Italian center for Astronomical Archives (IA2, http://ia2.oats.inaf.it) is a national infrastructure project of the
Italian National Institute for Astrophysics (Istituto Nazionale di AstroFisica, INAF) that provides services for
the astronomical community. Besides data hosting for the Large Binocular Telescope (LBT) Corporation, the
Galileo National Telescope (Telescopio Nazionale Galileo, TNG) Consortium and other telescopes and instruments,
IA2 offers proprietary and public data access through user portals (both developed and mirrored) and
deploys resources complying the Virtual Observatory (VO) standards. Archiving systems and web interfaces are
developed to be extremely flexible about adding new instruments from other telescopes. VO resources publishing,
along with data access portals, implements the International Virtual Observatory Alliance (IVOA) protocols
providing astronomers with new ways of analyzing data. Given the large variety of data flavours and IVOA standards,
the need for tools to easily accomplish data ingestion and data publishing arises. This paper describes
the VO-Dance tool, that IA2 started developing to address VO resources publishing in a dynamical way from
already existent database tables or views. The tool consists in a Java web application, potentially DBMS and
platform independent, that stores internally the services' metadata and information, exposes restful endpoints to
accept VO queries for these services and dynamically translates calls to these endpoints to SQL queries coherent
with the published table or view. In response to the call VO-Dance translates back the database answer in a VO
compliant way.

The VO-Dance web application at the IA2 data center

A generalization of the Theoretical Spectral Access Protocol (TSAP) standard called Simple Self-described Service Protocol (S3P) has been used to search and access stellar model data. In particular, a Web server has been implemented that searches for synthetic isochrones and tracks computed using the FRANEC code and stored inside the BaSTI (a Bag of Stellar Tracks and Isochrones) relational database. The S3P allows an easy creation of a VO service for a collection of micro-simulations: this protocol is able to provide information about which parameters can be queried and which values are available and, as a second step, makes a viable query to the database using the parameters chosen by the user. The collection of tracks and isochrones is returned as a standard VOTable. We implemented this self-describing service for opening the VO door to the micro-simulations. In the future we will also implement it for the BaSTI Web tools (an isochrones maker and track interpolation program, a luminosity function program and a synthetic CMD code) to give them more visibility to the scientific community and to allow easier comparisons between various simulations and/or between observations and theoretical models. This project is developed within the Italian Theoretical Virtual Observatory (ITVO) project as part of the Italian Virtual Observatory initiative (VObs.it) and in collaboration with Spanish Virtual Observatory.

Micro-simulations Inside the VO: the BaSTI Case

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Micro-simulations Inside the VO: the BaSTI Case