VOSA. Help and Documentation

Version 6.0, Apr 2018

1. Introduction
2. Input files
2.1. Upload files
2.2. VOSA file format
2.3. Single object
2.4. Manage files
2.5. Archiving
2.6. Filters
3. Objects
3.1. Coordinates
3.2. Distances
3.3. Extinction
4. Build SEDs
4.1. VO photometry
4.2. SED
4.3. Excess
5. Analysis
5.1. Model Fit
5.2. Bayes analysis
5.3. Template Fit
5.4. Templates Bayes
5.5. HR diagram
5.6. Upper Limits
5.7. Statistics
6. Save results
6.1. Download
6.2. SAMP
6.3. References
6.4. Log file
6.5. Plots
7. VOSA Architecture
8. Phys. Constants
9. FAQ
10. Use Case
11. Quality
11.1. Stellar libraries
11.2. VO photometry
12. Credits
13. Helpdesk
14. About


VOSA uses some external services and theoretical models that you might want to cite or acknowledge if your science benefits from the use of this tool.

You can find below the description and, when appropiate, the bibliographic reference corresponding to all of them.

When you download the results obtained by VOSA two files will be included: info/refs.dat with the references to all the services used to obtain the results and info/refs.bibtex.bib with the bibtex entries corresponding to all those references.



  • Please include the following in any published material that makes use of VOSA:
    This publication makes use of VOSA, developed under the Spanish Virtual Observatory project supported by the Spanish MINECO through grant AyA2017-84089.

  • If your research benefits from the use of VOSA, we would appreciate if you could include the following reference in your publication:
    Bayo, A., Rodrigo, C., Barrado y Navascués, D., Solano, E., Gutiérrez, R., Morales-Calderón, M., Allard, F. 2008, A&A 492,277B.

Theoretical Spectra.

Template fit

Theoretical Isochrones and Evolutionary Tracks

  • BT-Settl Isochrones and Evolutionary Tracks kk
    • BHAC15 Isochrones and Evolutionary Tracks
    • NextGen Isochrones and Evolutionary Tracks
    • COND99 Isochrones and Evolutionary Tracks
    • DUSTY99 Isochrones and Evolutionary Tracks
    • Siess Isochrones and Evolutionary Tracks

    VO Photometry

    Object coordinates

    • Simbad
      • Acknowledge:
        This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France

      • The SIMBAD astronomical database. The CDS reference database for astronomical objects
        Wenger et al. 2000, A&AS 143, 9W

    Object distance VO services


    Extinction properties VO services