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Virtual Observatory & LIGO

Virtual Observatory & LIGO. Roy Williams California Institute of Technology. IVOA is a standards organization. VO Standards. Simple Cone Search Simple Image Access Simple Spectral Access Space-Time Coordinate Metadata Spectral Data Model Unified Content Descriptors

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Virtual Observatory & LIGO

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  1. Virtual Observatory& LIGO Roy WilliamsCalifornia Institute of Technology

  2. IVOA is a standards organization

  3. VO Standards Simple Cone Search Simple Image Access Simple Spectral Access Space-Time Coordinate Metadata Spectral Data Model Unified Content Descriptors Vocabularies in the Virtual Observatory VOTable Format Specification Sky Event Reporting Metadata (VOEvent) Table Access Protocol Astronomical Data Query Language VOSpace Authentication Mechanisms Asynchronous Service Pattern IVOA Support Interfaces IVOA Identifiers Registry Interfaces VOResource: Registry Record VOResource Schema Extension fetch data by sky position data models semantics data exchange relational/region queries service infrastructure registry

  4. Virtual Observatory • model: survey owners make their own VO service • + new VO-hosted repository if funded • sharing: • standard services form data grid • VO registry • connections to literature • analysis: • old tools refitted + new tools in cloud • everyone wants something different • publication: • connection with journals+data, ADS and semantics • preservation: • responsibility is with data centers • they hate making good metadata

  5. Virtual Observatory • organization: through standard services and VO registry, service validation • users: more people using surveys for publication • institutions: astronomy data centers • IPAC, STSCI, HEASARC, etc • new communities: don't like standard services (too complex, too simple) • standards: http://ivoa.net/Documents/ • US project: http://us-vo.org/

  6. LIGO • Laser Interferometric Gravitational Wave Observatory • to detect the gravitational waves (GW’s) predicted by Einstein’s general theory of relativity (GR). • NSF requirement for open data • but data is difficult to understand

  7. LIGO open data • size ~600 TB per year • plan is to work with OAIS • replication: • Hanford WA, Livingston LA, Pasadena CA, Milwaukee WI • analysis is not supported, rather "rich viewing” • preservation • getting the good metadata out of scientists heads • designated community • professional astronomers • educated layperson

  8. LIGO open data • sharing: VERY carefully. Data is very difficult to understand. • international: US Ligo with French/Italian Virgo. • Differences on open data question • new communities will have a steep learning curve! • other purposes: PEM channels • Seismometers Accelerometers Tiltmeters Magnetometers Microphones Radio receivers Weather stations • http://www.ligo.org/

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