Table information for 'gcns.main'

General

Table Description: This is the main catalogue. Additional resources include: gcns.resolvedss (resolved stellar systems), gcns.missing_10mas (objects missing from eDR3 that have been suspected of being within 100 pc before), and gcns.hyacob (probable members of the Hyades and the Coma Berenices open cluster).

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

Resource Description:

This is a clean and well characterised catalogue of objects within 100pc of the Sun from the Gaia early third data release. We characterise the catalogue using the full data release, and comparisons to other catalogues in literature and simulations. For all candidates (measured parallax < 8 mas), we calculate a distance probability function using Bayesian procedures and mock catalogues for the prediction of the priors. For each entry using a random forest classifier we attempt to remove sources with spurious astrometric solutions.

This results in 331312 objects that should contain at least 92% of stars within 100 pc at spectral type M9.

GCNS comes with several auxiliary tables, in particular lists of resolved stellar systems, of known neary stars not found in eDR3 and of candidates of Hyades and ComaBer cluster members.

For a list of all services and tables belonging to this table's resource, see Information on resource 'The Gaia eDR3 Catalogue of Nearby Stars GCNS'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference https://doi.org/10.1051/0004-6361/202039498 either in addition to or instead of the service reference.

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

@MISC{vo:gcns_main,
  year=2021,
  title={eDR3 Gaia Catalogue of Nearby Stars ({GCNS})},
  author={Smart, R.L. and Sarro, L.M. and Rybizki, J. and Reylé, C. and Robin, A.C. and Hambly, N.C. and Abbas, U. and Barstow, M.A. and de Bruijne, J.H.J. and Bucciarelli, B. and Carrasco, J.M. and Cooper, W.J. and Hodgkin, S.T. and Masana, E. and Michalik, D. and Sahlmann, J. and Sozzetti, A. and Gaia Collaboration},
  url={https://dc.zah.uni-heidelberg.de/tableinfo/gcns.main},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Columns

