tesela: a new Virtual Observatory tool to determine blank fields for astronomical observations

Authors

  • N. Cardiel,

    Corresponding author
    1. Departamento de Astrofísica y CC. de la Atmósfera, Facultad de Ciencias Físicas, Avenida Complutense s/n, E-28040 Madrid, Spain
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  • F. M. Jiménez-Esteban,

    1. Departamento de Astrofísica, Centro de Astrobiología (INTA-CSIC), PO Box 78, Villanueva de la Cañada, E-28691 Madrid, Spain
    2. Spanish Virtual Observatory, Spain
    3. Saint Louis University, Madrid Campus, Division of Science and Engineering, Avenida del Valle 34, E-28003 Madrid, Spain
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  • J. M. Alacid,

    1. Departamento de Astrofísica, Centro de Astrobiología (INTA-CSIC), PO Box 78, Villanueva de la Cañada, E-28691 Madrid, Spain
    2. Spanish Virtual Observatory, Spain
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  • E. Solano,

    1. Departamento de Astrofísica, Centro de Astrobiología (INTA-CSIC), PO Box 78, Villanueva de la Cañada, E-28691 Madrid, Spain
    2. Spanish Virtual Observatory, Spain
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  • M. Aberasturi

    1. Departamento de Astrofísica, Centro de Astrobiología (INTA-CSIC), PO Box 78, Villanueva de la Cañada, E-28691 Madrid, Spain
    2. Spanish Virtual Observatory, Spain
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E-mail: cardiel@fis.ucm.es

ABSTRACT

The observation of blank fields, regions of the sky devoid of stars down to a given threshold magnitude, constitutes one of the typical important calibration procedures required for the proper reduction of astronomical data obtained in imaging mode. This work describes a method, based on the use of the Delaunay triangulation on the surface of a sphere, that allows for easy generation of blank-field catalogues. In addition to that, a new tool named tesela, accessible through the Internet, has been created to facilitate the user to retrieve, and visualize using the Virtual Observatory tool aladin, the blank fields available near a given position in the sky.

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