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VOExplorer : Visualising Data Discovery in the Virtual Observatory

VOExplorer, developed by the University of Leicester and the AstroGrid science team, revolutionizes astronomical data discovery. This resource-centric platform allows users to select a search space, search for, filter, and view a wide range of astronomical resources, including X-ray cluster catalogs and time event data. With features such as bookmarking, tagging, and exporting results, VOExplorer streamlines the process of exploring complex datasets. Join us on this journey to visualize data effectively and harness the power of the Virtual Observatory for groundbreaking scientific research.

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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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