The most important advantage of widefield cameras is, precisely, the "widefield", since this offers the observers the possibility of obtaining vast amounts of data in a much shorter observing time. However, for a reliable data interpretation, it is necessary a proper data calibration. Concerning the flatfielding of images, many times it is required to obtain several integrations in blank regions (sky patches without bright sources) nearby to the science target areas.
TESELA is a service developed to provide access to a catalogue of blank regions, based on the application of the Delaunay triangulation of the sky. The present implementation of TESELA uses as source for the star coordinates the Tycho-2 Catalogue (Hog et al. 2000), or the USNO_B Catalgue (Moret et al. 2003).
Acknowledging TESELA in publications:
Please include the following in any published material that makes use of TESELA:
"This publication makes use of TESELA, partially funded by the Spanish MICINN under the Consolider-Ingenio 2010 Program grant CSD2006-00070: First Science with the GTC, and developed under the Spanish Virtual Observatory project supported from the Spanish MICINN through grants AyA2008-02156, AyA2011-24052."
Referencing TESELA in publications:
If your research benefits from the use of TESELA, please include the following reference in your publication:
Tycho-2 BFs: "Cardiel, N., Jiménez-Esteban, F.M., Alacid, J.M., Solano, E., & Aberasturi, M. 2011, MNRAS, 417, 3061"
USNO-B DBFs: "Jiménez-Esteban, F.M., Cabrera-Lavers, A., Cardiel, N. & Alacid, J.M. 2012, MNRAS, 427, 679"
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