Table information for 'gedr3mock.maglim_5'

General

Table Description:

This table gives empirical magnitude limits for G and BP bands derived from Gaia DR2 with G < 20.7 mag for HEALPixels of 5 (scale roughly ~2 degrees). For each band we have 4 different variants:

  1. no additional condition,
  2. parallax available,
  3. BP-RP available,
  4. parallax and BP-RP available.

For BP mag limits we also require that BP is available. The magnitude limits are approximated by the mode of the magnitude distribution in a specific HEALpix. Since this mode estimator is prone to Poisson noise in low density areas we report the magnitude limits in two flavours:

  1. directly the mode estimator
  2. the same as the mode estimator,

except that in healpixel with a stellar density below 1e5 sources per square degree the limit is arbitrarily set to 20.7 mag. These magnitude limits were created using the gdr2_completeness package and users are encouraged to create custom-made magnitude limits with specific conditions, e.g. RVS sample with good parallaxes.

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

Resource Description: This catalogue is a simulation of the Gaia EDR3 stellar content using Galaxia (a tool to sample stars from a Besancon-like Milky Way model), 3d dust extinction maps and the latest PARSEC Isochrones. It is mimicking the Gaia DR2 data model and an apparent magnitude limit of G=20,7. Extinctions and photometry in different bands have also been included in a supplementary table as well as uncertainty estimates using scaled GDR2 errors. Additional magnitude limit per HEALpix maps are provided, based on the mode in the magnitude distribution of Gaia DR2 data.

For a list of all services and tables belonging to this table's resource, see Information on resource 'Gaia early DR3 Mock Catalogue (gedr3mock)'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2020arXiv200409991R (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:gedr3mock_maglim_5,
  year=2019,
  title={Gaia early DR3 Mock Catalogue (gedr3mock)},
  author={Rybizki, J. and Demleitner, M. and Bailer-Jones, C. and Dal Tio, P. and Cantat-Gaudin, T. and Fouesneau, M. and Chen, Y. and Andrae, R. and Girardi, L. and Sharma, S.},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/gedr3mock.maglim_5},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
hpx HEALPix Level 5 HEALPix for which the magnitude limit applies. N/A pos.healpix
maglim_g Mode G The mode of the G magnitude distribution in the respective HEALPix mag instr.sensitivity
starcount_g #Stars The number of stars in the respective HEALPix bin with G<20.7 N/A meta.number
maglim_g_density_threshold Mode G HD The mode of the G magnitude distribution in the respective HEALPix. In HEALPixes with less than 1e5 stars per square degree the limit is set to 20.7 mag. This should reduce the noise of the mode estimator due to Poisson noise in low density areas. mag instr.sensitivity
maglim_g_parallax Mode G The mode of the G magnitude distribution in the respective HEALPix when also requiring a parallax measurement mag instr.sensitivity
starcount_g_parallax #Stars The number of stars in the respective HEALPix bin with G<20.7 and parallax measurement N/A meta.number
maglim_g_parallax_density_threshold Mode G HD The mode of the G magnitude distribution in the respective HEALPix when also requiring a parallax measurement. In HEALPixes with less than 1e5 stars per square degree the limit is set to 20.7 mag. This should reduce the noise of the mode estimator due to Poisson noise in low density areas. mag instr.sensitivity
maglim_g_color Mode G The mode of the G magnitude distribution in the respective HEALPix when also requiring a BP and RP measurement mag instr.sensitivity
starcount_g_color #Stars The number of stars in the respective HEALPix bin with G<20.7 and BP and RP measurement N/A meta.number
maglim_g_color_density_threshold Mode G HD The mode of the G magnitude distribution in the respective HEALPix when also requiring a BP and RP measurement. In HEALPixes with less than 1e5 stars per square degree the limit is set to 20.7 mag. This should reduce the noise of the mode estimator due to Poisson noise in low density areas. mag instr.sensitivity
maglim_g_parallax_color Mode G The mode of the G magnitude distribution in the respective HEALPix when also requiring a parallax and BP and RP measurement mag instr.sensitivity
starcount_g_parallax_color #Stars The number of stars in the respective HEALPix bin with G<20.7 and parallax and BP and RP measurement N/A meta.number
maglim_g_parallax_color_density_threshold Mode G HD The mode of the G magnitude distribution in the respective HEALPix when also requiring a parallax and BP and RP measurement. In HEALPixes with less than 1e5 stars per square degree the limit is set to 20.7 mag. This should reduce the noise of the mode estimator due to Poisson noise in low density areas. mag instr.sensitivity
maglim_bp Mode BP The mode of the BP magnitude distribution in the respective HEALPix mag instr.sensitivity
starcount_bp #Stars The number of stars in the respective HEALPix bin with G<20.7 N/A meta.number
maglim_bp_density_threshold Mode BP HD The mode of the BP magnitude distribution in the respective HEALPix. In HEALPixes with less than 1e5 stars per square degree the limit is set to 20.7 mag. This should reduce the noise of the mode estimator due to Poisson noise in low density areas. mag instr.sensitivity
maglim_bp_parallax Mode BP The mode of the BP magnitude distribution in the respective HEALPix when also requiring a parallax measurement mag instr.sensitivity
starcount_bp_parallax #Stars The number of stars in the respective HEALPix bin with G<20.7 and parallax measurement N/A meta.number
maglim_bp_parallax_density_threshold Mode BP HD The mode of the BP magnitude distribution in the respective HEALPix when also requiring a parallax measurement. In HEALPixes with less than 1e5 stars per square degree the limit is set to 20.7 mag. This should reduce the noise of the mode estimator due to Poisson noise in low density areas. mag instr.sensitivity
maglim_bp_color Mode BP The mode of the BP magnitude distribution in the respective HEALPix when also requiring a BP and RP measurement mag instr.sensitivity
starcount_bp_color #Stars The number of stars in the respective HEALPix bin with G<20.7 and BP and RP measurement N/A meta.number
maglim_bp_color_density_threshold Mode BP HD The mode of the BP magnitude distribution in the respective HEALPix when also requiring a BP and RP measurement. In HEALPixes with less than 1e5 stars per square degree the limit is set to 20.7 mag. This should reduce the noise of the mode estimator due to Poisson noise in low density areas. mag instr.sensitivity
maglim_bp_parallax_color Mode BP The mode of the BP magnitude distribution in the respective HEALPix when also requiring a parallax and BP and RP measurement mag instr.sensitivity
starcount_bp_parallax_color #Stars The number of stars in the respective HEALPix bin with G<20.7 and parallax and BP and RP measurement N/A meta.number
maglim_bp_parallax_color_density_threshold Mode BP HD The mode of the BP magnitude distribution in the respective HEALPix when also requiring a parallax and BP and RP measurement. In HEALPixes with less than 1e5 stars per square degree the limit is set to 20.7 mag. This should reduce the noise of the mode estimator due to Poisson noise in low density areas. mag instr.sensitivity

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