Canadian Virtual Observatory David Schade Canadian Astronomy Data Centre Pat Dowler, Daniel Durand, Luc Simard, Norm Hill, Severin Gaudet

Virtual Observatories: June 10-14, 2002 Canadian Virtual Observatory The Canadian Virtual Observatory is a reality –IT WORKS –CVO is funded by National Research Council Canada and the Canadian Space Agency $4.3 million over 3-5 years –Design: Working CVO architecture –Content: WFPC2 associations pipeline, 12,000 images and 18.6 million sources

Virtual Observatories: June 10-14, 2002 CVO system components User interface –Database exploration with constraints API based on JAVA/JINI –Others could use our API to access our system effectively Content –WFPC2 images and catalogues CADC infrastructure –Database servers –Processing –Storage –Web servers

Virtual Observatories: June 10-14, 2002 VoPix VoProc VoSrc VO Architecture Archive Web interface to archive Archives publish to the VO Pat Dowler at ADASS

Virtual Observatories: June 10-14, 2002 VoPix VoProc VoSrc VO Architecture An idealized representation of pixel data free from archive-specific descriptors Instances of processing Classes of processing Source measurements free from archive-specific descriptors

Virtual Observatories: June 10-14, 2002 Drill down Scientists must be able to drill down from a catalogue entry: –Processing details –Pixels –Input parameters –Raw pixels Measurements reproducible Data integrity –Data Verification procedures –Online documentation –Refereed publications VO Architecture

Virtual Observatories: June 10-14, 2002 VoObj Object catalogues combine multi- wavelength sources into an object identification Production of object catalogues is a science process. The master object catalogue is a representation of the state of our astrophysical knowledge. Science Project VO Architecture Object catalogues

Virtual Observatories: June 10-14, 2002 VO Architecture Pixels sample Energy Space Time Processing table links back to archive

Virtual Observatories: June 10-14, 2002 VO Architecture Source Table

Virtual Observatories: June 10-14, 2002 WFPC2 associations, stacks, source catalogues What we have now –12,300 stacks in 6 filters –18.6 million sources What we will have this year –25,000 stacks –30 million sources –Object catalogues Content

Virtual Observatories: June 10-14, 2002 WFPC2 catalogues Sextractor (Bertin) for object detection/photometry

Virtual Observatories: June 10-14, 2002 How do we do it WFPC2 associations (ST-ECF/CADC collaboration) New storage/processing environment –20 AMD 1.5 GHz for processing –18 Terabytes for storage We can do 25,000 stacks and extract 30 million sources in a few weeks Processing and storage hardware

Virtual Observatories: June 10-14, 2002 Future CVO : this year CVO Prototype released to the public July 15 Release CVO Phase II near the end of 2002 –Add 2MASS catalogues Explore inter-operability prototype (2MASS) Explore ACS collaboration with STScI, ST-ECF, CADC Increase WFPC2 content –25,00 stacked images –30 million sources with high-quality imaging Object Catalogues

Virtual Observatories: June 10-14, 2002 Future CVO Develop the functionality of the CVO Link with other interesting pixel/catalogue datasets Generate more high-quality VO content CFHT Legacy Surveys –Partnership with CFHT,TERAPIX, CDS –Science: Supernovae, Weak Lensing, Kuiper Belt –500 nights/5years: Wide and deep components –50 million objects with high-quality imaging –Processed image products and catalogues –100 Terabyte project CFHT Legacy Surveys