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Proceedings Paper

Spectroscopy using the Hadamard Transform
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Paper Abstract

The IRMOS (Infrared Multiobject Spectrometer) is a multi-object imaging dispersive spectrometer for astronomy, with a micromirror array to select desired objects. In standard operation, the mirrors are used to select multiple compact sources such that their resulting spectra do not overlap on the detector. The IRMOS can also be operated in a Hadamard mode, in which the spectra are allowed to overlap, but are modulated by opening the mirrors in many combinations to enable deconvolution of the individual spectra. This mode enables integral field spectroscopy with no penalty in sensitivity relative to the standard mode. There are minor penalties in overhead and systematics if there are sky or instrumental drifts. We explain the concept and discuss the benefits with an example observation of the Orion Trapezium using the 2.1 m telescope at Kitt Peak National Observatory.

Paper Details

Date Published: 27 January 2009
PDF: 8 pages
Proc. SPIE 7249, Sensors, Cameras, and Systems for Industrial/Scientific Applications X, 72490X (27 January 2009); doi: 10.1117/12.810499
Show Author Affiliations
D. J. Fixsen, Univ. of Maryland (United States)
M. A. Greenhouse, Goddard Space Flight Center (United States)
J. W. MacKenty, Space Telescope Institute (United States)
J. C. Mather, Goddard Space Flight Center (United States)


Published in SPIE Proceedings Vol. 7249:
Sensors, Cameras, and Systems for Industrial/Scientific Applications X
Erik Bodegom; Valérie Nguyen, Editor(s)

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