Data Model: table_A2

General Description
This table provides the astrometric parameters of the UCDs and UCD candidates and their companions for comoving systems from Table A.1.
Naming Convention
This file corresponds to Table A.2 in the eROPub138 splash paper: A first eROSITA view of ultracool dwarfs (Stelzer+ 2021).
Filename: table_A2.fits
Approximate Size
16 KB
File Type
FITS
Generated by Product
eSASS (software used to generate the date product, add links)

Sections

Content of the page.

HDU0: PRIMARY

[Write text to summarize contents of this HDU]

HDU Type
IMAGE
HDU Size
3 KB
Header Table Caption for HDU0
KeyValueTypeComment

HDU1: Joined

Astrometric parameters for the 14 common proper-motion pairs.

HDU Type
BINARY TABLE
HDU Size
1008 bytes
Header Table Caption for HDU1
KeyValueTypeComment
Binary Table Caption for HDU1
NameTypeUnitDescription
source_id_ucd int64 None Gaia DR2 designation of the UCD
pmra_ucd float64 mas/yr Proper motion in right ascension direction for the UCD
pmdec_ucd float64 mas/yr Proper motion in declination direction for the UCD
source_id int64 None Gaia DR2 designation of the alternative counterpart
pmra float64 mas/yr Proper motion in right ascension direction for the alternative counterpart
pmdec float64 mas/yr Proper motion in declination direction for the alternative counterpart
dist float64 pc Distance estimated by Bailer-Jones et al. (2018) for the alternative counterpart
elo_dist float64 pc Lower error on the distance estimated by Bailer-Jones et al. (2018)
eup_dist float64 pc Upper error on the distance estimated by Bailer-Jones et al. (2018)

References

Gaia Collaboration, Brown et al. 2018. Gaia Data Release 2. Summary of the contents and survey properties (Vizier catalog: I/345)

Bailer-Jones et al. 2018. Estimating Distance from Parallaxes. IV. Distances to 1.33 Billion Stars in Gaia Data Release 2 (Vizier catalog: I/347)

Acknowledgement

The eROSITA data model structure for catalogues was branched from the SDSS data model for value added catalogues.