JHU Mirror

TABLE Photoz

The photometrically estimated redshifts for all galaxies 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

objID bigint 8 ID_MAIN unique ID pointing to PhotoObjAll table

z real 4 REDSHIFT_PHOT photometric redshift

zErr real 4 REDSHIFT_PHOT ERROR error of the photometric redshift

nnCount smallint 2 NUMBER nearest neighbors after excluding the outliers

nnVol real 4 NUMBER gives the 4 dimensional volume of the rectangular bounding box of the nnCount nearest neighbors

nnIsInside smallint 2 CODE_MISC shows if the object to be estimated is inside or outside of the box

nnObjID bigint 8 ID_IDENTIFIER objID of the (first) nearest neighbor

nnSpecz real 4 REDSHIFT spectroscopic redshift of the (first) nearest neighbor

nnFarObjID bigint 8 ID_IDENTIFIER objID of the farthest neighbor

nnAvgZ real 4 REDSHIFT average redshift of the nearest neighbors

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

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

pzType real 4 CLASS_OBJECT photometric SED type between 0 and 1

rest_ug real 4 PHOT_CI rest frame u-g color

rest_gr real 4 PHOT_CI rest frame g-r color

rest_ri real 4 PHOT_CI rest frame r-i color

rest_iz real 4 PHOT_CI rest frame i-z color

kcorr_u real 4 PHOT_K-CORRECTION k correction

kcorr_g real 4 PHOT_K-CORRECTION k correction

kcorr_r real 4 PHOT_K-CORRECTION k correction

kcorr_i real 4 PHOT_K-CORRECTION k correction

kcorr_z real 4 PHOT_K-CORRECTION k correction

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

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

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

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

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

name	type	length	unit	ucd	description
objID	bigint	8		ID_MAIN	unique ID pointing to PhotoObjAll table
z	real	4		REDSHIFT_PHOT	photometric redshift
zErr	real	4		REDSHIFT_PHOT ERROR	error of the photometric redshift
nnCount	smallint	2		NUMBER	nearest neighbors after excluding the outliers
nnVol	real	4		NUMBER	gives the 4 dimensional volume of the rectangular bounding box of the nnCount nearest neighbors
nnIsInside	smallint	2		CODE_MISC	shows if the object to be estimated is inside or outside of the box
nnObjID	bigint	8		ID_IDENTIFIER	objID of the (first) nearest neighbor
nnSpecz	real	4		REDSHIFT	spectroscopic redshift of the (first) nearest neighbor
nnFarObjID	bigint	8		ID_IDENTIFIER	objID of the farthest neighbor
nnAvgZ	real	4		REDSHIFT	average redshift of the nearest neighbors
dmod	real	4		PHOT_DIST-MOD	the distance modulus for Omega=0.3, Lambda=0.7 cosmology
chiSq	real	4		STAT_LIKELIHOOD	the chi-square value for the fit
pzType	real	4		CLASS_OBJECT	photometric SED type between 0 and 1
rest_ug	real	4		PHOT_CI	rest frame u-g color
rest_gr	real	4		PHOT_CI	rest frame g-r color
rest_ri	real	4		PHOT_CI	rest frame r-i color
rest_iz	real	4		PHOT_CI	rest frame i-z color
kcorr_u	real	4		PHOT_K-CORRECTION	k correction
kcorr_g	real	4		PHOT_K-CORRECTION	k correction
kcorr_r	real	4		PHOT_K-CORRECTION	k correction
kcorr_i	real	4		PHOT_K-CORRECTION	k correction
kcorr_z	real	4		PHOT_K-CORRECTION	k correction
absMag_u	real	4		PHOT_ABS-MAG PHOT_SDSS_U	rest frame u' abs magnitude
absMag_g	real	4		PHOT_ABS-MAG PHOT_SDSS_G	rest frame g' abs magnitude
absMag_r	real	4		PHOT_ABS-MAG PHOT_SDSS_R	rest frame r' abs magnitude
absMag_i	real	4		PHOT_ABS-MAG PHOT_SDSS_I	rest frame i' abs magnitude
absMag_z	real	4		PHOT_ABS-MAG PHOT_SDSS_Z	rest frame z' abs magnitude