1 / 23

Report WP4

Report WP4. Theory in the Virtual Observatory. WP4 objectives and description of work. Assess the inclusion of theory data and services in the Virtual Observatory Theory Expert Group yearly meetings and email discussions establish a framework for the inclusion of theory in the VObs.

eljah
Download Presentation

Report WP4

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Report WP4 Theory in the Virtual Observatory Gerard Lemson, PhD

  2. WP4 objectives and description of work • Assess the inclusion of theory data and services in the Virtual Observatory • Theory Expert Group • yearly meetings and email discussions • establish a framework for the inclusion of theory in the VObs. • organizes workshop Gerard Lemson, PhD

  3. WP4 milestones, deliverables, expected results • WP4-D10: Euro-VO Theory Workshop • WP4-D11: TEG Report: Framework for inclusion of Theoretical Astronomy Services in the VObs • Motivation of the European Theoretical astronomy community to participate in the VObs Gerard Lemson, PhD

  4. Special attention to theory in VObs • Existing protocols not applicable, observationally biased • Data models insufficient • Archiving generally ad hoc • No existing standardisation, no “FITS for simulations” • New use cases Gerard Lemson, PhD

  5. Theory in IVOA Theory Interest Group • Inspired by whitepaper, Theory in the Virtual Observatory (Lemson & Colberg, 2004) • Charter • Provide a forum for discussing theory specific issues in a VO context • Incorporate standard approaches when designing and implementing services on theoretical archives • Define standard services relevant for theoretical archives • Promote development of services for comparing theoretical results to observations Gerard Lemson, PhD

  6. Theory Experts Group (TEG) • Members: • Santi Cassisi (INAF), Miguel Cervińo (INTA), Gerard Lemson (MPG, chair), Pedro Osuna (ESAC), Joop Schaye (NOVA), Nic Walton (LU), Hervé Wozniak (CNRS) • SAC workshop • Co-authors whitepaper • Theory Sections in DCA census questionnaire Gerard Lemson, PhD

  7. Workshop planning • Garching, 7-9 April 2008 • Back-to-back with WP5 (9-11 April) • sharing resources, organisation • expectation large overlap in interest of participants • About 30 invited (and financed) speakers • Sessions: • Intro to VO; Data formats; Micro-simulations; SNAP simulations; Theory-VO for observers; Other subjects; TVO and Grid; Discussion Gerard Lemson, PhD

  8. Whitepaper Framework for inclusion of theory data in the VO • Incorporate experience from developments in IVOA • Incorporate experience from actual TVO efforts in partners and outside (see later) • Incorporate results of DCA census where theory is involved (in progress) • First rough draft outline online • Further work Jan 2008 Gerard Lemson, PhD

  9. Other WP4 activities • TIG sessions IVOA interoperability meetings, Beijing (May 2006) and Cambridge, UK (Oct 2007) • Euro-VO DCA/IVOA workshop Garching (next) • Partner efforts (later) Gerard Lemson, PhD

  10. DCA/IVOA workshop on SNAP • Get active people working on SNAP project (see next) together to discuss status and divide work • Participants all from Euro-VO DCA partners, other IVOA members absent • Agreed on layout model and protocol and volunteers to validate this Gerard Lemson, PhD

  11. Simple Numerical Access Protocol (SNAP) • Goal: define framework for including large simulations in VObs • Define a standard protocol for discovering and retrieving 3D simulations similar to Simple Image/Spectra access protocols. • Based on a model for meta-data describing simulations • Propose as standard to IVOA • Create prototype implementations Gerard Lemson, PhD

  12. SNAP data model • World of simulations much more heterogeneous than observations • Model needs to be explicit about observables etc • Highly hierarchical • Important features: • target objects and processes (what is simulated) • method of representating the world • algorithms • etc Gerard Lemson, PhD

  13. SNAP protocol • Complex model, consequently hard to define simple, SxAP-like protocol • No simple HTTP GET string • Data LARGE • Data formats non standardised • Implementation protocol with useful/required functionality complex • Browsing/drill-down functions, ADQL • Subset-selection functionality (cut-out, projection) • Custom services Gerard Lemson, PhD

  14. SNAP registry/portal • Propose centralised SNAP registry • CNRS, INAF, MPG, NVO promise implementation • Approved in IVOA meetings and work is ongoing Gerard Lemson, PhD

  15. Efforts CNRS • Laurent Bourgès hired • Collaborate on SNAP design • SNAP validation on various theory databases (next page) • Test SNAP data model for other, non-SNAP simulations (“micro-physics”) • Meeting theory WG FVO, June 2007, Lyon • discussed applicability Characterisation DM for SNAP Gerard Lemson, PhD

  16. Gerard Lemson, PhD

  17. Gerard Lemson, PhD

  18. Efforts INAF 1 • Created prototype database structure to store the metadata of different types of cosmological simulations • Developed services such as: • interactive cutout (using graphical tools) from cosmological simulation • creation on-the-fly of profiles for ten quantities for simulated galaxy clusters • creation of XML tables that will become VOTables when the new Uniform Content Descriptor (UCD) for theory data will become an IVOA standard • connection to the Aladin tool, to allow loading and displaying simulated galaxy cluster maps • Work on validation, through the database structure defined above, of the data model for theory data being defined within the IVOA Theory Interest Group Gerard Lemson, PhD

  19. Efforts INAF 2 • Assess the feasibility of including different sets of theory data and services in the VObs. (OATeramo and OATrieste). • Uses BaSTI database, of stellar evolution tracks and isochrones computed with the FRANEC code. • A database schema has been designed to store the metadata of this kind of simulations and is being implemented as a demonstrator. Gerard Lemson, PhD

  20. Gerard Lemson, PhD

  21. Efforts MPG • SNAP model design: UML, XML • SNAP portal implementation prototype (in progress) • Theory services • Millennium database • ~ 200 registered users • ~ 3.5 million queries (since 8/2006) • > 32 billion rows retrieved (since (3/2007) • ~40 papers (S. White) • Visualisation hydro simulations (Grid) • Assisted in SSA publication theoretical PN spectra (Rauch et al) Gerard Lemson, PhD

  22. Gerard Lemson, PhD

  23. Next steps • Workshop (7-9 April 2008) • invitations and announcement next weeks • Whitepaper 1st draft • to be discussed at workshop • Proposals to IVOA (interops May/October) • SNAP (Lemson & Gheller), • Semantics (LePetit) • Micro-simulations (Cervino) Gerard Lemson, PhD

More Related