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- W3101474133 abstract "The 'Bonn University Simultaneous CAmera (BUSCA) is a CCD camera system which allows simultaneous direct imaging of the same sky area in four colors. The optics are designed for an f/8 gem and four 4K X 4K CCDs with 15(mu) pixels covering a field of view of 12 arcmin X 12 arcmin at a 2m class telescope. In September 1998 BUSCA has seen 'First Light'. The instrument is based on three dichroic beam splitters which separate optical wavelength bands such that standard astronomical intermediate-band filter systems can be used. The dichroics are made of plane-parallel glass plates mounted at an angle of 45 degrees. Astigmatism in the transmitted beams is completely canceled by identical plane- parallel glass plates of suitable orientation. BUSCA offers new perspectives in astronomical multicolor photometry: i) The broadband spectral properties of astronomical objects in the optical can be determined with high reliability even in non-photometric atmospheric conditions. ii) Precious observing time is used very efficiently. iii) With the large field of view, extended objects like globular and open star clusters or galaxies are covered in a single exposure. iv) Each exposure results in a complete data set." @default.
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- W3101474133 date "1999-04-27" @default.
- W3101474133 modified "2023-09-27" @default.
- W3101474133 title "<title>BUSCA: a telescope instrumentation for simultaneous imaging in four optical bands</title>" @default.
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- W3101474133 doi "https://doi.org/10.1117/12.347066" @default.
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