Wavelength calibration of the JWST-MIRI medium resolution spectrometer

J. R. Martínez-Galarza; A. M. Glauser; A. Hernán-Caballero; R. Azzollini; A. Glasse; S. Kendrew; B. Brandl; F. Lahuis

doi:10.1117/12.856840

10 August 2010 Wavelength calibration of the JWST-MIRI medium resolution spectrometer

J. R. Martínez-Galarza, A. M. Glauser, A. Hernán-Caballero, R. Azzollini, A. Glasse, S. Kendrew, B. Brandl, F. Lahuis

Proceedings Volume 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave; 77313Q (2010) https://doi.org/10.1117/12.856840
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

J. R. Martínez-Galarza, A. M. Glauser, A. Hernán-Caballero, R. Azzollini, A. Glasse, S. Kendrew, B. Brandl, and F. Lahuis "Wavelength calibration of the JWST-MIRI medium resolution spectrometer", Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77313Q (10 August 2010); https://doi.org/10.1117/12.856840

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KEYWORDS

Fabry–Perot interferometers

Calibration

Spectral resolution

Sensors

Spectroscopy

Data modeling

Instrument modeling

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