vo access to gaia dr1€¦ · ivoa interop - trieste 2016 - apps ii gaia dr1 • released september...
TRANSCRIPT
![Page 1: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/1.jpg)
VOaccesstoGaiaDR1:TAP,ConeSearch,COOSYSandHiPS
ThomasBoch,onbehalfoftheCDSteamTriesteInterop,Apps2
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1
• ReleasedSeptember14th2016
• Content
• gaia_source:positionandflux(Gband) for1billionsources
• TGAS:position,flux,propermotionsandparallax for2millionsources
• lightcurvesforRRLyraeandCepheid
• QSOs
2
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IVOA Interop - Trieste 2016 - Apps II
Whodistributesthedata?
3
Officialarchive GaiaarchiveatESAC VOTable TAP SAMP
Partnerdatacenters
AIP VOTable SAMP
ARI VOTable TAP CS SAMP
ASDC VOTable
CDS VOTable TAP CS SAMP
Externaldatacenters
IRSA VOTable TAP CS
GAVO VOTable TAP
![Page 4: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/4.jpg)
IVOA Interop - Trieste 2016 - Apps II
Whodistributesthedata?
3
Officialarchive GaiaarchiveatESAC VOTable TAP SAMP
Partnerdatacenters
AIP VOTable SAMP
ARI VOTable TAP CS SAMP
ASDC VOTable
CDS VOTable TAP CS SAMP
Externaldatacenters
IRSA VOTable TAP CS
GAVO VOTable TAP
![Page 5: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/5.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS
• VizieR
• TAPVizieR
• Cross-matchservice
• Aladin
• HiPScatalogue
http://cds.unistra.fr/gaia
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieR
• VizieRwebinterface
• Querybyposition +constraintsonfields
• ConeSearchinterface
• Lightcurvesvisualization
5
![Page 7: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/7.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieR
• VizieRwebinterface
• Querybyposition +constraintsonfields
• ConeSearchinterface
• Lightcurvesvisualization
5
![Page 8: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/8.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieR
• VizieRwebinterface
• Querybyposition +constraintsonfields
• ConeSearchinterface
• Lightcurvesvisualization
5
![Page 9: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/9.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieR
• VizieRwebinterface
• Querybyposition +constraintsonfields
• ConeSearchinterface
• Lightcurvesvisualization
5
![Page 10: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/10.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieR
• VizieRwebinterface
• Querybyposition +constraintsonfields
• ConeSearchinterface
• Lightcurvesvisualization
5
![Page 11: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/11.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieR
• VizieRwebinterface
• Querybyposition +constraintsonfields
• ConeSearchinterface
• Lightcurvesvisualization
5
3+ million querieslast month
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieRTAP
• GaiaDR1tablesavailableinTAPVizieR
• UserscanqueryGaiatablesandcomplement/jointhemwithanyavailableVizieRtable(notablyHipparcos,Tycho,largesurveyslike2MASS,SDSS,etc)
• Webinterface:http://tapvizier.u-strasbg.fr/adql/
• TAPendpoint:http://tapvizier.u-strasbg.fr/TAPVizieR/tap/
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieRTAP
• GaiaDR1tablesavailableinTAPVizieR
• UserscanqueryGaiatablesandcomplement/jointhemwithanyavailableVizieRtable(notablyHipparcos,Tycho,largesurveyslike2MASS,SDSS,etc)
• Webinterface:http://tapvizier.u-strasbg.fr/adql/
• TAPendpoint:http://tapvizier.u-strasbg.fr/TAPVizieR/tap/
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:VizieRTAP
• GaiaDR1tablesavailableinTAPVizieR
• UserscanqueryGaiatablesandcomplement/jointhemwithanyavailableVizieRtable(notablyHipparcos,Tycho,largesurveyslike2MASS,SDSS,etc)
• Webinterface:http://tapvizier.u-strasbg.fr/adql/
• TAPendpoint:http://tapvizier.u-strasbg.fr/TAPVizieR/tap/
6
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:xmatchservice
• Fastpositionalcross-identificationofGaiasourceswithanyVizieRtablewithposition (oruser-uploadedtable)
• Webinterface:http://cdsxmatch.u-strasbg.fr/xmatch
• HTTPAPI
• astroquery
• Topcat
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:xmatchservice
• Fastpositionalcross-identificationofGaiasourceswithanyVizieRtablewithposition (oruser-uploadedtable)
• Webinterface:http://cdsxmatch.u-strasbg.fr/xmatch
• HTTPAPI
• astroquery
• Topcat
7
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:xmatchservice
• Fastpositionalcross-identificationofGaiasourceswithanyVizieRtablewithposition (oruser-uploadedtable)
• Webinterface:http://cdsxmatch.u-strasbg.fr/xmatch
• HTTPAPI
• astroquery
• Topcat
7
![Page 18: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/18.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:xmatchservice
• Fastpositionalcross-identificationofGaiasourceswithanyVizieRtablewithposition (oruser-uploadedtable)
• Webinterface:http://cdsxmatch.u-strasbg.fr/xmatch
• HTTPAPI
• astroquery
• Topcat
7
Stats: 130M positions submitted from 200+ different IPs
![Page 19: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/19.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:Aladin
