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Advancements in Virtual Observatory Standards and LIGO Open Data: Enhancing Astronomical Research

The International Virtual Observatory Alliance (IVOA) is a pivotal organization developing standards for astronomical data access and sharing, including Simple Cone Search and VOTable formats. The Laser Interferometric Gravitational Wave Observatory (LIGO) plays a crucial role in gravitational wave research, producing 600 TB of data yearly. Open data practices are essential but challenging due to complexity. Balancing standardization with the needs of diverse user communities is key for improved metadata management and data sharing, fostering better collaboration in astronomy and astrophysics.

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Advancements in Virtual Observatory Standards and LIGO Open Data: Enhancing Astronomical Research

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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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