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Proceedings Paper

Wavelength calibration of the JWST-MIRI medium resolution spectrometer
Author(s): J. R. Martínez-Galarza; A. M. Glauser; A. Hernán-Caballero; R. Azzollini; A. Glasse; S. Kendrew; B. Brandl; F. Lahuis
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Paper Abstract

We present the wavelength and spectral resolution characterisation of the Integral Field Unit (IFU) Medium Resolution Spectrometer for the Mid-InfraRed Instrument (MIRI), to fly onboard the James Webb Space Telescope in 2014. We use data collected using the Verification Model of the instrument and develop an empirical method to calibrate properties such as wavelength range and resolving power in a portion of the spectrometer's full spectral range (5-28 μm). We test our results against optical models to verify the system requirements and combine them with a study of the fringing pattern in the instrument's detector to provide a more accurate calibration. We show that MIRI's IFU spectrometer will be able to produce spectra with a resolving power above R = 2800 in the wavelength range 6.46 - 7.70 μm, and that the unresolved spectral lines are well fitted by a Gaussian profile.

Paper Details

Date Published: 10 August 2010
PDF: 12 pages
Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77313Q (10 August 2010); doi: 10.1117/12.856840
Show Author Affiliations
J. R. Martínez-Galarza, Leiden Observatory, Leiden Univ. (Netherlands)
A. M. Glauser, Institute of Astronomy, ETH Zurich (Switzerland)
UK Astronomy Technology Ctr. (United Kingdom)
A. Hernán-Caballero, Consejo Superior de Investigaciones Científicas (Spain)
R. Azzollini, Consejo Superior de Investigaciones Científicas (Spain)
A. Glasse, UK Astronomy Technology Ctr. (United Kingdom)
S. Kendrew, Leiden Observatory, Leiden Univ. (Netherlands)
B. Brandl, Leiden Observatory, Leiden Univ. (Netherlands)
F. Lahuis, SRON Netherlands Institute for Space Research (Netherlands)

Published in SPIE Proceedings Vol. 7731:
Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann Jr.; Mark C. Clampin; Howard A. MacEwen, Editor(s)

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