Cardiel López, NicolásJiménez Esteban, F. M.Alacid, J. M.Solano, E.Aberasturi, M.2023-06-202023-06-202011-110035-871110.1111/j.1365-2966.2011.19464.xhttps://hdl.handle.net/20.500.14352/44434© 2011 The Authors. © 2011 RAS. We would like to thank the anonymous referee for the careful reading of the manuscript and for her/his comments, which have helped to clarify this paper. This work was partially funded by the Spanish MICINN under the Consolider-Ingenio 2010 Program grant CSD2006-00070: First Science with the GTC.4 This work was also supported by the Spanish Programa Nacional de Astronomía y Astrofísica under grants AYA2008-02156 and AYA2009-10368, and by AstroMadrid under project CAM S2009/ESP-1496. This work has made use of ALADIN developed at the Centre de Données Astronomiques de Strasbourg, France.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.engjournal articlehttp://dx.doi.org/10.1111/j.1365-2966.2011.19464.xhttp://mnras.oxfordjournals.org/open access52CatalogVirtual Observatory ToolsAstrofísicaAstronomía (Física)Física atmosférica2501 Ciencias de la Atmósfera