Information on Service 'DESI DR6 DR7'

Further access options are discussed below

DESI photometric redshifts from Legacy Survey DR8. Info at http://batc.bao.ac.cn/~zouhu/online-data/desi_photoz/

For a list of all services and tables belonging to this service's resource, see Information on resource 'DESI photometric redshifts'

Service Documentation

This resource contains photometric redshifts from DESI Legacy survey DR8.

History

20191101

Update from DR6 and DR7 to DR8

20190710

First publication

Overview

You can access this service using:

static -- static (i.e. prepared) data or custom client-side code; probably used to access ancillary files here
form -- allows access via an HTML form
scs.xml -- a standard SCS interface as defined by the IVOA to access catalog-type data; SCS clients use https://herschel-vos.phys.sussex.ac.uk/desi_photoz/q/cone/scs.xml? to access the service

This service is published as follows:

Within the set(s) ivo_managed,local with the renderer form
Within the set(s) ivo_managed with the renderer scs.xml
Within the set(s) ivo_managed with the renderer tap

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

Name	Table Head	Description	Unit	UCD
DEC	Delta (ICRS)	Declination (ICRS decimal)	deg	pos.eq.dec
field	Field	Name of the field in HELP survey	N/A	meta.id;obs.field
hscs_pos	Position/Name	Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object	N/A	N/A
hscs_sr	Search radius	Search radius in arcminutes	N/A	N/A
ID	ID	DESI ID = RELEASE10^12 + BRICKID10^6 + OBJID	N/A	meta.id;meta.main
MAXREC	Match limit	Maximum number of records returned. Pass 0 to retrieve service parameters.	N/A	N/A
MAXREC	Match limit	Maximum number of records returned. Pass 0 to retrieve service parameters.	N/A	N/A
MAXREC	Match limit	Maximum number of records returned. Pass 0 to retrieve service parameters.	N/A	N/A
RA	Alpha (ICRS)	Right Ascension (ICRS decimal)	deg	pos.eq.ra
RESPONSEFORMAT	Output Format	File format requested for output.	N/A	meta.code.mime
RESPONSEFORMAT	Output Format	File format requested for output.	N/A	meta.code.mime
RESPONSEFORMAT	Output Format	File format requested for output.	N/A	meta.code.mime
SR	Search Radius	Search radius	deg	N/A
VERB	Verbosity	Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns.	N/A	N/A
VERB	Verbosity	Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns.	N/A	N/A
VERB	Verbosity	Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns.	N/A	N/A

