voexplorer : visualising data discovery in the virtual observatory

ADASS, London Sep 23-26, 2007

VOExplorerVOExplorer: Visualising Data Discovery in the : Visualising Data Discovery in the Virtual Observatory Virtual Observatory

Jonathan TeddsJonathan Tedds

University of Leicester/University of Leicester/AstroGridAstroGrid//EuroVO DCA science teamEuroVO DCA science team

[email protected]@star.le.ac.uk


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

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

http://www.astrogrid.org/


VO Explorer: beta release ~Nov 07VO Explorer: beta release ~Nov 07

AstroGrid front end, AstroGrid front end, part of VOdesktoppart of VOdesktop

Resource-centricResource-centric Select a search-spaceSelect a search-space Search for resourcesSearch for resources Filter these resourcesFilter these resources View selected View selected

resourcesresources Use the selectionUse the selection

– Invoke itInvoke it– Save/Bookmark/Tag itSave/Bookmark/Tag it– Export itExport it


Access existing X-ray cluster cataloguesAccess existing X-ray cluster catalogues

Browse through keyword metadataBrowse through keyword metadata


Find


Resources!


Euro-VO: Euro-VO: – Technical System withTechnical System with– Content + Resources andContent + Resources and– Operations + SupportOperations + Support

Science drivenScience driven– VO Technology CentreVO Technology Centre– VO Facility CentreVO Facility Centre– VO Data Centre AllianceVO Data Centre Alliance

Euro-VO Science advised Euro-VO Science advised via Euro-VO Science via Euro-VO Science Advisory GroupAdvisory Group

content +resources

technicalsystem

operations +support


If data in a simple DB can If data in a simple DB can publish to VO in ~day!publish to VO in ~day!

As demonstrated at As demonstrated at June07 EuroVO DCA June07 EuroVO DCA workshop at ESACworkshop at ESAC

For catalogues, For catalogues, images,spectra & images,spectra &

transient eventstransient events

content +resources

technicalsystem

operations +support


Description


Filter


Query on position

Explore by position: AstroScopeExplore by position: AstroScope


Plastic/SAMP – visualise selected dataPlastic/SAMP – visualise selected data

Jonathan TeddsJonathan Tedds Enabling VO ScienceEnabling 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


Access all extended 2XMM X-ray sourcesAccess all extended 2XMM X-ray sources

Make own X-ray cluster candidate catalogueMake own X-ray cluster candidate catalogue Filter large multiwavelength archives Filter large multiwavelength archives

remotely:remotely:– Create manageable science subsetsCreate manageable science subsets


247K detections 247K detections 192K unique 192K unique sourcessources

– 520 sq.deg. / 330 sq.degs 520 sq.deg. / 330 sq.degs excluding overlapexcluding overlap

– Full catalogue product set Full catalogue product set availableavailable

– World’s largest ever X-ray World’s largest ever X-ray catalogue – catalogue – see poster bysee poster by C.Page et al.C.Page et al.

Just Out (Aug07)Just Out (Aug07): THE 2XMM CATALOGUE: THE 2XMM CATALOGUE


Find


Columns


Filter columns


Use


Query


Help!


Save as format


Save results


Correlation with SDSSCorrelation with SDSS

Select SDSS galaxies within 1 arcmin of 411 X-ray Select SDSS galaxies within 1 arcmin of 411 X-ray positionspositions– photometry (ugriz), photometric redshiftsphotometry (ugriz), photometric redshifts– spectra, spectroscopic redshiftsspectra, spectroscopic redshifts– colour thumbnail imagescolour thumbnail images

Visual inspection of images, spectroscopic and Visual inspection of images, spectroscopic and photoscopic redshiftsphotoscopic redshifts

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


Correlation with SDSSCorrelation with SDSS

Spectroscopic z = 0.223 (Lamer+, in prep)Spectroscopic z = 0.223 (Lamer+, in prep)


AstroGrid front end, AstroGrid front end, part of VOdesktoppart of VOdesktop

Resource-centricResource-centric Select a search-spaceSelect a search-space Search for resourcesSearch for resources Filter these resourcesFilter these resources View selected View selected

resourcesresources Use the selectionUse the selection

– Invoke itInvoke it– Save/Bookmark/Tag itSave/Bookmark/Tag it– Export itExport it

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

http://www.astrogrid.org/


Better stop…!Better stop…!

voexplorer : visualising data discovery in the virtual observatory

Documents

gonzalezsolares talkpython

xmm xray sourcesmake

upstairsvo explorer

selected datahelioscope

simple db

results of time queries

esacfor catalogues

photometric redshiftsspectra