Information on Service 'The Gaia-PS1-SDSS (GPS1) Proper Motion Catalog'

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This catalog combines Gaia DR1, Pan-STARRS 1, SDSS and 2MASS astrometry to compute proper motions for 350 million sources across three-fourths of the sky down to a magnitude of mr≈20. Positions of galaxies from Pan-STARRS 1 are used to build a reference frame for PS1, SDSS, and 2MASS data. Gaia DR1 is adapted to that reference frame by exploiting that locally, proper motions are linear.

GPS1 has a characteristic systematic error of less than 0.3 mas/yr, and a typical precision of 1.5−2.0 mas/yr. The proper motions have been validated using galaxies, open clusters, distant giant stars and QSOs. In comparison with other published faint proper motion catalogs, GPS1's systematic error (<0.3 mas/yr) is about 10 times better than that of PPMXL and UCAC4 (>2.0 mas/yr). Similarly, its precision (~1.5 mas/yr) is an improvement by ∼ 4 times relative to PPMXL and UCAC4 (∼6.0 mas/yr). For QSOs, the precision of GPS1 is found to be worse (∼2.0−3.0 mas/yr), possibly due to their particular differential chromatic refraction (DCR).

For a list of all services and tables belonging to this service's resource, see Information on resource 'The Gaia-PS1-SDSS (GPS1) Proper Motion Catalog'

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
magr mag r r-band PSF magnitude from Pan-STARRS1 DR1 mag phot.mag;em.opt.R
MAXREC Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
obj_id ID Unique object identifier (this is not the Pan-STARRS1 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

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
chi2pmde χ² PM δ Reduced χ² for the robust fit of proper motion in Declination N/A stat.fit.chi2;pos.pm;pos.eq.dec
chi2pmde_ps χ² PM δ Reduced χ² for the Pan-STARRS 1-only fit of proper motion in Declination N/A stat.fit.chi2;pos.pm;pos.eq.dec
chi2pmra χ² PM α Reduced χ² for the robust fit of proper motion in RA N/A stat.fit.chi2;pos.pm;pos.eq.ra
chi2pmra_ps χ² PM α_ps Reduced χ² for the Pan-STARRS 1-only fit of proper motion in RA N/A stat.fit.chi2;pos.pm;pos.eq.ra
d_g d(G) Distance between position in GPS1 and the associated (closest) position in Gaia DR1 (not accounting for the epoch difference). arcsec arith.diff;pos.eq
d_ps1 d(PS1) Distance between position in GPS1 and the associated (closest) position in Pan-STARRS1 used for (not accounting for the epoch difference). arcsec arith.diff;pos.eq
dec Dec Declination from fit (ICRS, Epoch J2010). Note p deg pos.eq.dec;meta.main
dec_ps1 Dec_PS1 Declination from Pan-STARRS1 deg pos.eq.dec
e_dec Err. Dec Error in Declination from Gaia DR1. Note p deg stat.error;pos.eq.dec;meta.main
e_magg E. mag g Error in g-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.V
e_maggaia E. mag G Error in G-band magnitude from Gaia mag stat.error;phot.mag;em.opt.V
e_magh E. mag H Error in H-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.H
e_magi E. mag i Error in i-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.I
e_magj E. mag J Error in J-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.J
e_magk E. mag K Error in K_s-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.K
