European Space Astronomy Centre Pedro OSUNA Catalogue DM Subgroup Poona IVOA Sep 2004 IVOA Data...
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Transcript of European Space Astronomy Centre Pedro OSUNA Catalogue DM Subgroup Poona IVOA Sep 2004 IVOA Data...
![Page 1: European Space Astronomy Centre Pedro OSUNA Catalogue DM Subgroup Poona IVOA Sep 2004 IVOA Data Model group CATALOG(UE) Data Model progress P.Osuna.](https://reader036.fdocuments.in/reader036/viewer/2022082805/55149d05550346b2598b591a/html5/thumbnails/1.jpg)
European Space Astronomy CentrePedro OSUNACatalogue DM Subgroup Poona IVOA Sep 2004
IVOA Data Model group
CATALOG(UE) Data Model progressP.Osuna
![Page 2: European Space Astronomy Centre Pedro OSUNA Catalogue DM Subgroup Poona IVOA Sep 2004 IVOA Data Model group CATALOG(UE) Data Model progress P.Osuna.](https://reader036.fdocuments.in/reader036/viewer/2022082805/55149d05550346b2598b591a/html5/thumbnails/2.jpg)
European Space Astronomy CentrePedro OSUNACatalogue DM Subgroup Poona IVOA Sep 2004
Catalogue Subgroup history
Created after Cambridge (Boston) by Jonathan McDowell Coordinator: P. Osuna Members so far:
Elizabeth Auden Kirk Borne Clive Davenhall Martin Hill Mireille Louys Jonathan McDowell (DM chairman) Francois Ochsenbein Jesus Salgado Ed Shaya Mark Taylor Brian Thomas
![Page 3: European Space Astronomy Centre Pedro OSUNA Catalogue DM Subgroup Poona IVOA Sep 2004 IVOA Data Model group CATALOG(UE) Data Model progress P.Osuna.](https://reader036.fdocuments.in/reader036/viewer/2022082805/55149d05550346b2598b591a/html5/thumbnails/3.jpg)
European Space Astronomy CentrePedro OSUNACatalogue DM Subgroup Poona IVOA Sep 2004
What to model
WHAT is a Catalogue? Dictionary view: An ordered collection of items However, different views depending on the project:
• SkyView: Catalogue word appears everywhere: an (X-Y) table? A DB table? A set of DB tables?
• Vizier: a set of (X-Y) tables? One single (X-Y) table?
• Others: ?
What are we after? Initial idea: model Source Catalogues Model 2-D “tables” or N-D ones? But what do we mean by 2-D or N-D? Relation to other Data Models (N-Dimensionality)
![Page 4: European Space Astronomy Centre Pedro OSUNA Catalogue DM Subgroup Poona IVOA Sep 2004 IVOA Data Model group CATALOG(UE) Data Model progress P.Osuna.](https://reader036.fdocuments.in/reader036/viewer/2022082805/55149d05550346b2598b591a/html5/thumbnails/4.jpg)
European Space Astronomy CentrePedro OSUNACatalogue DM Subgroup Poona IVOA Sep 2004
What to model II
People’s concerns: Are we re-modeling VOTable? Do not confuse Data Model with representation/serialization Do not work in a too narrow DM
BUT: do NOT lose focus: from Andrew Lawrence yesterday:
[…]”Are DM something for real use or future VO desgin”[…] (non-textual words)
An example Use Case (M. Louys) Is the source in this catalogue the same as the one in this other
catalogue? (Cross match)(Note: SkyNode? Discussion on specific “Column” Names? Standard DM for Catalogues? Or better, describe
specific columns in tables?)
![Page 5: European Space Astronomy Centre Pedro OSUNA Catalogue DM Subgroup Poona IVOA Sep 2004 IVOA Data Model group CATALOG(UE) Data Model progress P.Osuna.](https://reader036.fdocuments.in/reader036/viewer/2022082805/55149d05550346b2598b591a/html5/thumbnails/5.jpg)
European Space Astronomy CentrePedro OSUNACatalogue DM Subgroup Poona IVOA Sep 2004
First attempt Data Model
1
*
Galaxy Others
-ObsId-Start-End-CenterRa-CenterDec-Duration
Observation
-RA-DEC-L-B-RA_Error-DEC_Error
StcWcs
-Flux-FluxError-Likelihood-TotalCountRate-TotCountError
Quantity
Registry1 n
1
1
SolarFlare
-SrcIndex-IAUName-UniqueSrcno-Observation : Observation-Coordinates : StcWcs-PhysData : Quantity-Correlation : Source-Type
Source
-....
AstronomicalObject
-Date-Data : Quantity
AstronomicalEvent
-Name-Provenance-Curator-ProductionDate-RegistryData : Registry
Catalogue
-Provenance
CatalogueEntry
![Page 6: European Space Astronomy Centre Pedro OSUNA Catalogue DM Subgroup Poona IVOA Sep 2004 IVOA Data Model group CATALOG(UE) Data Model progress P.Osuna.](https://reader036.fdocuments.in/reader036/viewer/2022082805/55149d05550346b2598b591a/html5/thumbnails/6.jpg)
European Space Astronomy CentrePedro OSUNACatalogue DM Subgroup Poona IVOA Sep 2004
Conclusions
From A. Lawrence: “useable product now or future VO design” Model simple things firstGo for Source Catalogue Data Model, and see how it works. Then, review and decide.
For everyone: SEND inputs to Catalog(ue) DM subgroupREQUIREMENTS from other WGsFor chairman: ask M. Leoni to have subgroup discussions in twiki, while not in distribution lists