1. A PPARC funded project AstroGrid: new technology for the virtual observatory SC2004 Pittsburgh, PA November 2004 Guy Rixon AstroGrid Technical Architect University of Cambridge

2. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 2 But first......What is a Virtual Observatory? Dynamic collection of hardware, data and software working in harmony to solve arbitrarily large and complex astromonical problems.

3. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 3 Virtual Observatories: Unlocking new science Federating multi-λ data: Deep Field Surveys Nik Szymanek D. Ducros, ESA Link the X-ray and Opt/IR to understand energetic galaxies at the edge of the Universe NEP J1716.6+6708: an X-ray cluster at z=0.81: Chandra X-ray image (C. Mullis) overlaid on a deep BRI image (D. Clowe & G. Luppino).

4. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 4 Bridging communities Virtual observatory (VO) Desktop astronomy Web archives in astronomy Semantic web/grid HPC

5. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 5 AstroGrid’s position within VO VO Interactive exploration/ Experiment design Bulk processing/ Experiment execution AstroGrid’s emphasis

6. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 6 Bulk processing  workflow Hands-off operation Reproducible experiments Common, reusable procedures Everything is recorded Integrated with interactive system “Virtual grad student”

7. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 7 Components within AstroGrid Data grid Compute grid Workflow System Web portal Resource Registry

8. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 8 Web portal Basic controls in web browser… …linked to traditional displays on desktop.

9. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 9 Resource registry Description of all accessible resources: Services Applications Archive data-sets Follows IVOA standards Standard interface for queries Standard XML schemata for resource entries Standard “harvesting” between registries Metadata for: Humans Software agents

10. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 10 Workflow: Job Execution System

11. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 11 Data grid: DSA and MySpace Archive Data-selection Service User-writeable storage Processing 1Processing 2 Desktop

12. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 12 Compute grid: Common Execution Architecture Common Execution Connector Application as.exe file (local) Application as.exe file (grid) Common Execution Connector Application as HTTP service Common Execution Connector Application as Java class Common Execution Connector Web servicesLegacy/situated s/w JES Registry

13. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 13 What you get AstroGrid makes Java software for others to run. All our software is server-side We recommend other s/w suppliers for desktop components, e.g. Starlink, SAO Our services are web services Built with Apache Axis Run in Jakarta-Tomcat Delivered as web-archive (WAR) files. No user coding needed! AstroGrid software adapts to your legacy archive/application Highly configurable

14. 2004-11-12AstroGrid: new technology for the VO; SC2004, Pittsburgh PA Slide 14 Follow-up Our web site: http://www.astrogrid.org/ Beta testing Contact Nic Walton (naw@ast.cam.ac.uk) Component Deployment Data Centre MySpace Local Registry Community Contact Nic Walton Software cooperation MySpace Workflow Data Centre Registry metadata updating Contact Tony Linde (ael@star.le.ac.uk), Keith Noddle (ktn@star.le.ac.uk)