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
source_id Source Id Gaia eDR3 unique source identifier. Note that this *cannot* be matched against the DR1 or DR2 source_ids. [Note id] N/A meta.id;meta.main
ra RA ICRS right ascension from Gaia eDR3. deg pos.eq.ra;meta.main
dec Dec ICRS declination from Gaia eDR3. deg pos.eq.dec;meta.main
ra_error Err. RA Standard error of ra (with cos δ applied). mas stat.error;pos.eq.ra
dec_error Err. Dec Standard error of dec mas stat.error;pos.eq.dec
parallax Parallax Absolute barycentric stellar parallax of the source at the reference epoch J2016.0. If looking for a distance, consider joining with gedr3dist.main and using the distances from there. mas pos.parallax
parallax_error Parallax_error Standard error of parallax mas stat.error;pos.parallax
pmra µ(RA) Proper motion in right ascension of the source in ICRS at J2016.0. This is the tangent plane projection of the proper motion vector in the direction of increasing right ascension. mas/yr pos.pm;pos.eq.ra
pmra_error Err. PM(RA) Standard error of pmra mas/yr stat.error;pos.pm;pos.eq.ra
pmdec µ(Dec) Proper motion in declination at J2016.0. mas/yr pos.pm;pos.eq.dec
pmdec_error Err. PM(Dec) Standard error of pmdec mas/yr stat.error;pos.pm;pos.eq.dec
phot_g_mean_mag m_G Mean magnitude in the G band. This is computed from the G-band mean flux applying the magnitude zero-point in the Vega scale. To obtain error estimates, see phot_g_mean_flux_over_error. mag phot.mag;em.opt;stat.mean
phot_g_mean_flux_over_error SNR G Integrated mean G flux divided by its error. Errors are computed from the dispersion about the weighted mean of the input calibrated photometry. [Note e] s**-1 stat.snr;phot.flux;em.opt;stat.mean
phot_bp_mean_mag Mag BP Mean magnitude in the integrated BP band. This is computed from the BP-band mean flux applying the magnitude zero-point in the Vega scale. To obtain error estimates, see phot_bp_mean_flux_over_error. mag phot.mag;em.opt.B
phot_bp_mean_flux_over_error SNR BP Integrated mean BP flux divided by its error. Errors are computed from the dispersion about the weighted mean of the input calibrated photometry. [Note e] N/A stat.snr;phot.flux;em.opt.B
phot_rp_mean_mag Mag RP Mean magnitude in the integrated RP band. This is computed from the RP-band mean flux applying the magnitude zero-point in the Vega scale. To obtain error estimates, see phot_rp_mean_flux_over_error. mag phot.mag;em.opt.R
phot_rp_mean_flux_over_error SNR RP Integrated mean RP flux divided by its error. Errors are computed from the dispersion about the weighted mean of the input calibrated photometry. [Note e] N/A stat.snr;phot.flux;em.opt.R
phot_bp_rp_excess_factor BP/RP excess BP/RP excess factor estimated from the comparison of the sum of integrated BP and RP fluxes with respect to the flux in the G band. This measures the excess of flux in the BP and RP integrated photometry with respect to the G band. This excess is believed to be caused by background and contamination issues affecting the BP and RP data. Therefore a large value of this factor for a given source indicates systematic errors in the BP and RP photometry. N/A stat.fit.goodness
ruwe RUWE Renormalized Unit Weight Error; this is a revised measure for the overall consistency of the solution as defined by GAIA-C3-TN-LU-LL-124-01. A suggested cut on this is RUWE <1.40) See the note for details. [Note ruwe] N/A stat.weight
ipd_frac_multi_peak Double? Percentage of distance windows in which a double peak was seen (high values mean high likelihood of a resolved double star). N/A meta.code.multip
adoptedrv ad. RV Adopted Radial Velocity km/s phys.veloc;pos.heliocentric
adoptedrv_error Err. RV Error in adopted RV km/s stat.error;phys.veloc;pos.heliocentric
adoptedrv_refname Src RV Bibcode for the source of the radial velocity N/A meta.bib.bibcode
radial_velocity_is_valid RV? 1 if this object has a radial velocity in eDR3, 0 otherwise N/A meta.code.qual
gcns_prob Astrom? Probability that the astrometry is reliable N/A stat.fit.goodness
wd_prob WD? probability that this is a white dwarf. N/A stat.likelihood;src.class
dist_1 Dist1 1st percentile of the distance PDF, used in GCNS selection kpc stat.value;pos.distance
