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VOExplorer : Visualising Data Discovery in the Virtual Observatory

VOExplorer : Visualising Data Discovery in the Virtual Observatory. Jonathan Tedds University of Leicester/ AstroGrid / EuroVO DCA science team jat@star.le.ac.uk. http://www.astrogrid.org – see our demo stand upstairs.

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VOExplorer : Visualising Data Discovery in the Virtual Observatory

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  1. VOExplorer: Visualising Data Discovery in the Virtual Observatory Jonathan Tedds University of Leicester/AstroGrid/ EuroVO DCA science team jat@star.le.ac.uk

  2. http://www.astrogrid.org – see our demo stand upstairs VO Explorer: Noel Winstanley + Andy Lawrence & AstroGrid science team

  3. VO Explorer: beta release ~Nov 07 • AstroGrid front end, part of VOdesktop • Resource-centric • Select a search-space • Search for resources • Filter these resources • View selected resources • Use the selection • Invoke it • Save/Bookmark/Tag it • Export it

  4. Access existing X-ray cluster catalogues • Browse through keyword metadata

  5. Find

  6. Resources!

  7. Euro-VO: • Technical System with • Content + Resources and • Operations + Support • Science driven • VO Technology Centre • VO Facility Centre • VO Data Centre Alliance • Euro-VO Science advised via Euro-VO Science Advisory Group content + resources technical system operations + support

  8. If data in a simple DB can publish to VO in ~day! • As demonstrated at June07 EuroVO DCA workshop at ESAC • For catalogues, images,spectra & transient events content + resources technical system operations + support

  9. Description

  10. Filter

  11. Query on position

  12. Explore by position: AstroScope

  13. Plastic/SAMP – visualise selected data

  14. HelioScope displays the results of time queries submitted to Simple Time Access Protocol (STAP) web services – E.Auden, S.Dalla + VOevent(e.g. A.Allan) STAP specification: http://wiki.astrogrid.org/bin/view/Astrogrid/SimpleTimeAccessProtocol • STAP query parameters: • Start / stop datetimes (mandatory) • Data format (mandatory) • Instrument ID • Time resolution • Data ID of individual data products • Position RA & Dec (for astronomical events) • Size of search box around position RA & Dec • Band – wavelength range

  15. Access all extended 2XMM X-ray sources • Make own X-ray cluster candidate catalogue • Filter large multiwavelength archives remotely: • Create manageable science subsets

  16. Just Out (Aug07): THE 2XMM CATALOGUE • 247K detections  192K unique sources • 520 sq.deg. / 330 sq.degs excluding overlap • Full catalogue product set available • World’s largest ever X-ray catalogue – see poster by C.Page et al.

  17. Find

  18. Columns

  19. Filter columns

  20. Use

  21. Query

  22. Help!

  23. Save as format

  24. Save results

  25. Correlation with SDSS • Select SDSS galaxies within 1 arcmin of 411 X-ray positions • photometry (ugriz), photometric redshifts • spectra, spectroscopic redshifts • colour thumbnail images • Visual inspection of images, spectroscopic and photoscopic redshifts

  26. Python, Perl, IDL scripts • Single archive image search • Cone search for multiple, user defined archives • Sextractor script – generate catalogue from images • Montage - mosaic tool • Taverna • Graphical interface • Embed existing code (any language) Workflows – see E.Gonzalez-Solares talk

  27. Python, Perl, IDL scripts • Single archive image search • Cone search for multiple, user defined archives • Sextractor script – generate catalogue from images • Montage - mosaic tool • Taverna • Graphical interface • Embed existing code (any language) Workflows – see E.Gonzalez-Solares talk

  28. Python, Perl, IDL scripts • Single archive image search • Cone search for multiple, user defined archives • Sextractor script – generate catalogue from images • Montage - mosaic tool • Taverna • Graphical interface • Embed existing code (any language) Workflows – see E.Gonzalez-Solares talk

  29. Correlation with SDSS Spectroscopic z = 0.223 (Lamer+, in prep)

  30. http://www.astrogrid.org – see our demo stand upstairs • AstroGrid front end, part of VOdesktop • Resource-centric • Select a search-space • Search for resources • Filter these resources • View selected resources • Use the selection • Invoke it • Save/Bookmark/Tag it • Export it

  31. Better stop…!

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