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Building a VO-compliant Radio Astronomical DAta Model for Single-dish radio telescopes (RADAMS)

Abstract

The Virtual Observatory (VO) is becoming the de-facto standard for astronomical data publication. However, the number of radio astronomical archives is still low in general, and even lower is the number of radio astronomical data available through the VO. In order to facilitate the building of new radio astronomical archives, easing at the same time their interoperability with VO framework, we have developed a VO-compliant data model which provides interoperable data semantics for radio data. That model, which we call the Radio Astronomical DAta Model for Single-dish (RADAMS) has been built using standards of (and recommendations from) the International Virtual Observatory Alliance (IVOA). This article describes the RADAMS and its components, including archived entities and their relationships to VO metadata. We show that by using IVOA principles and concepts, the effort needed for both the development of the archives and their VO compatibility has been lowered, and the joint development of two radio astronomical archives have been possible. We plan to adapt RADAMS to be able to deal with interferometry data in the future.

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  1. 1.

    amiga.iaa.csic.es

  2. 2.

    http://www.iram-institute.org/

  3. 3.

    http://www.ivoa.net/Documents/VOTable/

  4. 4.

    As of this writing, the Simple Spectral Lines data model is in the Request For Comments (RFC) phase, and if no negative responses are presented, will be promoted the Recommendation status [18] as soon as revised draft, taking into account the comments provided during the RFC, is submitted to the IVOA’s Executive committee.

  5. 5.

    Incidentally, there is no existing data model yet for images or for more complex data within the VO, beyond what is available from FITS conventions.

  6. 6.

    Other policies of interest for an astronomical archive, but outside of the scope of the VO, might involve data erasure, replication, or billing.

  7. 7.

    An example of very user oriented policy can be found at ESO, where certain datasets are only accessible by users who are registered as belonging to an ESO member state.

  8. 8.

    In the case of the Robledo Archive, the policy implemented was the standard NRAO policy: 18 months since the end of the observations.

  9. 9.

    In a generalisation of the RADAMS to radio interferometry, aditional locations would have to be applied to each individual Antenna, or an array of locations applied to the AntennaConf.

  10. 10.

    Other formats, such as JPEG previews (possibly including Astronomical Visualization Metadata, http://www.ivoa.net/Documents/latest/AOIMetadata.html), or CSV values, are technically possible.

  11. 11.

    https://tapas.iram.es/tapas/

  12. 12.

    http://sdc.cab.inta-csic.es/robledo/

  13. 13.

    http://iram.fr/IRAMFR/ARN/sep09/node4.html

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Acknowledgements

The authors acknowledge support from Spanish DGI Grants AYA 2005-07516-C02-01, AYA 2005-07516-C02-02, AYA2008-06181-C02, and Junta de Andalucía grant P08-FQM-4205-PEX. They also acknowledge support from the Spanish Virtual Observatory (through grants AYA2005-24102-E and AYA 2008-02156) for useful discussions and travel support for IVOA InterOp meetings. They are also grateful for input provided by José Francisco Gómez (IAA), Raúl Gutiérrez (CAB), Óscar Morata (CAB), Carlos Rodrigo-Blanco (CAB), and Tom Kuiper (JPL) which helped making RADAMS better.

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Correspondence to Juan de Dios Santander-Vela.

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de Dios Santander-Vela, J., García, E., Leon, S. et al. Building a VO-compliant Radio Astronomical DAta Model for Single-dish radio telescopes (RADAMS). Exp Astron 34, 623–652 (2012). https://doi.org/10.1007/s10686-012-9302-5

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Keywords

  • Astronomical databases: miscellaneous
  • Virtual observatory tools