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

Name	Table Head	Description	Unit	UCD
AGE_BEST	AGE_BEST	Best fitted age in yr	yr	N/A
AGE_INF	AGE_INF	Lower 68% age uncertainty	yr	N/A
AGE_MED	AGE_MED	Median age	yr	N/A
AGE_SUP	AGE_SUP	Upper 68% age uncertainty	yr	N/A
ANYMASK_G	ANYMASK_G	Bitwise mask set if the central pixel from any image satisfies each condition in g	N/A	N/A
ANYMASK_R	ANYMASK_R	Bitwise mask set if the central pixel from any image satisfies each condition in r	N/A	N/A
ANYMASK_Z	ANYMASK_Z	Bitwise mask set if the central pixel from any image satisfies each condition in z	N/A	N/A
CHI_BEST	CHI_BEST	Chi2 of the best fitting	N/A	N/A
DEC	Dec	Declination (J2000)	deg	pos.eq.dec;meta.main
EBV_BEST	EBV_BEST	Best fitted intrinsic extinction in E(B-V), three values: 0, 0.5, 1.0	N/A	N/A
field	Field	Name of the field in HELP survey	N/A	meta.id;obs.field
FRACFLUX_G	FRACFLUX_G	Profile-weighted fraction of the flux from other sources in g (typically [0, 1])	N/A	N/A
FRACFLUX_R	FRACFLUX_R	Profile-weighted fraction of the flux from other sources in r (typically [0, 1])	N/A	N/A
FRACFLUX_W1	FRACFLUX_W1	Profile-weighted fraction of the flux from other sources in W1 (typically [0, 1])	N/A	N/A
FRACFLUX_W2	FRACFLUX_W2	Profile-weighted fraction of the flux from other sources in W2 (typically [0, 1])	N/A	N/A
FRACFLUX_Z	FRACFLUX_Z	Profile-weighted fraction of the flux from other sources in z (typically [0, 1])	N/A	N/A
FRACIN_G	FRACIN_G	Fraction of a source's flux within the blob in g, near unity for real sources	N/A	N/A
FRACIN_R	FRACIN_R	Fraction of a source's flux within the blob in r, near unity for real sources	N/A	N/A
FRACIN_Z	FRACIN_Z	Fraction of a source's flux within the blob in z, near unity for real sources	N/A	N/A
FRACMASKED_G	FRACMASKED_G	Profile-weighted fraction of pixels masked in g, strictly between [0,1]	N/A	N/A
FRACMASKED_R	FRACMASKED_R	Profile-weighted fraction of pixels masked in r, strictly between [0,1]	N/A	N/A
FRACMASKED_Z	FRACMASKED_Z	Profile-weighted fraction of pixels masked in z, strictly between [0,1]	N/A	N/A
GALDEPTH_G	GALDEPTH_G	galaxy depth in g band	N/A	N/A
GALDEPTH_R	GALDEPTH_R	galaxy depth in r band	N/A	N/A
GALDEPTH_Z	GALDEPTH_Z	galaxy depth in z band	N/A	N/A
ID	ID	DESI ID = RELEASE10^12 + BRICKID10^6 + OBJID	N/A	meta.id;meta.main
LUM_K_BEST	LUM_K_BEST	Best fitting K-band luminosity	N/A	N/A
LUM_NUV_BEST	LUM_NUV_BEST	Best fitting NUV luminosity in log(L_sun)	N/A	N/A
LUM_R_BEST	LUM_R_BEST	Best fitting R-band luminosity	N/A	N/A
MAG_ABS_G	MAG_ABS_G	Absolute magnitude in g band	mag	N/A
MAG_ABS_R	MAG_ABS_R	Absolute magnitude in r band	mag	N/A
MAG_ABS_W1	MAG_ABS_W1	Absolute magnitude in w1 band	mag	N/A
MAG_ABS_W2	MAG_ABS_W2	Absolute magnitude in w2 band	mag	N/A
MAG_ABS_Z	MAG_ABS_Z	Absolute magnitude in z band	mag	N/A
MAG_G	MAG_G	g-band magnitude	mag	N/A
MAG_R	MAG_R	r-band magnitude	mag	N/A
MAG_W1	MAG_W1	w1-band magnitdue	mag	N/A
MAG_W2	MAG_W2	w2-band magnitude	mag	N/A
MAG_Z	MAG_Z	z-band mangitude	mag	N/A
MAGERR_G	MAGERR_G	g-band magnitude error	mag	N/A
MAGERR_R	MAGERR_R	r-band magnitude error	mag	N/A
MAGERR_W1	MAGERR_W1	w1-band magnitude error	N/A	N/A
MAGERR_W2	MAGERR_W2	w2-band magnitude error	mag	N/A
MAGERR_Z	MAGERR_Z	z-band magnitude error	mag	N/A
MASS_BEST	MASS_BEST	Best estimated stellar mass in log(M_sun)	N/A	N/A
MASS_INF	MASS_INF	Lower 68% mass uncertainty	N/A	N/A
MASS_MED	MASS_MED	Median mass	N/A	N/A
MASS_SUP	MASS_SUP	Upper 68% mass uncertainty	N/A	N/A
mean_dis	mean_dis	mean Ecludean distance in the color space of neighbours	N/A	N/A
mean_z	mean_z	mean redshift of neigbours	N/A	N/A
MOD_BEST	MOD_BEST	ID of BC03 model spectra	N/A	N/A
n_filter	n_filter	number of filters having colors in color cuts	N/A	N/A
n_neighbour	n_neighbour	number of neighbours	N/A	N/A
nearest_z	nearest_z	nearest redshift of neighbours	N/A	N/A
photo_z	photo_z	estimated photo-z value	N/A	N/A
photo_zerr	photo_zerr	estimated photo-z error	N/A	N/A
RA	RA	Right Ascension (J2000)	deg	pos.eq.ra;meta.main
SCALE_BEST	SCALE_BEST	Scale factor between observed SED and model SED	N/A	N/A
SFR_BEST	SFR_BEST	Best estimated SFR in M_sun/yr	N/A	N/A
SFR_INF	SFR_INF	Lower 68% SFR uncertainty	N/A	N/A
SFR_MED	SFR_MED	Median SFR	N/A	N/A
SFR_SUP	SFR_SUP	Upper 68% SFR uncertainty	N/A	N/A
spec_z	spec_z	sepctroscopic redshift if available	N/A	N/A
SSFR_BEST	SSFR_BEST	Best estimated SSFR, in yr^-1	N/A	N/A
SSFR_INF	SSFR_INF	Lower 68% SSFR uncertainty	N/A	N/A
SSFR_MED	SSFR_MED	Median SSFR	N/A	N/A
SSFR_SUP	SSFR_SUP	Upper 68% SSFR uncertainty	N/A	N/A
TYPE	TYPE	Tractor Type	N/A	N/A

