Table information for 'gcns.maglims7'

General

Table Description: The G magnitude distribution percentiles per level 7 HEALpixes for all Gaia sources with a parallax and a G magnitude measurement. Can be used to approximate the G magnitude limit for Gaia at that position of the sky. Sources up to a limiting magnitude equal to 'magnitude_70' are 98% complete when compared to PS1. The 80th and 90th percentile decrease the completeness in Gaia to 97% and 95%, respectively. These cuts can be very useful, when trying to compare Gaia data to models, e.g. the GeDR3mock catalog (gedrmock.main).

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_maglims7,
  year=2021,
  title={Magnitude distribution over 7-{HEALPixes}},
  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.maglims7},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Columns

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NameTable Head DescriptionUnitUCD
hpx 7-HEALPix HEALPix on level 7 these statistics are for N/A pos.healpix
magnitude_70 70th percentile 70th percentle of the G-magnitude distribution in Gaia eDR3 for all objects with both parallax and a G magnitude mag stat.param
magnitude_80 80th percentile 80th percentle of the G-magnitude distribution in Gaia eDR3 for all objects with both parallax and a G magnitude mag stat.param
magnitude_90 90th percentile 90th percentle of the G-magnitude distribution in Gaia eDR3 for all objects with both parallax and a G magnitude mag stat.param
sourcecount # Objs Number of objects contributing to the distribution N/A meta.number

Columns that are parts of indices are marked like this.

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