The Mid-Infrared Instrument for theJames Webb Space Telescope, IV: The Low-Resolution Spectrometer

2015/06/16 by S. Kendrew, Sarah Kendrew, Silvia Scheithauer +33 · 124 citations
Engineering · Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Calibration and Measurement Techniques #Engineering #Exoplanet #Geology #James Webb Space Telescope #Optics #Physics #Remote sensing #Spectral line #Spectral resolution #Spectrometer #Spectroscopy #Spitzer Space Telescope #Stars #Stellar, planetary, and galactic studies #Telescope #Transit (satellite) #astro-ph.IM

paper · pdf · doi:10.1086/682255

published in Publications of the Astronomical Society of the Pacific 127(953), 623-632 (Institute of Physics) · published in PASP, vol. 127, issue 953, pp.623-632, 2015

openalex publication_date 2015/06/16 · arxiv created 2015/12/09 · arxiv updated 2015/12/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The low-resolution spectrometer of the MIRI, which forms part of the imager module, will provide R ∼ 100 long-slit and slitless spectroscopy from 5 to 12 μm. The design is optimized for observations of compact sources, such as exoplanet host stars. We provide here an overview of the design of the LRS, and its performance as measured during extensive test campaigns, examining in particular the delivered image quality, dispersion, and resolving power, as well as spectrophotometric performance, flatfield accuracy, and the effects of fringing. We describe the operational concept of the slitless mode, which is optimally suited to transit spectroscopy of exoplanet atmospheres. The LRS mode of the MIRI was found to perform consistently with its requirements and goals.

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