SVO archive of wide Gaia companions of the <br>candidate UCDs identified in JPLUS DR2

Documentation

Web access

The archive system implements a very simple search interface that permits queries by coordinates/radius and or range (*) of magnitudes. The default search radius is set to 5 arcsec. The user can also select the maximum number of sources to return (with values ranging from 10 to unlimited).

The result of the query is a HTML table with all the sources found in the archive fulfilling the search criteria. Detailed information on the output fields can be obtained placing the mouse over the question mark ("?") located close to the name of the column. Results can be sorted by just clicking on the name of the column. The archive implements the SAMP (Simple Application Messaging Protocol). SAMP allows applications to communicate with each other in a seamless and transparent way for the user. This way, the results of a query can be easily transferred to other VO applications by just clicking the "Send table to VO Apps" button.

(*) When a range is specified in a search the user must give both a minimum and maximum value for the corresponding quantity. If only a minimum value is given, all results with values larger than that will be obtained. If only a maximum value is given, all results with values smaller than that will be obtained.

Virtual Observatory access

The Virtual Observatory (VO) is an international initiative whose primary goal is to provide an efficient access and analysis of the information hosted in astronomical archives and services. Having a VO-compliant archive is an important added value for an astronomical project to guarantee the optimum scientific exploitation of their datasets.

Our archive system has been designed following the IVOA standards and requirements. In particular, it implements the Cone Search protocol, a standard defined for retrieving records from a catalogue of astronomical sources. The query made through the Cone Search service describes a sky position and an angular distance, defining a cone on the sky. The response returns a list of astronomical sources from the catalogue whose positions lie within the cone, formatted as a VOTable.

Frequently Asked Questions

How to make a query by magnitudes?

Click on "Clean".
Fill in the appropriate boxes in the "additional search fields".
Mark the "Don't use coordinates as search criterion" checkbox if you don't want to restrict by coordinates (or uncheck it otherwise).
Click on "Search"

Parameters contained in the detection catalogue

Parameter	Units	Description
RA (J2000)	deg	Right ascension (J2000) of our candidate UCD
DEC (J2000)	deg	Declination (J2000) of our candidate UCD
Parallax	mas	Gaia EDR3 parallax of our candidate UCD
Parallax_error	mas	Gaia EDR3 parallax error of our candidate UCD
pmRA	mas/yr	Gaia EDR3 proper motion in right ascension direction (pmRA*cosDE) of our candidate UCD
pmRA_error	mas/yr	Gaia EDR3 error for the proper motion in right ascension direction of our candidate UCD
pmDEC	mas/yr	Gaia EDR3 proper motion in declination direction of our candidate UCD
pmDEC_error	mas/yr	Gaia EDR3 error for the proper motion in declination direction of our candidate UCD
pm	mas/yr	Gaia EDR3 total proper motion of our candidate UCD
Gmag	mag	Gaia EDR3 G-band mean magnitude (Vega) of our candidate UCD
SpTy	-	Spectral type of our candidate UCD given in Simbad
RA_comp	deg	Right ascension (J2000) of the Gaia companion
DEC_comp	deg	Declination (J2000) of the Gaia companion
source_id	-	Gaia EDR3 identifier of the Gaia companion
parallax_comp	mas	Gaia EDR3 parallax of the Gaia companion
parallax_comp_error	mas	Gaia EDR3 parallax error of the Gaia companion
pmRA_comp	mas/yr	Gaia EDR3 proper motion in right ascension direction (pmRA*cosDE) of the Gaia companion
pmRA_comp_error	mas/yr	Gaia EDR3 error for the proper motion in right ascension direction of the Gaia companion
pmDEC_comp	mas/yr	Gaia EDR3 proper motion in declination direction of the Gaia companion
pmDEC_comp_error	mas/yr	Gaia EDR3 error for the proper motion in declination direction of the Gaia companion
pm_comp	mas/yr	Gaia EDR3 total proper motion of the Gaia companion
Gmag_comp	mag	Gaia EDR3 G-band mean magnitude (Vega) of the Gaia companion
SpTy_comp	-	Spectral type of the Gaia companion computed with the VOSA estimated effective temperature and Teff-Sptype relations presented in Pecaut & Mamajek (2013)
ang_dist	arcsec	Angular separation between our candidate UCD and the Gaia companion
phys_sep	AU	Projected physical separation between our candidate UCD and the Gaia companion
system	-	Multiple system type. B for binary system and T for tryple system