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GAUDI G round-based A steroseismology U niform D atabase I nterface

GAUDI G round-based A steroseismology U niform D atabase I nterface http://ines.laeff.esa.es/corot/. E. Solano Bases de données en spectroscopie stellaire. Paris. Sep. 2003. E. Solano. Paris. Sep 2003. The origins.

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GAUDI G round-based A steroseismology U niform D atabase I nterface

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  1. GAUDI Ground-based Asteroseismology Uniform Database Interface http://ines.laeff.esa.es/corot/ E. Solano Bases de données en spectroscopie stellaire. Paris. Sep. 2003

  2. E. Solano. Paris. Sep 2003 The origins • Target selection in the COROT mission is a critical issue (staying six months observing a binary star would have been very depressing). • Theoretical pulsation models requires a precise knowledge of the stellar physical parameters (Teff, log g, metallicity) • An ambitious ground-based observing programme (more than 1500 objects, mainly spectroscopy and photometry) was initiated. • Having an user-friendly access system to these data was considered as of fundamental importance since the beginning of the project. • March 2001: LAEFF - COROT agreement to develop GAUDI.

  3. Archives: are they necessary? • Efficiency:The collective impact of the archive will far exceed what could be produced by the programs of single observer or team of observers. • Astronomers might find that the observations they wanted had already been made, and that it was simply a matter of retrieving the relevant information. • One set of observations can serve many different scientific purposes, including some not considered when the observations were made. • Exploit the time domain. • Periodic phenomena: Variable stars • Transient phenomena: SN, NEO, GRB,.. E. Solano IAA. Feb 2003

  4. The need of Archives (II) • Legacy: Guarantee that the valuable datasets are usable by future generations for research and education. • Positive “Globalization”: Astronomers from countries with limited resources have the opportunity of accessing high-quality data. “A well-designed and properly implemented archive is a major contribution toward the full exploitation from the expensive-to-obtain observational data”. E. Solano. Paris. Sep 2003

  5. Reduced data Calib. Files Raw Data + Processing Pipeline Database (Meta-data) Science Archive Storage system (FITS files) E. Solano. Paris. Sep 2003

  6. E. Solano. Paris. Sep 2003 Data Management • Data stored in the archive are indexed in an inventory management subsystem (RDBMS). • To ensure integrity, metadata will be extracted from FITS keywords and ingested the database in an automatic way. Data Storage • Data will resided on a mass storage system (magnetic disks) in FITS format. • Data integrity requires a well-defined backup policy and data safekeeping.

  7. Reduced data Calib. Files Raw Data + Processing Pipeline Database (Meta-data) Science Archive Storage system (FITS files) End-User User Interface (HTML)

  8. Data Retrieval and User Interface System • The friendliness of the user interface is extremely important for the archive to be effectively used by the community at large. • The UI will be HTML-based to allow simple use through the Web. • The system should be easy for new users to learn. E. Solano. Paris. Sep 2003

  9. The User Interface User Interface Visualisation & analysis tools Data query & retrieval c System description, On-line help& Helpdesk Interoperability E. Solano. Paris. Sep 2003

  10. GAUDI. The Help Systems • Different levels of help to users • On-line Access to project documentation: A detailed description of the project, the archive and access system shall be given on-line and stored in a format allowing an easy browsing (e.g. PDF). • On-line help: Help on a specific keyword can be obtained by simply clicking on it. • HelpDesk: to channel questions and to provide continuous support to users of the Archive. E. Solano. Paris. Sep 2003

  11. GAUDI. The Help Systems

  12. E. Solano. Paris. Sep 2003 On-line Help

  13. E. Solano. Paris. Sep 2003 The User Interface User Interface Visualisation & analysis tools Data query & retrieval Data query & retrieval c System description, On-line help& Helpdesk Interoperability

  14. The GAUDI welcome page c • Access restricted to COROT project • Username & password provided on demand.

  15. The COROT input query form

  16. The result of the query Name resolver. Multidownload with different compression formats

  17. Link to SIMBAD

  18. The result of the query

  19. Display of the FITS header

  20. The result of the query

  21. Zoom facility Link to full header Plot can be saved as GIF file Plotting facilities

  22. The COROT input query form

  23. The result of the query

  24. The COROT input query form

  25. The result of the query

  26. E. Solano. Paris. Sep 2003 The User Interface User Interface Visualisation & analysis tools Data query & retrieval c System description, On-line help& Helpdesk Interoperability

  27. E. Solano. Paris. Sep 2003 Analysis tools “A modern multi-wavelength data server must not be a simply data repository. It must include tools to help the users in the data analysis” • Multi-range spectroscopy: building of SEDs • Comparison to models or theoretical data • Data mining

  28. Synthetic model s E. Solano. Paris. Sep 2003 Comparison to models or theoretical data Synthetic model E. Solano IAA. Feb 2003

  29. E. Solano. Paris. Sep 2003 The User Interface User Interface Visualisation & analysis tools Data query & retrieval c System description, On-line help& Helpdesk Interoperability

  30. E. Solano. Paris. Sep 2003 The GAUDI Interoperability Science Archive Science Archive GAUDI Science Archive Science Archive

  31. E. Solano. Paris. Sep 2003 Interoperability Levels • Internal • Among the Mission & User Archives and the preparatory archives (COROTSKY and GAUDI). • External • First level: • General-purpose catalogues: ADS, SIMBAD • Second level: • Other astronomical databases: 2MASS, DENIS, SLOAN, DSS, ... • Third level: • VO federation. Uniform access to a federation of multi-wavelength distributed archives. Data exchange according to agreed standards. c

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