_i real 4 mag PHOT_K-CORRECTION k correction

kcorr_z real 4 mag PHOT_K-CORRECTION k correction

absMag_u real 4 mag PHOT_ABS-MAG PHOT_SDSS_U rest frame u' abs magnitude

absMag_g real 4 mag PHOT_ABS-MAG PHOT_SDSS_G rest frame g' abs magnitude

absMag_r real 4 mag PHOT_ABS-MAG PHOT_SDSS_R rest frame r' abs magnitude

absMag_i real 4 mag PHOT_ABS-MAG PHOT_SDSS_I rest frame i' abs magnitude

absMag_z real 4 mag PHOT_ABS-MAG PHOT_SDSS_Z rest frame z' abs magnitude

name	type	length	unit	ucd	description
pId	int	4		CODE_MISC	unique Id for photoz version
rank	int	4		NUMBER	the rank of the photoz determination for this object, default is 0
version	varchar	6		ID_VERSION	the version of photoz code
class	int	4		CLASS_OBJECT	char describing the object type (galaxy:1, QSO:tbd, ...)
objID	bigint	8		ID_MAIN	unique ID pointing to PhotoObjAll table
chiSq	real	4		STAT_LIKELIHOOD	the chi-square value for the fit
z	real	4		REDSHIFT_PHOT	photometric redshift
zErr	real	4		REDSHIFT_PHOT ERROR	the marginalized error of the photometric redshift
t	real	4		CLASS_OBJECT	photometric SED type between 0 and 1
tErr	real	4		CLASS_OBJECT ERROR	the marginalized error of the photometric type
c_tt	real	4		STAT_COVARIANCE	tt element of covariance matrix
c_tz	real	4		STAT_COVARIANCE	tz element of covariance matrix
c_zz	real	4		STAT_COVARIANCE	zz element of covariance matrix
fitRadius	int	4	pix	EXTENSION_RAD	radius of area used for covariance fit
fitThreshold	real	4		STAT_PROBABILITY	probability threshold for covariance fitting, peak normalized to 1
quality	int	4		CODE_QUALITY	integer describing the quality (best:5, lowest 0)
dmod	real	4	mag	PHOT_DIST-MOD	the distance modulus for Omega=0.3, Lambda=0.7 cosmology
rest_ug	real	4	mag	PHOT_CI	rest frame u-g color
rest_gr	real	4	mag	PHOT_CI	rest frame g-r color
rest_ri	real	4	mag	PHOT_CI	rest frame r-i color
rest_iz	real	4	mag	PHOT_CI	rest frame i-z color
kcorr_u	real	4	mag	PHOT_K-CORRECTION	k correction
kcorr_g	real	4	mag	PHOT_K-CORRECTION	k correction
kcorr_r	real	4	mag	PHOT_K-CORRECTION	k correction
kcorr_i	real	4	mag	PHOT_K-CORRECTION	k correction
kcorr_z	real	4	mag	PHOT_K-CORRECTION	k correction
absMag_u	real	4	mag	PHOT_ABS-MAG PHOT_SDSS_U	rest frame u' abs magnitude
absMag_g	real	4	mag	PHOT_ABS-MAG PHOT_SDSS_G	rest frame g' abs magnitude
absMag_r	real	4	mag	PHOT_ABS-MAG PHOT_SDSS_R	rest frame r' abs magnitude
absMag_i	real	4	mag	PHOT_ABS-MAG PHOT_SDSS_I	rest frame i' abs magnitude
absMag_z	real	4	mag	PHOT_ABS-MAG PHOT_SDSS_Z	rest frame z' abs magnitude