DS3 progress and science requirements Feb 2006

Progress

ACR (AstroGrid Client Runtime) release. Once the AstroGrid workbench has been installed, the user can execute scripts in a variety of common languages (perl, python etc.) which can themselves run any suitable command-line or UI service (e.g. resource search, analysis tool, Aladin...). Also see this Tutorial.

The current release of the AstroGrid Workbench Workflow Builder offers a wide range of resources.

See also PLAStic (DS6).

Requirements

Taken from material prepared for Nic's ADASS talk

IMF of massive stars

• Stellar catalogues are large, as are models; e.g.
  • CMFGen typically 5E+8 spectral data points per population parameter set for O-stars
    • VO provides model generation, selective/smoothed/clustered visualisation (e.g. to steer AstroNeural) assesment of goodness-of-fit without excessive movement/downloads of massive data sets.
• Need to search multi-wavelength archives (radio to X-ray)
  • Images, data cubes and spectra
  • Resource broker, liaise with data providers for efficient cross-matching of massive catalogues, apply more sophisticated registration and cross-ID tools e.g. SpecFiind

Galaxy clustering

• Very large sky areas (tens degrees) at multiple resolution scales
  • Complex parameter space (redshift as well as location)
• Multi-wavelength data, phenomena of interest have different structures in different regimes
  • Variety of multi-dimensional pattern-recognition methods e.g. VisIVO
  • Generate models for comparison
    • Facilitiate integrating and driving tools

Infrastructure implications

• AstroGrid Client Runtime (ACR) and PLASTIC
  • Access to local tools and services integrated into all VO resources
    • Independent of their native languages, platforms
  • Scripted in any of several common languages (python, perl, etc.).
• Exchange of data between packages via MySpace/VOStore
  • e.g. model generation v. cross-matched observational SEDs, assessment of results using statistical package, visualisation.
• Workflow building and editing
  • Daisy-chain multiple steps
  • User defines conditions for e.g.
    • Data selection
    • Tweaking iterative refinement of models
  • Asynchronous
    • Including suspend points to wait for human steering
  • Interactive and automated use of spectral tools (SpecView, VOSpec, 3D...)
• DSA to help data providers interact with AstroScope for efficient data discovery
  • Registry
  • Use of data models in selecting data to feed to tools
• VOTechBroker needed to allocate
  • Computational power
  • Bulk virtual storage (VOStore)
• Single sign-on
  • Resource allocation
  • Security
    • System protection
    • Restricted data
  • Consortia
• International collaborations/distributed data and resources
  • Direct movement of data between VOStores

-- AnitaRichards - 08 Feb 2006