Vertical Extinction on La Silla

Details Vertical Extinction on La Silla Vertical Extinction on La Silla

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977msngr..11....7t&link_type=abstract

Messenger, vol. 11, p. 7-8 (1977).

Astronomy and Astrophysics

Astronomy

55

Scientific paper

Among the many tactors that determine the quality ot an observatory site, two are crucial. These are the seeing (how much the light trom a ce/estial object is spread out during the passage through the Earth's atmosphere) and the extinction (how much the light is weakened during the passage). It has long been known that La Silla is among the best sites in the world what concerns seeing but it is only recently that a major study has revealed that the La Silla extinction is very small on good nights. Dr. H. Tüg trom the Astronomical Institute ot the Ruhr University in Bochum, FRG, spent several months on La Silla in 1974-76 with his "black-body" platinum oven which will still be remembered as the "new star" next to the water tanks, where the Swiss telescope is now situated. As a result ot his work, we can now give quantitative tigures tor the extinction at ESO.

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