Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-11-06
Astronomy and Astrophysics
Astrophysics
15 pages, 12 PS-figures, accepted to Bull. SAO, 2002, v.54
Scientific paper
The algorithms used for reduction of data obtained in a Fabry-Perot interferometer mode of the new focal reducer of the 6m telescope SCORPIO are described. The main attention is focused on the procedures of photometry correction of channels and night sky emission subtraction, which is especially important for observations with a CCD in comparison with a photon counter. The influence of various sources of errors on measurements of radial velocities in a data cube is investigated. Examples of velocity field construction by using emission lines in the galaxy NGC 6951 and absorption lines in the globular cluster M 71 are presented.
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