User’s Guide

The database is divided into two main parts according to the location of symbiotic variables. You can select either galactic or extragalactic symbiotic stars. The data of symbiotic variables are presented in the form of tables, which can be explored directly through the web-portal or can be downloaded and used offline in different formats (see section Downloading the data). For all symbiotic binaries included in the database, we have prepared their object pages (see section Pages of the particular objects).

If you select particular galaxy, you can decide, if you would like to see all symbiotic stars in that galaxy, including the symbiotic candidates, or to explore only confirmed or suspected stars alone. This option is available by clicking on CONFIRMED or SUSPECTED buttons at the top of the page.

ALL CONFIRMED SUSPECTED

Tables with the data

Data tables in the database are structured in the same way as can be seen below. They are divided into seven tabs: Basic Data, Identifiers, Observations, Position, Orbit, Cool Component, and Hot Component. For a description of the data listed in the individual tabs, click on their name below. Tables in this part of the web-portal list different parameters of the systems. You can sort the rows in the tables by clicking on the column name,  change the number of displayed objects using the option show entries, search for particular objects or values in the tables using the search option and download the displayed data.

From every table, it is possible to access object pages covering all available information, references, and notes by clicking on object names. More information on object pages is listed in section Pages of the particular objects.

Note: Some columns on the tabs are hidden by default. These are denoted by * symbol in the description below. You can use the column visibility option to display these columns. 

Basic Data

On this tab, you can find the basic data for the objects in the selected galaxy or with selected status:

  • Star Name – the name of the object used in the catalog, for other identifiers, please see the tab “Identifiers”
  • Confirmed – the status of the symbiotic binary (confirmed as symbiotic binary or a symbiotic candidate)
  • Galaxy – galaxy to which the object belongs
  • α – the right ascension of the object, preferably from the Gaia DR2
  • δ – the declination of the object, preferably from the Gaia DR2
  • – the magnitude of the object in the Johnson B filter
  • V – the magnitude of the object in the Johnson V filter
  • – the magnitude of the object in the Cousins R filter
  • – the magnitude of the object in the Cousins I filter

Identifiers

This tab lists selected identifiers of the object in a selected galaxy or with selected status. If the star has no identifier in the particular catalog, the field is left blank.

  • Star Name – the name of the object used in the catalog, for other identifiers, please see the tab “Identifiers”
  • Confirmed – the status of the symbiotic binary (confirmed as symbiotic binary or a symbiotic candidate)
  • Galaxy – galaxy to which the object belongs
  • SIMBAD – the default identifier of the object in the SIMBAD database
  • Gaia DR2 – identifier of the object in the Gaia DR2
  • 2MASS – identifier of the object in the 2MASS catalog
  • IRAS – identifier of the object in the IRAS catalog
  • WISE – identifier of the object in the WISE catalog
  • AAVSO – identifier of the object used by AAVSO in their VSX database

Observations

This tab presents the observations of the objects from the selected galaxy or status, mainly their brightness in different spectral regions and bands and other observational properties:

  • Star Name – the name of the object used in the catalog, for other identifiers, please see the tab “Identifiers”
  • Confirmed – the status of the symbiotic binary (confirmed as symbiotic binary or a symbiotic candidate)
  • Galaxy – galaxy to which the object belongs
  • U* – the magnitude of the object in the Johnson U filter
  • – the magnitude of the object in the Johnson B filter
  • V – the magnitude of the object in the Johnson V filter
  • – the magnitude of the object in the Cousins R filter
  • – the magnitude of the object in the Cousins I filter
  • G* – the magnitude of the object in the Gaia G filter
  • J* – the magnitude of the object in the filter
  • H* – the magnitude of the object in the filter
  • K* – the magnitude of the object in the filter
  • L* – the magnitude of the object in the filter
  • X-ray – detection of X-ray radiation from the star (if the star was not observed, this field is empty)
  • Type* – type of observed X-ray spectrum (α, β, γ, δ and β/δ; according to the scheme proposed by Mürset et al. (1997) and revised by Luna et al.  (2013))
  • IUE* – availability of the observation by IUE satellite
  • IRAS F12* – IRAS flux at 12 μm
  • IRAS F25* – IRAS flux at 25 μm
  • IRAS F60* – IRAS flux at 60 μm
  • IRAS F100* – IRAS flux at 100 μm
  • WISE W1* – the magnitude in the WISE W1 filter
  • WISE W2* – the magnitude in the WISE W2 filter
  • WISE W3* – the magnitude in the WISE W3 filter
  • WISE W4* – the magnitude in the WISE W4 filter
  • Radio* – observation of the object at radio wavelengths
  • Radio flux* – radio flux at a given wavelength
  • Flickering* – detection of optical flickering
  • Outbursts* – observation of outbursts of the system
  • Type* – type of the observed outbursts (SyN – symbiotic nova, SyRN – symbiotic recurrent nova, Z And – outbursts of the Z Andromedae type)
  • IPmax – maximal ionization potential observed in the spectrum of the system
  • OVI lines – the presence of the Raman-scattered O VI lines in the spectrum