• DedicatedformtoaccessGaiadatainAladinDesktop
• Visualizationofpropermotions
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:Aladin
• DedicatedformtoaccessGaiadatainAladinDesktop
• Visualizationofpropermotions
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:Aladin
• DedicatedformtoaccessGaiadatainAladinDesktop
• Visualizationofpropermotions
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![Page 22: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/22.jpg)
IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:HiPScatalogue
• HiPSprogressivecataloguebuiltfromGaiadatahttp://cds.unistra.fr/Gaia/DR1/AL-visualisation.gml
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IVOA Interop - Trieste 2016 - Apps II
GaiaDR1atCDS:HiPScatalogue
• HiPSprogressivecataloguebuiltfromGaiadatahttp://cds.unistra.fr/Gaia/DR1/AL-visualisation.gml
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IVOA Interop - Trieste 2016 - Apps II
VOaccesstoGaiadata:thegood,thebad,theugly
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IVOA Interop - Trieste 2016 - Apps II
VOaccesstoGaia:thegood
• Dataavailablethroughnumerousservices
• Servicesdoworkfine
• SamecolumnnamesinallTAPservices
• user-friendly
• allowsforeasyre-launchofthesamequeryondifferentservices
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IVOA Interop - Trieste 2016 - Apps II
VOaccesstoGaia:theugly
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• PoormetadatadescribingoutputFIELDs
• noUCD
• nounit
• non-standardnon-parseableunits
![Page 27: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/27.jpg)
IVOA Interop - Trieste 2016 - Apps II
VOaccesstoGaia:theugly
12
unit="Angle[deg]"
unit="Time[Julian Years]"
• PoormetadatadescribingoutputFIELDs
• noUCD
• nounit
• non-standardnon-parseableunits
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IVOA Interop - Trieste 2016 - Apps II
VOaccesstoGaia:theugly
• Unitparser/validator:http://www.astro.gla.ac.uk/users/norman/ivoa/unity/
• UCDtools:http://cds.unistra.fr/UCD/tools.htx
12
unit="Angle[deg]"
unit="Time[Julian Years]"
• PoormetadatadescribingoutputFIELDs
• noUCD
• nounit
• non-standardnon-parseableunits
![Page 29: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/29.jpg)
IVOA Interop - Trieste 2016 - Apps II
VOaccesstoGaia:thebad
• (Lackof)definitionofcoordinatesysteminVOTableoutput
• examples
• nodescriptionatall
• inaccuratedescription
• accuratedescription
13
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IVOA Interop - Trieste 2016 - Apps II
Nodescription
14
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IVOA Interop - Trieste 2016 - Apps II
Nodescription
14
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IVOA Interop - Trieste 2016 - Apps II
Nodescription
14
Coordinate system?
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IVOA Interop - Trieste 2016 - Apps II
Nodescription
14
Coordinate system?
Epoch?
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IVOA Interop - Trieste 2016 - Apps II
Inaccuratedescription
15
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IVOA Interop - Trieste 2016 - Apps II
Inaccuratedescription
15
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IVOA Interop - Trieste 2016 - Apps II
Inaccuratedescription
15
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IVOA Interop - Trieste 2016 - Apps II
Inaccuratedescription
15
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IVOA Interop - Trieste 2016 - Apps II
Inaccuratedescription
15
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IVOA Interop - Trieste 2016 - Apps II
Inaccuratedescription
15
But Gaia positions are in ICRS!
![Page 40: VO access to Gaia DR1€¦ · IVOA Interop - Trieste 2016 - Apps II Gaia DR1 • Released September 14th 2016 • Content • gaia_source: position and flux (G band) for 1 billion](https://reader034.vdocuments.site/reader034/viewer/2022050517/5fa1805d5df62844553c6966/html5/thumbnails/40.jpg)
IVOA Interop - Trieste 2016 - Apps II
Accuratedescription
16
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IVOA Interop - Trieste 2016 - Apps II
Accuratedescription
16
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IVOA Interop - Trieste 2016 - Apps II
Accuratedescription
16
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IVOA Interop - Trieste 2016 - Apps II
Accuratedescription
16
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IVOA Interop - Trieste 2016 - Apps II
Accuratedescription
16
Based on Referencing STC in VOTable note v2.0
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IVOA Interop - Trieste 2016 - Apps II
Howtoimprovedescriptionofcoordinates?
• InBanff(nov2014):
• only1serviceprovider(outof20tested)wasdescribingcoordinatesaccordingtotheReferencingSTCinVOTablenote
• only1clientwasparsingthedescriptionasexpected
• suggestiontoun-deprecateCOOSYSasatemporarysolutiontoincreasenumberofservicesandclientssupportingcoordinatesdescription/parsing
• COOSYSnotenough,can’tdescribeeverything(eg:differentepochforeachsource)
• Howshallwegoon?
17