A method for a rough reconstruction of line profiles from a series of narrow-band filtergrams

Computer Science – Performance

Scientific paper

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Absorption Spectra, Astronomical Spectroscopy, Data Reduction, Filtergrams, Line Shape, Optical Filters, Telescopes, Algorithms, Computer Techniques, Electrophotometry, Flare Stars, Signal Processing, Weighting Functions

Scientific paper

Azzarelli et al. (1979) have shown that high-resolution two-dimensional spectroscopy of active regions on the sun is feasible, using a photoelectrically guided computer controlled telescope provided with a high-performance tunable birefringent filter. In fact, with such an instrument it is possible to obtain a set of N filtergrams of the same active region by shifting the center of the passband along the profile of a strong absorption line. If the shape of the passband does not change, the true line profile can be recovered by conventional spectroscopic techniques. In the case where the shape of the passband does change, the true line profile can be still recovered, but the problem must be formulated in a more general way. In the present paper, such a mathematical formulation is presented.

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