Position

Here you can find information on the position of the object, it’s distance and reddening in the particular line of sight:

  • Star Name – the name of the object used in the catalog, for other identifiers, please see the tab “Identifiers”
  • Confirmed – the status of the symbiotic binary (confirmed as symbiotic binary or a symbiotic candidate)
  • Galaxy – galaxy to which the object belongs
  • α – the right ascension of the object, preferably from the Gaia DR2
  • σ(α)* – error in the right ascension
  • αobs* – the right ascension in the sexagesimal format, preferred by the observers
  • δ – declination of the object, preferably from the Gaia DR2
  • σ(δ)* – error in the declination
  • δobs* – the declination in the sexagesimal format, preferred by the observers
  • l* – galactic longitude
  • b* – galactic latitude
  • PM α* – proper motion in right ascension
  • σ(PM α)* – the error of proper motion in right ascension
  • PM δ* – proper motion in declination
  • σ(PM δ)* – the error of proper motion in declination
  • – distance to the system
  • σ(d)* – the error of the distance to the system
  • E(B-V) – interstellar reddening
  • σ(E(B-V))* – the error of interstellar reddening

Note: In the case of extragalactic symbiotic binary stars, the distance of the galaxy to which the objects belong is listed as the distance to symbiotic binary.

Note: The values of the E(B-V) reddening are taken from Schlafly & Finkbeiner (2011). These values are the galactic dust reddening for a line of sight.

Orbit

In this tab, information on orbital properties of the system is presented, and also the results of the investigation of radial velocities are listed:

  • Star Name – the name of the object used in the catalog, for other identifiers, please see the tab “Identifiers”
  • Confirmed – the status of the symbiotic binary (confirmed as symbiotic binary or a symbiotic candidate)
  • Galaxy – galaxy to which the object belongs
  • P – orbital period
  • σ(P)* – the error of orbital period
  • e – eccentricity of the orbit
  • σ(e)* – the error of eccentricity of the orbit
  • i – the inclination of the orbit
  • σ(i)* – the error of inclination of the orbit
  • Eclipse – the presence of the eclipses
  • Eph Type* – the type of orbital ephemeris
  • Eph T0* – orbital ephemeris T0
  • σ(Eph T0)* – the error of the orbital ephemeris T0
  • RV(γ) – gamma velocity of the system
  • σ(RV)* – error in gamma velocity of the system
  • KG* – semi-amplitude of the giant’s radial velocity variations
  • σ(KG)* – the error of semi-amplitude of the giant’s radial velocity variations
  • T0* – the time of inferior conjunction of the giant
  • aG sini* – the size of the giant’s orbit
  • dc – separation of the components
  • f(M) – mass function
  • q – mass ratio

Cool Component

This tab presents the parameters of a cool giant in the symbiotic systems in the selected galaxy or with selected status:

  • Star Name – the name of the object used in the catalog, for other identifiers, please see the tab “Identifiers”
  • Confirmed – the status of the symbiotic binary (confirmed as symbiotic binary or a symbiotic candidate)
  • Galaxy – galaxy to which the object belongs
  • Spectral type – the spectral type of the giant
  • TeffG – effective temperature of the giant
  • IR type – IR type of the symbiotic star (S, D, D’)
  • Fe/H* – metallicity of the giant
  • MG – the mass of the giant
  • RG – radius of the giant
  • LG – luminosity of the giant
  • Pulsation – the presence of the giant’s pulsation
  • Type* – the type of present pulsations
  • Ppul – pulsation period
  • σ(Ppul)* – the error of pulsation period
  • Ephpul type* – the type of pulsation ephemeris
  • Ephpul T0* – pulsation ephemeris T0
  • σ(Ephpul T0)* – the error of pulsation ephemeris T0

