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10 July 2008 Investigation of residual blaze functions in slit-based echelle spectrograph
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Abstract
We have studied the Residual Blaze Functions (RBF) resulting from division of individual echelle orders by extracted flat-field in spectra obtained by slit-fed OES spectrograph of 2m telescope of Ondrejov observatory, Czech Republic. We have eliminated the dependence on target and observation conditions by semiautomatic fitting of global response function, thus getting the instrument-only dependent part, which may be easily incorporated into data reduction pipeline. The improvement of reliability of estimation of continuum on spectra of targets with wide and shallow lines is noticeable and the merging of all orders into the one long spectrum gives much more reliable results.
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Petr Škoda, Brankica Šurlan, and Sanja Tomić "Investigation of residual blaze functions in slit-based echelle spectrograph", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70145X (10 July 2008); https://doi.org/10.1117/12.789284
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