Data Model: table_C1

General Description
This table reports the multi-wavelength properties of non-UCDs considered more plausible counterparts to eRASS1 sources than the UCD in its vicinity.
Naming Convention
This file corresponds to Table C.1 in the eROPub138 splash paper: A first eROSITA view of ultracool dwarfs (Stelzer+ 2021).
Filename: table_C1.fits
Approximate Size
22 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
4 KB
Header Table Caption for HDU0
KeyValueTypeComment

HDU1: Joined

Data for the 27 non-UCDs considered more plausible counterparts to eRASS1 sources.

HDU Type
BINARY TABLE
HDU Size
3 KB
Header Table Caption for HDU1
KeyValueTypeComment
Binary Table Caption for HDU1
NameTypeUnitDescription
source_id_ucd int64 None Gaia DR2 designation of the UCD
source_id_counterpart int64 None Gaia DR2 designation of the alternative counterpart
other_name char[21] None Main SIMBAD designation of the alternative counterpart
Gmag float32 mag G-band magnitude from the Gaia DR2 catalog
Jmag float64 mag J-band magnitude from the 2MASS All-Sky PSC catalog
W1mag float64 mag W1-band magnitude from the AllWISE catalog
spt char[8] None Spectral type of the alternative counterpart derived from the G-J color index [note1]
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)
ML_FLUX_2 float32 erg/cm2/s X-ray flux in the eROSITA Band 2
ML_FLUX_ERR_2 float32 erg/cm2/s Error on X-ray flux in the eROSITA Band 2
ML_FLUX_3 float32 erg/cm2/s X-ray flux in the eROSITA Band 3
ML_FLUX_ERR_3 float32 erg/cm2/s Error on X-ray flux in the eROSITA Band 3
object_type char[6] None Object type of the alternative counterpart
reference char[4] None Reference for the object type

[note1] We make use of the "Stellar Color/Teff Table" maintained by E. Mamajek.

References for the object type

[1] Schneider et al. 2007. The Sloan Digital Sky Survey Quasar Catalog. IV. Fifth Data Release (Vizier catalog: VII/260)

[2] Vasconcellos et al. 2011. Decision Tree Classifiers for Star/Galaxy Separation (Vizier catalog: J/AJ/141/189)

[3] Saito et al. 2012. VVV DR1: The first data release of the Milky Way bulge and southern plane from the near-infrared ESO public survey VISTA variables in the Vía Láctea
a. Vizier catalog: II/337 (DR1 ; Saito et al. 2012)
b. Vizier catalog: II/348 (DR2 ; Minniti et al. 2017)

[4] McMahon et al. 2013. First Scientific Results from the VISTA Hemisphere Survey (VHS) (Vizier catalog: McMahon et al. 2021. DR5 catalog : II/367)

[5] Secrest et al. 2015. Identification of 1.4 Million Active Galactic Nuclei in the Mid-Infrared using WISE Data (Vizier catalog: J/ApJS/221/12)

[6] Cook et al. 2016. A method for selecting M dwarfs with an increased likelihood of unresolved ultracool companionship (Vizier catalog: J/MNRAS/457/2192)

[7] Stevens et al. 2017. Empirical Bolometric Fluxes and Angular Diameters of 1.6 Million Tycho-2 Stars and Radii of 350,000 Stars with Gaia DR1 Parallaxes (Vizier catalog: J/AJ/154/259)

[8] Assef et al. 2018. The WISE AGN Catalog (Vizier catalog: J/ApJS/234/23)

[9] Cantat-Gaudin et al. 2018. Characterising open clusters in the solar neighbourhood with the Tycho-Gaia Astrometric Solution (Vizier catalog: J/A+A/615/A49)

[10] Xiang et al. 2019. Abundance Estimates for 16 Elements in 6 Million Stars from LAMOST DR5 Low-Resolution Spectra (Vizier catalog: J/ApJS/245/34)

[11] This work based on the Gaia DR2 catalog

References

Skrutskie et al. 2006. The Two Micron All Sky Survey (2MASS) (Vizier catalog: II/246)

Wright et al. 2010. The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance (Vizier catalog: II/328)

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)

Predehl et al. 2020. The eROSITA X-ray telescope on SRG

Acknowledgement

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