1. ADASS, London Sep 23-26, 2007 VOExplorer : Visualising Data Discovery in the Virtual Observatory Jonathan Tedds University of Leicester/AstroGrid/ EuroVO DCA science team jat@star.le.ac.uk

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

3. Jonathan Tedds 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. Jonathan Tedds Access existing X-ray cluster catalogues  Browse through keyword metadata

5. Jonathan Tedds Find

6. Jonathan Tedds Resources!

7. Jonathan Tedds  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. Jonathan Tedds  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 transient events content + resources technical system operations + support

9. Jonathan Tedds Description

10. Jonathan Tedds Filter

11. Jonathan Tedds Query on position

12. Explore by position: AstroScope

13. Jonathan Tedds Plastic/SAMP – visualise selected data

14. Jonathan TeddsEnabling VO Science 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. Jonathan Tedds Access all extended 2XMM X-ray sources  Make own X-ray cluster candidate catalogue  Filter large multiwavelength archives remotely: –Create manageable science subsets

16. Jonathan TeddsEnabling VO Science  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. Just Out (Aug07): THE 2XMM CATALOGUE

17. Jonathan Tedds Find

18. Jonathan Tedds Columns

19. Jonathan Tedds Filter columns

20. Jonathan Tedds Use

21. Jonathan Tedds Query

22. Jonathan Tedds Help!

23. Jonathan Tedds Save as format

24. Jonathan Tedds Save results

25. Jonathan TeddsEnabling VO Science 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. Workflows – see E.Gonzalez-Solares talk 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)

27. Workflows – see E.Gonzalez-Solares talk 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)

28. Workflows – see E.Gonzalez-Solares talk 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)

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

30. Jonathan Tedds  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 http://www.astrogrid.org – see our demo stand upstairshttp://www.astrogrid.org

31. Jonathan Tedds Better stop…!