Hot Component

On this tab, following parameters of the hot components in the symbiotic systems observed in the selected galaxy or with selected status can be found:

    • Star Name – the name of the object used in the catalog, for other identifiers, please see the tab “Identifiers”
    • Confirmed – the status of the symbiotic binary (confirmed as symbiotic binary or a symbiotic candidate)
    • Galaxy – galaxy to which the object belongs
    • Type/Spectral type – type or spectral type of the hot component
    • TeffH – effective temperature of the hot component
    • Teffh_lower – the lower limit of the effective temperature of the hot component
    • Teffh_upp – the upper limit of the effective temperature of the hot component
    • MH – the mass of the hot component
    • RH – radius of the hot component
    • LH – luminosity of the hot component
    • Pspin* – the spin period of the hot component
    • Accretion disk* – presence of the accretion disk around the hot component

Note: In the case of the hot component’s effective temperature, if this was obtained using the highest observed ionization potential in the spectra (method proposed by Mürset & Nussbaumer, 1994), it is listed as a lower limit on the effective temperature and if it was calculated using the ratio of He II and Hβ (see e. g. Leedjärv et al., 2016) , it is listed as an upper limit on the effective temperature. 

 

Downloading the data

You can download either the whole database in csv, xlsx and txt formats (links are in the left sidebar) or particular tables in different formats (csv, xlsx, txt, and pdf) using the buttons above every table. If you use the search function, only the selected rows will be saved using the buttons. If you sort the rows by the values in one of the columns, in that order the rows will also be displayed in the saved or printed file.

Pages of the particular objects

Example of the object page of symbiotic star LIN 9.

All symbiotic binaries included in the database have their object pages covering all available information, references, and notes. The page of the object is divided into several sections. You can access the page of the object from any table by clicking on the name of the star or search it at the top right of the website.

In the top of the page of the particular object, there are coordinates of the star, basic information and Aladin interactive view of the vicinity of the star. The second section list identifiers of the object with the links to measurements from catalogs (e. g. 2MASS, WISE or Gaia DR2). In the next section, equatorial and galactical coordinates are listed in addition to parallax, proper motions, distance, and reddening in the direction of the star.

Note: In the case of extragalactic symbiotic binary stars, the distance of the galaxy to which the objects belong is listed as the distance to symbiotic binary.

Note: The values of the E(B-V) reddening are taken from Schlafly & Finkbeiner (2011). These values are the galactic dust reddening for a line of sight.

This information is followed by the section presents the observations of the particular object, mainly its brightness in different spectral regions and bands (U, B, V, R, I, G, J, H, K, L, IRAS flux at 12, 25, 60 and 100 μm, WISE W1, W2, W3 and W4) and other observational properties – if the star was observed and detected in radio and X-ray (and the type of its X-ray spectra), presence and type of outbursts, flickering and Raman-scattered O VI lines in the optical spectra.

In the next section, information on orbital properties of the system is presented, including its orbital period and orbital ephemeris, eccentricity, and inclination of the orbit, the presence of eclipses. In this part also the results of the investigation of radial velocities are listed – gamma velocity of the system, semiamplitude of giant’s radial velocity and the time of the inferior conjunction of the giant and derived parameters like size of the giant’s orbit, separation of the components in the system, mass function and mass ratio.

That is followed by the parameters of both components. In the first section parameters of the cool component are presented – its spectral type, effective temperature, IR (symbiotic) type, metallicity, mass, radius, and luminosity. There is also information if the star pulsates and also the possible type of pulsation, period and ephemeris. In the case of the hot component, in addition to the type of the object, effective temperature, mass, radius and luminosity, the information on spin period and presence of accretion disk is added.

Note: In the case of the hot component’s effective temperature, if this was obtained using the highest observed ionization potential in the spectra (method proposed by Mürset & Nussbaumer, 1994), it is listed as a lower limit on the effective temperature and if it was calculated using the ratio of He II and Hβ (see e. g. Leedjärv et al., 2016) , it is listed as an upper limit on the effective temperature. 

The object pages contain also links to the portals of SIMBAD, CDS, and VSX (if the object is included). In the near future, we plan to add direct links to the measurements of individual symbiotic variables obtained from sky surveys such as OGLE, MACHO and ASAS-SN. Part of the pages is devoted to the notes which include important or interesting information on the object and the page ends with the references. One can also found the date of the last update of information on the particular page on its bottom.

Note: In the section with references, selected publications concerning the object can be found. References for particular data are always listed next to the presented values.