dist_16 Dist16 16th percentile of the distance PDF (1 σ lower bound) kpc stat.value;pos.distance
dist_50 Dist50 Median of the distance PDF kpc stat.median;pos.distance
dist_84 Dist84 84th percentile of the distance PDF (1 σ upper bound) kpc stat.value;pos.distance
xcoord_50 X Median x coordinate in the Galactic frame assuming dist_50 pc stat.median;pos.cartesian.x
xcoord_16 Lo X 1 σ lower bound of Galactic frame x coordinate pc stat.value;pos.cartesian.x
xcoord_84 Hi X 1 σ upper bound of Galactic frame x coordinate pc stat.value;pos.cartesian.x
ycoord_50 Y Median y coordinate in the Galactic frame assuming dist_50 pc stat.median;pos.cartesian.y
ycoord_16 Lo Y 1 σ lower bound of Galactic frame y coordinate pc stat.value;pos.cartesian.y
ycoord_84 Hi Y 1 σ upper bound of Galactic frame y coordinate pc stat.value;pos.cartesian.y
zcoord_50 Z Median z coordinate in the Galactic frame assuming dist_50 pc stat.median;pos.cartesian.z
zcoord_16 Lo Z 1 σ lower bound of Galactic frame z coordinate pc stat.value;pos.cartesian.z
zcoord_84 Hi Z 1 σ upper bound of Galactic frame z coordinate pc stat.value;pos.cartesian.z
uvel_50 U Median velocity u in the Galactic frame, direction positive x km/s stat.median;phys.veloc;pos.cartesian.x
uvel_16 Lo U 1 σ lower bound for u km/s stat.value;phys.veloc;pos.cartesian.x
uvel_84 Hi U 1 σ upper bound for u km/s stat.value;phys.veloc;pos.cartesian.x
vvel_50 V Median velocity v in the Galactic frame, direction positive y km/s stat.median;phys.veloc;pos.cartesian.y
vvel_16 Lo V 1 σ lower bound for v km/s stat.value;phys.veloc;pos.cartesian.y
vvel_84 Hi V 1 σ upper bound for v km/s stat.value;phys.veloc;pos.cartesian.y
wvel_50 W Median velocity w in the Galactic frame, direction positive z km/s stat.median;phys.veloc;pos.cartesian.z
wvel_16 Lo W 1 σ lower bound for w km/s stat.value;phys.veloc;pos.cartesian.z
wvel_84 Hi W 1 σ upper bound for w km/s stat.value;phys.veloc;pos.cartesian.z
name_gunn Gunn Name Object Name from PanSTARRS/SDSS/SkyMapper survey N/A meta.id.cross
refname_gunn Ref. griz Reference for the source of the Gunn photometry N/A meta.bib.bibcode
gmag_gunn m_g Gunn G band magnitude (when from SDSS, g, when from Skymapper, g_psf) mag phot.mat;em.opt.V
e_gmag_gunn Err. m_g Uncertainty in G band magnitude mag stat.error;phot.mat;em.opt.V
rmag_gunn m_r Gunn R band magnitude (when from SDSS, g, when from Skymapper, g_psf) mag phot.mat;em.opt.R
e_rmag_gunn Err. m_r Uncertainty in R band magnitude mag stat.error;phot.mat;em.opt.R
imag_gunn m_i Gunn I band magnitude (when from SDSS, g, when from Skymapper, g_psf) mag phot.mat;em.opt.I
e_imag_gunn Err. m_i Uncertainty in I band magnitude mag stat.error;phot.mat;em.opt.I
zmag_gunn m_z Gunn Z band magnitude (when from SDSS, g, when from Skymapper, g_psf) mag phot.mat;em.opt.I
e_zmag_gunn Err. m_z Uncertainty in Z band magnitude mag stat.error;phot.mat;em.opt.I
name_2mass 2MASS name Name of this object in 2MASS N/A meta.id.cross
j_m_2mass m_J 2MASS J band magnitude mag phot.mag;em.IR.J
j_msig_2mass Err. m_J Uncertainty in 2MASS J band magnitude mag stat.error;phot.mag;em.IR.J
h_m_2mass m_H 2MASS H band magnitude mag phot.mag;em.IR.H
h_msig_2mass Err. m_H Uncertainty in 2MASS H band magnitude mag stat.error;phot.mag;em.IR.H
k_m_2mass m_K 2MASS K band magnitude mag phot.mag;em.IR.K
k_msig_2mass Err. m_K Uncertainty in 2MASS K band magnitude mag stat.error;phot.mag;em.IR.K
name_wise WISE name Name of this object in WISE N/A meta.id.cross
w1mpro_pm_wise m_W1 CATWISE W1 band magnitude mag phot.mag;em.IR.3-4um
w1sigmpro_pm_wise Err. m_W1 Uncertainty in CATWISE W1 band magnitude mag stat.error;phot.mag;em.IR.3-4um
w2mpro_pm_wise m_W2 CATWISE W2 band magnitude mag phot.mag;em.IR.4-8um
w2sigmpro_pm_wise Err. m_W2 Uncertainty in CATWISE W2 band magnitude mag stat.error;phot.mag;em.IR.4-8um
w3mpro_wise m_W3 CATWISE W3 band magnitude mag phot.mag;em.IR.8-15um
w3sigmpro_wise Err. m_W3 Uncertainty in CATWISE W3 band magnitude mag stat.error;phot.mag;em.IR.8-15um
w4mpro_wise m_W4 ALLWISE W4 band magnitude mag phot.mag;em.IR.15-30um
w4sigmpro_wise Err. m_W4 Uncertainty in ALLWISE W4 band magnitude mag stat.error;phot.mag;em.IR.15-30um

Columns that are parts of indices are marked like this.

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