Information on Service 'Stripe 82 Photometric Redshifts from SDSS Coadditions'

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This survey gives photometric redshifts of objects within 275 deg² (−50◦ < α < 60◦ and −1.◦25 < δ < +1.◦25) centered on the Celestial Equator. Each piece of sky has ∼20 runs of repeated scanning by the SDSS camera contributing and thus reaches ∼2 mag fainter than the SDSS single pass data, i.e., to r ∼ 23.5 for galaxies.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Stripe 82 Photometric Redshifts from SDSS Coadditions'

Overview

You can access this service using:

This service is published as follows:

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):

NameTable Head DescriptionUnitUCD
DEC Delta (ICRS) Declination (ICRS decimal) deg pos.eq.dec
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
MAXREC Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
objID Objid Unique SDSS identifier. N/A meta.id;meta.main
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
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
zphot Zphot Photometric redshift from SDSS' PHOTO pipeline 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.

NameTable Head DescriptionUnitUCD
_r Dist. Distance to cone center deg pos.distance
camcol Col. Camera column Note s N/A meta.id;instr
dej2000 Dej2000 Declination of the object. deg pos.eq.dec;meta.main
fieldId Field Field number Note s N/A meta.id;obs.field
obj Ob. Id The object id within a field. Usually changes between reruns of the same field. Note s N/A meta.id
objID Objid Unique SDSS identifier. N/A meta.id;meta.main
raj2000 Raj2000 Right ascension of the object. deg pos.eq.ra;meta.main
rerun Rerun Rerun number Note s N/A meta.id;obs
run Run Run number Note s N/A meta.id;obs
zphot Zphot Photometric redshift from SDSS' PHOTO pipeline N/A N/A
zphoterr Zphoterr Error in the photometric redshift from SDSS' PHOTO pipeline 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.

NameTable Head DescriptionUnitUCD Verb. Level
objID Objid Unique SDSS identifier. N/A meta.id;meta.main 1
raj2000 Raj2000 Right ascension of the object. deg pos.eq.ra;meta.main 1
dej2000 Dej2000 Declination of the object. deg pos.eq.dec;meta.main 1
zphot Zphot Photometric redshift from SDSS' PHOTO pipeline N/A N/A 1
zphoterr Zphoterr Error in the photometric redshift from SDSS' PHOTO pipeline N/A N/A 1
_r Dist. Distance to cone center deg pos.distance 10
run Run Run number Note s N/A meta.id;obs 20
rerun Rerun Rerun number Note s N/A meta.id;obs 20
camcol Col. Camera column Note s N/A meta.id;instr 20
fieldId Field Field number Note s N/A meta.id;obs.field 20
obj Ob. Id The object id within a field. Usually changes between reruns of the same field. Note s N/A meta.id 20

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

Note s

More information on SDSS-specific terms can be found in 2002AJ....123..485S. Coadd run numbers are artificial.