The MOS Reduction Software - MRS

Year 2021, Volume: 2 Issue: 1, 21 - 27, 30.06.2021

Volkan Bakış

Abstract

An open source collection of computer programs has been developed and presented to the use of researchers to reduce the spectra taken with the multi-object spectrograph spectra used as the focal plane instrument of RTT150 telescope in the Tübitak National Observatory. Since the spectrograph has moving parts (i.e. grism, mask) and the pinholes on the mask are located at various locations with respect to dispersion axis, the spectrum produced in the focal plane is exposed to some effects such as order tilts and wavelength shifts. A dedicated algorithm has been applied to determine and correct order tilt and wavelength shifts to extract the spectra from different pinholes, which can provide the basis of a pipeline reduction for the Observatory. The geometric distortion on the observed spectrum is found to be negligible which eliminates the need for complex algorithms for aperture extraction.

Keywords

techniques: spectroscopic, techniques: image processing, Software

Thanks

Special thanks to Hicran BAKIŞ, Aytap SEZER and Günay PAYLI for making their MOS data available during the development of MRS.

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