e_magr E. mag r Error in r-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.R
e_magy E. mag y Error in y-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.I
e_magz E. mag z Error in z-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.I
e_pmde Err. PM δ Error of proper motion in Declination; robust fit. deg/yr stat.error;pos.pm;pos.eq.dec
e_pmde_ng Err. PM δ_ng Error of proper motion in Declination; fit without Gaia. deg/yr stat.error;pos.pm;pos.eq.dec
e_pmde_ps Err. PM δ_ps Error of proper motion in Declination; fit with only Pan-STARRS. deg/yr stat.error;pos.pm;pos.eq.dec
e_pmde_x Err. PM δ_x Error of proper motion in Declination; x-validation fit. deg/yr stat.error;pos.pm;pos.eq.dec
e_pmra Err. PM α Error of proper motion in RA, cos(δ) applied; robust fit. deg/yr stat.error;pos.pm;pos.eq.ra
e_pmra_ng Err. PM α_ng Error of proper motion in RA, cos(δ) applied; fit without Gaia. deg/yr stat.error;pos.pm;pos.eq.ra
e_pmra_ps Err. PM α_ps Error of proper motion in RA, cos(δ) applied; fit with only Pan-STARRS. deg/yr stat.error;pos.pm;pos.eq.ra
e_pmra_x Err. PM α_x Error of proper motion in RA, cos(δ) applied; x-validation fit. deg/yr stat.error;pos.pm;pos.eq.ra
e_ra Err. RA Error in Right Ascension from Gaia DR1. Note p deg stat.error;pos.eq.ra;meta.main
magg mag g g-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.V
maggaia mag G G-band magnitude from Gaia Note c mag phot.mag;em.opt.V
magh mag H H-band magnitude from 2MASS Note c mag phot.mag;em.ir.H
magi mag i i-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.I
magj mag J J-band magnitude from 2MASS Note c mag phot.mag;em.ir.J
magk mag K K_s-band magnitude from 2MASS Note c mag phot.mag;em.ir.K
magr mag r r-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.R
magy mag y y-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.I
magz mag z z-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.I
n_obs N_obs number of all the detections. N/A meta.number;obs
n_obsps1 N(PS1) Number of PS1 SeasonAVG detections. N/A meta.number;obs
obj_id ID Unique object identifier (this is not the Pan-STARRS1 identifier). N/A meta.id;meta.main
pmde PM δ Proper motion in Declination; robust fit. deg/yr pos.pm;pos.eq.dec
pmde_ng PM δ_ng Proper motion in Declination; fit without Gaia. deg/yr pos.pm;pos.eq.dec
pmde_ps PM δ_ps Proper motion in Declination; fit with only Pan-STARRS. deg/yr pos.pm;pos.eq.dec
pmde_x PM δ_x Proper motion in Declination; x-validation fit. deg/yr pos.pm;pos.eq.dec
pmra PM α Proper motion in RA with cos(δ) applied; robust fit. deg/yr pos.pm;pos.eq.ra
pmra_ng PM α_ng Proper motion in RA with cos(δ) applied; fit without Gaia. deg/yr pos.pm;pos.eq.ra
pmra_ps PM α_ps Proper motion in RA with cos(δ) applied; fit with only Pan-STARRS. deg/yr pos.pm;pos.eq.ra
pmra_x PM α_x Proper motion in RA with cos(δ) applied; x-validation fit. deg/yr pos.pm;pos.eq.ra
ra RA Right Ascension from fit (ICRS, Epoch J2010). Note p deg pos.eq.ra;meta.main
ra_ps1 RA_PS1 Right Ascension from Pan-STARRS1 deg pos.eq.ra
surveys Sources Sum of source codes for the source catalogues that went into this row. Pan-STARRS is always present. Source codes: 5 -- 2MASS; 10 -- SDSS, 20 -- Gaia. N/A meta.code

