ADASS, London Sep 23-26, 2007 VOExplorer : Visualising Data Discovery in the Virtual Observatory Jonathan Tedds University of Leicester/AstroGrid/ EuroVO DCA science team

Jonathan Tedds – see our demo stand upstairshttp:// VO Explorer: Noel Winstanley + Andy Lawrence & AstroGrid science team

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

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

Jonathan Tedds Find

Jonathan Tedds Resources!

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

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

Jonathan Tedds Description

Jonathan Tedds Filter

Jonathan Tedds Query on position

Explore by position: AstroScope

Jonathan Tedds Plastic/SAMP – visualise selected data

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: 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

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

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

Jonathan Tedds Find

Jonathan Tedds Columns

Jonathan Tedds Filter columns

Jonathan Tedds Use

Jonathan Tedds Query

Jonathan Tedds Help!

Jonathan Tedds Save as format

Jonathan Tedds Save results

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

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)

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)

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)

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

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 – see our demo stand upstairshttp://

Jonathan Tedds Better stop…!