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Optimal Combination of Sub-Stepped Spectra
J. R. Walsh and L. B. Lucy
Space Telescope European Coordinating Facility,
European Southern Observatory, Karl-Schwarzschild-Strasse 2,
D-85748 Garching bei München, Germany
[1]Affiliated to Astrophysics Division, Space Science
Department, European Space Agency
Abstract:
The small aperture of the GHRS projects to just one detector diode. In order
to achieve adequate sampling, the data are sub-stepped in half or
quarter diode steps. Using the Richardson-Lucy algorithm,
optimal combination of these sub-stepped spectra can be achieved in
order to regain resolution. The technique, which can be generally
applied to spectra which are undersampled by the detector, is
described and some examples are shown.