Astrometry with Carte du Ciel plates, San Fernando zone - I. Digitization and measurement using a flatbed scanner

  title={Astrometry with Carte du Ciel plates, San Fernando zone - I. Digitization and measurement using a flatbed scanner},
  author={Belen Vicente and Carlos Abad and Francisco Garz{\'o}n},
  journal={Astronomy and Astrophysics},
Context. The historic plates of the Carte du Ciel , an international cooperative project launched in 1887, offers valuable first-epoch material for determining of absolute proper motions. Aims. We present an original method of digitizing and astrometrically reducing Carte du Ciel plate material using an inexpensive flatbed scanner, to demonstrate that for this material there is an alternative to more specialized measuring machines that are very few in number and thus not readily available. The… 

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