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Partially Coherent Modelling of Few-Mode Post-Dispersed Fourier Transform Spectrometers

About: The article was published on 2021-01-01 and is currently open access. It has received None citations till now.
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TL;DR: A series of observations and the analysis conducted to determine the wavelength dependence of the SPIRE spectrometer beam profile are described.
Abstract: One of the instruments on board the Herschel Space Observatory is the Spectral and Photometric Imaging Receiver (SPIRE). SPIRE employs a Fourier transform spectrometer with feed-horn-coupled bolometers to provide imaging spectroscopy. To interpret the resultant spectral images requires knowledge of the wavelength-dependent beam, which in the case of SPIRE is complicated by the use of multimoded feed horns. In this paper we describe a series of observations and the analysis conducted to determine the wavelength dependence of the SPIRE spectrometer beam profile.

54 citations