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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

VOExplorer: Visualising Data Discovery in the Virtual Observatory

Jonathan Tedds

University of Leicester/AstroGrid/

EuroVO DCA science team

jat@star.le.ac.uk

slide2

http://www.astrogrid.org – see our demo stand upstairs

VO Explorer: Noel Winstanley + Andy Lawrence & AstroGrid science team

vo explorer beta release nov 07
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
access existing x ray cluster catalogues
Access existing X-ray cluster catalogues
  • Browse through keyword metadata
slide7
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

slide8
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

slide14

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
access all extended 2xmm x ray sources
Access all extended 2XMM X-ray sources
  • Make own X-ray cluster candidate catalogue
  • Filter large multiwavelength archives remotely:
    • Create manageable science subsets
slide16

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.
correlation with sdss
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

workflows see e gonzalez solares talk1

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

workflows see e gonzalez solares talk2

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

correlation with sdss1
Correlation with SDSS

Spectroscopic z = 0.223 (Lamer+, in prep)

slide30

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