The Mid-Infrared Instrument for the James Webb Space Telescope, VI: The Medium Resolution Spectrometer
Journal article, 2015
We describe the design and performance of the Medium Resolution Spectrometer (MRS) for the JWST-MIRI instrument. The MRS incorporates four coaxial spectral channels in a compact opto-mechanical layout that generates spectral images over fields of view up to 7.7 x 7.7 '' in extent and at spectral resolving powers ranging from 1300 to 3700. Each channel includes an all-reflective integral field unit (IFU): an "image slicer" that reformats the input field for presentation to a grating spectrometer. Two 1024 x 1024 focal plane detector arrays record the output spectral images with an instantaneous spectral coverage of approximately one third of the full wavelength range of each channel. The full 5-28.5 mu m spectrum is then obtained by making three exposures using gratings and pass-band-determining filters that are selected using just two three-position mechanisms. The expected on-orbit optical performance is presented, based on testing of the MIRI Flight Model and including spectral and spatial coverage and resolution. The point spread function of the reconstructed images is shown to be diffraction limited and the optical transmission is shown to be consistent with the design expectations.
Thermal-Expansion Measurements
Optical Materials
Temperature
Rmany
Author
M. Wells
Royal Observatory
J. W. Pel
University of Groningen
A. Glasse
Royal Observatory
G. S. Wright
Royal Observatory
G. Aitink-Kroes
R. Azzollini
Centro de Astrobiologia (CAB)
Dublin Institute for Advanced Studies
S. Beard
Royal Observatory
B. R. Brandl
Leiden University
A. Gallie
Royal Observatory
V. C. Geers
Dublin Institute for Advanced Studies
A. M. Glauser
Swiss Federal Institute of Technology in Zürich (ETH)
P. Hastings
Royal Observatory
T. Henning
Max Planck Society
R. Jager
NOVA
Kay Justtanont
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
B. Kruizinga
Netherlands Organisation for Applied Scientific Research (TNO)
F. Lahuis
Netherlands Institute for Space Research (SRON)
Leiden University
D. Lee
Royal Observatory
I. Martinez-Delgado
Centro de Astrobiologia (CAB)
J. R. Martinez-Galarza
Harvard-Smithsonian Center for Astrophysics
Leiden University
M. Meijers
NOVA
J. E. Morrison
University of Arizona
F. Muller
Max Planck Society
T. Nakos
Ghent university
B. O'Sullivan
PO3 5PU
A. Oudenhuysen
P. Parr-Burman
Royal Observatory
E. Pauwels
NOVA
R. R. Rohloff
Max Planck Society
E. Schmalzl
Leiden University
J. Sykes
University Of Leicester
M. P. Thelen
California Institute of Technology (Caltech)
E. F. van Dishoeck
Leiden University
B. Vandenbussche
KU Leuven
L. B. Venema
H. Visser
Netherlands Organisation for Applied Scientific Research (TNO)
Lbfm Waters
Netherlands Institute for Space Research (SRON)
University of Amsterdam
D. Wright
SGT Inc.
Publications of the Astronomical Society of the Pacific
0004-6280 (ISSN) 1538-3873 (eISSN)
Vol. 127 953 646-664Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
Infrastructure
Onsala Space Observatory
DOI
10.1086/682281