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

Name	Table Head	Description	Unit	UCD	Verb. Level
field	Field	Name of the field in HELP survey	N/A	meta.id;obs.field	1
ID	ID	DESI ID = RELEASE10^12 + BRICKID10^6 + OBJID	N/A	meta.id;meta.main	1
RA	RA	Right Ascension (J2000)	deg	pos.eq.ra;meta.main	1
DEC	Dec	Declination (J2000)	deg	pos.eq.dec;meta.main	1
MAG_G	MAG_G	g-band magnitude	mag	N/A	1
MAG_R	MAG_R	r-band magnitude	mag	N/A	1
MAG_Z	MAG_Z	z-band mangitude	mag	N/A	1
MAG_W1	MAG_W1	w1-band magnitdue	mag	N/A	1
MAG_W2	MAG_W2	w2-band magnitude	mag	N/A	1
MAGERR_G	MAGERR_G	g-band magnitude error	mag	N/A	1
MAGERR_R	MAGERR_R	r-band magnitude error	mag	N/A	1
MAGERR_Z	MAGERR_Z	z-band magnitude error	mag	N/A	1
MAGERR_W1	MAGERR_W1	w1-band magnitude error	N/A	N/A	1
MAGERR_W2	MAGERR_W2	w2-band magnitude error	mag	N/A	1
GALDEPTH_G	GALDEPTH_G	galaxy depth in g band	N/A	N/A	1
GALDEPTH_R	GALDEPTH_R	galaxy depth in r band	N/A	N/A	1
GALDEPTH_Z	GALDEPTH_Z	galaxy depth in z band	N/A	N/A	1
TYPE	TYPE	Tractor Type	N/A	N/A	1
FRACFLUX_G	FRACFLUX_G	Profile-weighted fraction of the flux from other sources in g (typically [0, 1])	N/A	N/A	1
FRACFLUX_R	FRACFLUX_R	Profile-weighted fraction of the flux from other sources in r (typically [0, 1])	N/A	N/A	1
FRACFLUX_Z	FRACFLUX_Z	Profile-weighted fraction of the flux from other sources in z (typically [0, 1])	N/A	N/A	1
FRACFLUX_W1	FRACFLUX_W1	Profile-weighted fraction of the flux from other sources in W1 (typically [0, 1])	N/A	N/A	1
FRACFLUX_W2	FRACFLUX_W2	Profile-weighted fraction of the flux from other sources in W2 (typically [0, 1])	N/A	N/A	1
FRACMASKED_G	FRACMASKED_G	Profile-weighted fraction of pixels masked in g, strictly between [0,1]	N/A	N/A	1
FRACMASKED_R	FRACMASKED_R	Profile-weighted fraction of pixels masked in r, strictly between [0,1]	N/A	N/A	1
FRACMASKED_Z	FRACMASKED_Z	Profile-weighted fraction of pixels masked in z, strictly between [0,1]	N/A	N/A	1
FRACIN_G	FRACIN_G	Fraction of a source's flux within the blob in g, near unity for real sources	N/A	N/A	1
FRACIN_R	FRACIN_R	Fraction of a source's flux within the blob in r, near unity for real sources	N/A	N/A	1
FRACIN_Z	FRACIN_Z	Fraction of a source's flux within the blob in z, near unity for real sources	N/A	N/A	1
ANYMASK_G	ANYMASK_G	Bitwise mask set if the central pixel from any image satisfies each condition in g	N/A	N/A	1
ANYMASK_R	ANYMASK_R	Bitwise mask set if the central pixel from any image satisfies each condition in r	N/A	N/A	1
