What is a Virtual Observatory?
The Virtual Observatory is an international astronomical community-based initiative.
It aims to allow global electronic access to the available astronomical data archives
of space and ground-based observatories, sky survey databases. It also aims to enable
data analysis techniques through a coordinating entity that will provide common standards,
wide-network bandwidth, and state-of-the-art analysis tools.
VO Reality
It is now possible to have powerful and expensive new observing facilities at wavelengths
from the radio to the X-ray and gamma-ray regions. Together with advanced instrumentation
techniques, a vast new array of astronomical data sets will soon be forthcoming at all
wavelengths. These very large databases must be archived and made accessible in a systematic
and uniform manner to realise the full potential of the new observing facilities.
The Virtual Observatory aims to provide the framework for global access to the various
data archives by facilitating the standardisation of archiving and data-mining protocols.
The AVO will also take advantage of state-of-the-art advances in data-handling software
in astronomy and in other fields.
The Virtual Observatory initiative is currently aiming at a global collaboration of the
astronomical communities in Europe, North and South America, Asia, and Australia under the
auspices of the recently formed International Virtual Observatory Alliance.
New Paradigm for Researchers
Researchers must now turn to the GRID paradigm of distributed computing and
resources to solve complex, front-line research problems. To implement this
new paradigm, one has to join existing astronomical data centres and archives
into an interoperating and single unit. This new astronomical data resource
will form a Virtual Observatory (VO) so that astronomers can explore the digital
Universe in the new archives across the entire spectrum. Similarly to how a real
observatory consists of telescopes, each with a collection of unique astronomical
instruments, the VO consists of a collection of data centres each with unique
collections of astronomical data, software systems, and processing capabilities,
which will enable new science. The VO initiative is a global collaboration of the
world's astronomical communities under the auspices of the recently formed
International Virtual Observatory Alliance (IVOA).
The EURO-VO project aims at deploying an operational VO in Europe.
This builds on the development experience gained with its predecessor, the
Astrophysical Virtual Observatory project (AVO),
which conducted a research and demonstration programme on the scientific
requirements and technologies necessary to build a European VO. In coordination
with the European astronomical infrastructural networks
OPTICON and
RADIONET,
and through membership and support of the IVOA, EURO-VO will seek to obtain
the following objectives:
- technology take-up and full VO compliant data and resource provision
by astronomical data centres in Europe;
- support to the scientific community to utilise the new VO infrastructure
through dissemination, workshops, project support, and VO facility-wide
resources and services;
- building of an operational VO infrastructure in response to new scientific
challenges via development and refinement of VO components, assessment of new
technologies, design of new components and their implementation.
The EURO-VO project is open to all European astronomical data
centres. Initial partners include ESO,
the European Space Agency,
and six national funding agencies, with their respective VO nodes:
Istituto Nazionale di Astrofisica (INAF, Italy),
Institut National des Sciences de l'Univers (INSU, France),
Instituto Nacional de Tecnica Aeroespacial (INTA, Spain),
Nederlandse Onderzoekschool voor Astronomie (NOVA, Netherlands),
Particle Physics and Astronomy Research Council (PPARC, UK),
and Rat Deutscher Sternwarten (RDS, Germany).
The total planned EURO-VO resources sum up to approximately 60 persons/yr over three years, i.e.,
about three times those of the AVO.