Table information for 'gps1.main'

General

Table Description: GPS1 main table with some deviations from the published paper. In particular note that Gaia and Pan-STARRS1 photometry results from blind crossmatching; see d_g and d_ps1 fields for the offsets in the respective crossmatches.

This table is available for ADQL queries and through the TAP endpoint.

Resource Description:

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 table's resource, see Information on resource 'The Gaia-PS1-SDSS (GPS1) Proper Motion Catalog'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2017ApJS..232....4T (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:gps1_main,
  year=2017,
  title={The Gaia-PS1-{SDSS} ({GPS1}) Proper Motion Catalog},
  author={Tian, H.-J. and Gupta, P. and Sesar, B. and Rix, H.-W. and Liu, C. and Goldman, B. and Platais, I. and Kudritzki, R-P. and Waters, C.Z.},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/gps1.main},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
obj_id ID Unique object identifier (this is not the Pan-STARRS1 identifier). N/A meta.id;meta.main
ra RA Right Ascension from fit (ICRS, Epoch J2010). [Note p] deg pos.eq.ra;meta.main
dec Dec Declination from fit (ICRS, Epoch J2010). [Note p] deg pos.eq.dec;meta.main
e_ra Err. RA Error in Right Ascension from Gaia DR1. [Note p] deg stat.error;pos.eq.ra;meta.main
e_dec Err. Dec Error in Declination from Gaia DR1. [Note p] deg stat.error;pos.eq.dec;meta.main
ra_ps1 RA_PS1 Right Ascension from Pan-STARRS1 deg pos.eq.ra
dec_ps1 Dec_PS1 Declination from Pan-STARRS1 deg pos.eq.dec
pmra PM α Proper motion in RA with cos(δ) applied; robust fit. deg/yr pos.pm;pos.eq.ra
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
pmde PM δ Proper motion in Declination; robust fit. deg/yr pos.pm;pos.eq.dec
e_pmde Err. PM δ Error of proper motion in Declination; robust fit. deg/yr stat.error;pos.pm;pos.eq.dec
pmra_x PM α_x Proper motion in RA with cos(δ) applied; x-validation fit. deg/yr 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
pmde_x PM δ_x Proper motion in Declination; x-validation fit. deg/yr 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
pmra_ng PM α_ng Proper motion in RA with cos(δ) applied; fit without Gaia. deg/yr 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
pmde_ng PM δ_ng Proper motion in Declination; fit without Gaia. deg/yr 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
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
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
pmde_ps PM δ_ps Proper motion in Declination; fit with only Pan-STARRS. deg/yr 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
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
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
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
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
magg mag g g-band PSF magnitude from Pan-STARRS1 DR1 [Note c] mag phot.mag;em.opt.V
e_magg E. mag g Error in g-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.V
magr mag r r-band PSF magnitude from Pan-STARRS1 DR1 [Note c] mag phot.mag;em.opt.R
e_magr E. mag r Error in r-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.R
magi mag i i-band PSF magnitude from Pan-STARRS1 DR1 [Note c] mag phot.mag;em.opt.I
e_magi E. mag i Error in i-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.I
magz mag z z-band PSF magnitude from Pan-STARRS1 DR1 [Note c] mag 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
magy mag y y-band PSF magnitude from Pan-STARRS1 DR1 [Note c] mag phot.mag;em.opt.I
e_magy E. mag y Error in y-band PSF magnitude from Pan-STARRS1 DR1 mag stat.error;phot.mag;em.opt.I
magj mag J J-band magnitude from 2MASS [Note c] mag phot.mag;em.ir.J
e_magj E. mag J Error in J-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.J
magh mag H H-band magnitude from 2MASS [Note c] mag phot.mag;em.ir.H
e_magh E. mag H Error in H-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.H
magk mag K K_s-band magnitude from 2MASS [Note c] mag phot.mag;em.ir.K
e_magk E. mag K Error in K_s-band magnitude from 2MASS mag stat.error;phot.mag;em.ir.K
maggaia mag G G-band magnitude from Gaia [Note c] mag 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
n_obsps1 N(PS1) Number of PS1 SeasonAVG detections. N/A meta.number;obs
n_obs N_obs number of all the detections. N/A meta.number;obs
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
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
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

Columns that are parts of indices are marked like this.

Other

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VOResource

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Notes