ANYMASK_Z	ANYMASK_Z	Bitwise mask set if the central pixel from any image satisfies each condition in z	N/A	N/A	1
n_neighbour	n_neighbour	number of neighbours	N/A	N/A	1
n_filter	n_filter	number of filters having colors in color cuts	N/A	N/A	1
photo_z	photo_z	estimated photo-z value	N/A	N/A	1
photo_zerr	photo_zerr	estimated photo-z error	N/A	N/A	1
spec_z	spec_z	sepctroscopic redshift if available	N/A	N/A	1
mean_z	mean_z	mean redshift of neigbours	N/A	N/A	1
nearest_z	nearest_z	nearest redshift of neighbours	N/A	N/A	1
mean_dis	mean_dis	mean Ecludean distance in the color space of neighbours	N/A	N/A	1
CHI_BEST	CHI_BEST	Chi2 of the best fitting	N/A	N/A	1
MOD_BEST	MOD_BEST	ID of BC03 model spectra	N/A	N/A	1
EBV_BEST	EBV_BEST	Best fitted intrinsic extinction in E(B-V), three values: 0, 0.5, 1.0	N/A	N/A	1
SCALE_BEST	SCALE_BEST	Scale factor between observed SED and model SED	N/A	N/A	1
MAG_ABS_G	MAG_ABS_G	Absolute magnitude in g band	mag	N/A	1
MAG_ABS_R	MAG_ABS_R	Absolute magnitude in r band	mag	N/A	1
MAG_ABS_Z	MAG_ABS_Z	Absolute magnitude in z band	mag	N/A	1
MAG_ABS_W1	MAG_ABS_W1	Absolute magnitude in w1 band	mag	N/A	1
MAG_ABS_W2	MAG_ABS_W2	Absolute magnitude in w2 band	mag	N/A	1
AGE_BEST	AGE_BEST	Best fitted age in yr	yr	N/A	1
AGE_INF	AGE_INF	Lower 68% age uncertainty	yr	N/A	1
AGE_MED	AGE_MED	Median age	yr	N/A	1
AGE_SUP	AGE_SUP	Upper 68% age uncertainty	yr	N/A	1
MASS_BEST	MASS_BEST	Best estimated stellar mass in log(M_sun)	N/A	N/A	1
MASS_INF	MASS_INF	Lower 68% mass uncertainty	N/A	N/A	1
MASS_MED	MASS_MED	Median mass	N/A	N/A	1
MASS_SUP	MASS_SUP	Upper 68% mass uncertainty	N/A	N/A	1
SFR_BEST	SFR_BEST	Best estimated SFR in M_sun/yr	N/A	N/A	1
SFR_INF	SFR_INF	Lower 68% SFR uncertainty	N/A	N/A	1
SFR_MED	SFR_MED	Median SFR	N/A	N/A	1
SFR_SUP	SFR_SUP	Upper 68% SFR uncertainty	N/A	N/A	1
SSFR_BEST	SSFR_BEST	Best estimated SSFR, in yr^-1	N/A	N/A	1
SSFR_INF	SSFR_INF	Lower 68% SSFR uncertainty	N/A	N/A	1
SSFR_MED	SSFR_MED	Median SSFR	N/A	N/A	1
SSFR_SUP	SSFR_SUP	Upper 68% SSFR uncertainty	N/A	N/A	1
LUM_NUV_BEST	LUM_NUV_BEST	Best fitting NUV luminosity in log(L_sun)	N/A	N/A	1
LUM_R_BEST	LUM_R_BEST	Best fitting R-band luminosity	N/A	N/A	1
LUM_K_BEST	LUM_K_BEST	Best fitting K-band luminosity	N/A	N/A	1
hp_idx	HP_Idx	HEALPix index of the source position at order 13 using the nested scheme.	N/A	pos.healpix	30

VOResource XML (that's something exclusively for VO nerds)

Metadata

Identifier

Cite this

Description

Keywords

Creator

Created

Data updated

Source

Reference URL