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a Virtual Survey System AstroWise- OmegaCAM – Lofar – Euro-VO

a Virtual Survey System AstroWise- OmegaCAM – Lofar – Euro-VO. Edwin A. Valentijn. statement. Big steps with small groups of people serve individual research groups don’t set out to heal the world sociology Astronomers and very large db 1989 ESO-LV 30.000 images Work station

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a Virtual Survey System AstroWise- OmegaCAM – Lofar – Euro-VO

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  1. a Virtual Survey System AstroWise- OmegaCAM – Lofar – Euro-VO Edwin A. Valentijn

  2. statement • Big steps with small groups of people • serve individual research groups • don’t set out to heal the world • sociology • Astronomers and very large db • 1989 ESO-LV 30.000 images • Work station • Sloan Digital Sky Survey– MicroSoft Research • AstroWISE – Euro VO

  3. VST

  4. OmegaCAM Detectors • Science array 1 x 1 degree, 32 CCDs • 15 mm pixels – 0.21 arcsec/pixel • Marconi (former EEV) 2k x 4k= 8 Mpix • 16k x 16k pixels = 256 Mpix • Auxiliary CCD’s – 4 CCDs • For guiding • Image analysis

  5. Paranal Mid 2005 + 3 year

  6. Lofar IBM- Blue Gene/L

  7. Handling of the data is non-trivial • Pipeline data reduction • Calibration • Image comparisons/combinations • source lists / catalogues • Visualization • Science can only be archive based Large Data Volume • Wide-field imaging = vast amounts of data • VST maps equivalent of Southern sky in 3 years 30 min exp, 300 nights/y. 100 Tbyte image data Tbytes source list data

  8. ASTRO-WISE Mission Virtual Survey System • Environment that provides systematic and controlled • Access to all raw and calibration data • Execution and modification image/calibration pipelines • Execution of source extraction algorithms- catalogues • Archiving or regenerate dynamically • federated to link different data centers • Dynamical archive continuously grows -- small or large science projects • generating and checking calibration data • sharing methods, scripts raw pixel data  pipelines/cal files  catalogues

  9. New technologies-paradigm • raw data centralized – on the fly reprocessing • sociology- project management • ++ • Python • parallel – IP - seti@home • user tunable pipelines • ++ db • 5 LS – 5 lines script

  10. development issues • Indexing Terabytes on the sky • Associating entries • World wide linking entries (referencing) - registries • Filtering • Visualisation - imaging • Visualisation -multidimensional data • VO world

  11. VST - Virtual Survey Telescope

  12. Tbyte source lists brains make the associations Link -lists as fast as possible

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