2,496 research outputs found
Planetary Science Virtual Observatory architecture
In the framework of the Europlanet-RI program, a prototype of Virtual
Observatory dedicated to Planetary Science was defined. Most of the activity
was dedicated to the elaboration of standards to retrieve and visualize data in
this field, and to provide light procedures to teams who wish to contribute
with on-line data services. The architecture of this VO system and selected
solutions are presented here, together with existing demonstrators
Atlasmaker: A Grid-based Implementation of the Hyperatlas
The Atlasmaker project is using Grid technology, in combination with NVO
interoperability, to create new knowledge resources in astronomy. The product
is a multi-faceted, multi-dimensional, scientifically trusted image atlas of
the sky, made by federating many different surveys at different wavelengths,
times, resolutions, polarizations, etc. The Atlasmaker software does resampling
and mosaicking of image collections, and is well-suited to operate with the
Hyperatlas standard. Requests can be satisfied via on-demand computations or by
accessing a data cache. Computed data is stored in a distributed virtual file
system, such as the Storage Resource Broker (SRB). We expect these atlases to
be a new and powerful paradigm for knowledge extraction in astronomy, as well
as a magnificent way to build educational resources. The system is being
incorporated into the data analysis pipeline of the Palomar-Quest synoptic
survey, and is being used to generate all-sky atlases from the 2MASS, SDSS, and
DPOSS surveys for joint object detection.Comment: Published in the Proceedings of ADASS XI
Science with the Virtual Observatory: the AstroGrid VO Desktop
We introduce a general range of science drivers for using the Virtual
Observatory (VO) and identify some common aspects to these as well as the
advantages of VO data access. We then illustrate the use of existing VO tools
to tackle multi wavelength science problems. We demonstrate the ease of multi
mission data access using the VOExplorer resource browser, as provided by
AstroGrid (http://www.astrogrid.org) and show how to pass the various results
into any VO enabled tool such as TopCat for catalogue correlation. VOExplorer
offers a powerful data-centric visualisation for browsing and filtering the
entire VO registry using an iTunes type interface. This allows the user to
bookmark their own personalised lists of resources and to run tasks on the
selected resources as desired. We introduce an example of how more advanced
querying can be performed to access existing X-ray cluster of galaxies
catalogues and then select extended only X-ray sources as candidate clusters of
galaxies in the 2XMMi catalogue. Finally we introduce scripted access to VO
resources using python with AstroGrid and demonstrate how the user can pass on
the results of such a search and correlate with e.g. optical datasets such as
Sloan. Hence we illustrate the power of enabling large scale data mining of
multi wavelength resources in an easily reproducible way using the VO.Comment: 8 pages; 7 figures; proceedings of invited talk at "Multi wavelength
astronomy and the Virtual Observatory" conference, December 2008, EuroVO-AIDA
program, European Space Astronomy Centre, Spai
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