non-single-star (NSS) astrometric models which proper motion is compatible with an acceleration solution (gaiadr3.nss_acceleration_astro)

The table has 338215 rows, 29 columns.

Description

This table contains non-single-star astrometric models for sources having a non-linear proper motion which is compatible with an acceleration solution. Several possible models are hosted within the same table and they are indicated by the field nss_solution_type. The description of this latter lists all possible solution types considered for this release. Only a selection of parameters hosted in this table are provided here, depending on the solution. The details of those is given in the description of field bit_index, which can also be used to extract the relevant elements of the correlation vector corr_vec.Details about the formalism used to derive the parameters in this table are given in the on-line documentation, see Chapter cu4nss.

Attribution

If you have used Gaia data in your research, please use the following acknowledgement:

This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.

More information can be found on the credit and citation instructions page.

Columns

Name Type UCD Unit Description
solution_id long meta.version Solution Identifier
source_id long meta.id
meta.main
meta.ref
Source Identifier
nss_solution_type char meta.record NSS model adopted
ra double pos.eq.ra
meta.main
deg Right ascension
ra_error float stat.error
pos.eq.ra
mas Standard error of right ascension
dec double pos.eq.dec
meta.main
deg Declination
dec_error float stat.error
pos.eq.dec
mas Standard error of declination
parallax double pos.parallax mas Parallax
parallax_error float stat.error
pos.parallax
mas Standard error of parallax
pmra double pos.pm
pos.eq.ra
mas.yr**-1 Proper motion in right ascension direction
pmra_error float stat.error
pos.pm
pos.eq.ra
mas.yr**-1 Standard error of proper motion in right ascension direction
pmdec double pos.pm
pos.eq.dec
mas.yr**-1 Proper motion in declination direction
pmdec_error float stat.error
pos.pm
pos.eq.dec
mas.yr**-1 Standard error of proper motion in declination direction
accel_ra double phys.acceleration mas.yr**-2 Acceleration in RA
accel_ra_error float stat.error
phys.acceleration
mas.yr**-2 Standard error of Acceleration in RA
accel_dec double phys.acceleration mas.yr**-2 Acceleration in DEC
accel_dec_error float stat.error
phys.acceleration
mas.yr**-2 Standard error of Acceleration in DEC
deriv_accel_ra double phys.acceleration mas.yr**-3 Time derivative of the accel. in RA
deriv_accel_ra_error float stat.error
phys.acceleration
mas.yr**-3 Standard error of Time derivative of the acceleration in RA
deriv_accel_dec double phys.acceleration mas.yr**-3 Time derivative of the accel. in DEC
deriv_accel_dec_error float stat.error
phys.acceleration
mas.yr**-3 Standard error of Time derivative of the acceleration in DEC
astrometric_n_obs_al integer meta.number Total astrometric CCD observations in AL considered
astrometric_n_good_obs_al integer meta.number Total astrometric CCD observations in AL actually used
bit_index long meta.code.status Boolean mask for the fields above in the corrVec matrix
corr_vec float[] stat.correlation Vector form of the upper triangle of the correlation matrix
obj_func float stat.fit.param Value of the objective function at the solution
goodness_of_fit float stat.fit.goodness Goodness of fit in the Hipparcos sense
significance float stat.fit.param The significance of the solution (i.e. how worth keeping a model is)
flags long meta.code.qual Quality flag for the achieved NSS solution