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
obj_id ID Unique object identifier (this is not the Pan-STARRS1 identifier). N/A meta.id;meta.main 1
ra RA Right Ascension from fit (ICRS, Epoch J2010). Note p deg pos.eq.ra;meta.main 1
dec Dec Declination from fit (ICRS, Epoch J2010). Note p deg pos.eq.dec;meta.main 1
e_ra Err. RA Error in Right Ascension from Gaia DR1. Note p deg stat.error;pos.eq.ra;meta.main 1
e_dec Err. Dec Error in Declination from Gaia DR1. Note p deg stat.error;pos.eq.dec;meta.main 1
ra_ps1 RA_PS1 Right Ascension from Pan-STARRS1 deg pos.eq.ra 1
dec_ps1 Dec_PS1 Declination from Pan-STARRS1 deg pos.eq.dec 1
pmra PM α Proper motion in RA with cos(δ) applied; robust fit. deg/yr pos.pm;pos.eq.ra 5
pmde PM δ Proper motion in Declination; robust fit. deg/yr pos.pm;pos.eq.dec 5
magg mag g g-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.V 5
magr mag r r-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.R 5
magi mag i i-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.I 5
magz mag z z-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.I 5
magy mag y y-band PSF magnitude from Pan-STARRS1 DR1 Note c mag phot.mag;em.opt.I 5
magj mag J J-band magnitude from 2MASS Note c mag phot.mag;em.ir.J 5
magh mag H H-band magnitude from 2MASS Note c mag phot.mag;em.ir.H 5
magk mag K K_s-band magnitude from 2MASS Note c mag phot.mag;em.ir.K 5
maggaia mag G G-band magnitude from Gaia Note c mag phot.mag;em.opt.V 5
e_pmra Err. PM α Error of proper motion in RA, cos(δ) applied; robust fit. deg/yr stat.error;pos.pm;pos.eq.ra 15
e_pmde Err. PM δ Error of proper motion in Declination; robust fit. deg/yr stat.error;pos.pm;pos.eq.dec 15
pmra_x PM α_x Proper motion in RA with cos(δ) applied; x-validation fit. deg/yr pos.pm;pos.eq.ra 15
pmde_x PM δ_x Proper motion in Declination; x-validation fit. deg/yr pos.pm;pos.eq.dec 15
pmra_ng PM α_ng Proper motion in RA with cos(δ) applied; fit without Gaia. deg/yr pos.pm;pos.eq.ra 15
pmde_ng PM δ_ng Proper motion in Declination; fit without Gaia. deg/yr pos.pm;pos.eq.dec 15
pmra_ps PM α_ps Proper motion in RA with cos(δ) applied; fit with only Pan-STARRS. deg/yr pos.pm;pos.eq.ra 15
pmde_ps PM δ_ps Proper motion in Declination; fit with only Pan-STARRS. deg/yr pos.pm;pos.eq.dec 15
chi2pmra χ² PM α Reduced χ² for the robust fit of proper motion in RA N/A stat.fit.chi2;pos.pm;pos.eq.ra 15
chi2pmde χ² PM δ Reduced χ² for the robust fit of proper motion in Declination N/A stat.fit.chi2;pos.pm;pos.eq.dec 15
chi2pmde_ps χ² PM δ Reduced χ² for the Pan-STARRS 1-only fit of proper motion in Declination N/A stat.fit.chi2;pos.pm;pos.eq.dec 15
e_magg E. mag g Error in g-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.V 15
e_magr E. mag r Error in r-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.R 15
e_magi E. mag i Error in i-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.I 15
e_magz E. mag z Error in z-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.I 15
e_magy E. mag y Error in y-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.I 15
e_magj E. mag J Error in J-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.J 15
e_magh E. mag H Error in H-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.H 15
e_magk E. mag K Error in K_s-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.K 15
e_maggaia E. mag G Error in G-band magnitude from Gaia mag stat.error;phot.mag;em.opt.V 15
n_obs N_obs number of all the detections. N/A meta.number;obs 15
surveys Sources Sum of source codes for the source catalogues that went into this row. Pan-STARRS is always present. Source codes: 5 -- 2MASS; 10 -- SDSS, 20 -- Gaia. N/A meta.code 15
d_ps1 d(PS1) Distance between position in GPS1 and the associated (closest) position in Pan-STARRS1 used for (not accounting for the epoch difference). arcsec arith.diff;pos.eq 15
d_g d(G) Distance between position in GPS1 and the associated (closest) position in Gaia DR1 (not accounting for the epoch difference). arcsec arith.diff;pos.eq 15
e_pmra_x Err. PM α_x Error of proper motion in RA, cos(δ) applied; x-validation fit. deg/yr stat.error;pos.pm;pos.eq.ra 25
e_pmde_x Err. PM δ_x Error of proper motion in Declination; x-validation fit. deg/yr stat.error;pos.pm;pos.eq.dec 25
e_pmra_ng Err. PM α_ng Error of proper motion in RA, cos(δ) applied; fit without Gaia. deg/yr stat.error;pos.pm;pos.eq.ra 25
e_pmde_ng Err. PM δ_ng Error of proper motion in Declination; fit without Gaia. deg/yr stat.error;pos.pm;pos.eq.dec 25
e_pmra_ps Err. PM α_ps Error of proper motion in RA, cos(δ) applied; fit with only Pan-STARRS. deg/yr stat.error;pos.pm;pos.eq.ra 25
e_pmde_ps Err. PM δ_ps Error of proper motion in Declination; fit with only Pan-STARRS. deg/yr stat.error;pos.pm;pos.eq.dec 25
chi2pmra_ps χ² PM α_ps Reduced χ² for the Pan-STARRS 1-only fit of proper motion in RA N/A stat.fit.chi2;pos.pm;pos.eq.ra 25
n_obsps1 N(PS1) Number of PS1 SeasonAVG detections. N/A meta.number;obs 25

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

Note c

Pan-STARRS, 2MASS, and Gaia photometry was re-added to the objects via a blind crossmatch; it does not necessarily correspond to the photometry of the objects that were used to derive the astrometry, in particular in crowded fields.

Note p

The positions are SeasonAVGs from Pan-STARRS1 if unvailable from Gaia DR1. The errors are NULL in these cases.