Generalized sky coverage for adaptive optics and interferometry

Details Generalized sky coverage for adaptive optics and interferometry Generalized sky coverage for adaptive optics and interferometry

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5490..331s&link_type=abstract

Advancements in Adaptive Optics. Edited by Domenico B. Calia, Brent L. Ellerbroek, and Roberto Ragazzoni. Proceedings of the SPI

Physics

Optics

Scientific paper

Sky coverage is an important item for a large number of techniques using stars as a reference, for example as guide stars for Adaptive Optics or for phase referencing in Interferometry. Models of the stellar distribution within our galaxy allow for reasonable estimates of the sky coverage under certain conditions, but these models do not give the detailed description that can only be obtained using observations. The newest generation star catalogues, like the USNO-B1.0 catalog in the visible wavelength band and the 2MASS catalog in the near-IR enable the exact determination of the sky coverage for a given requirement and location on the sky. Based on the above two catalogs the sky coverage as a function of parameters like limiting magnitude, number of guide stars and color was determined as a function of the location. In the context of the Multi Unit Spectroscopic Explorer (MUSE), a second generation instrument for the VLT which is currently being developed, the sky coverages for a number of potential targets--both progenitors of normal nearby galaxies at very high redshift, as found in deep fields like HDF-South and FORS deep field as well as nearby normal, starburst and interacting galaxies--were determined as illustrating examples.

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