FIRE is a dual-mode infrared (IR) spectrometer designed for operation at the Magellan telescopes at Las Campanas Observatory, Chile. Its primary mode employs a combination of a diffraction grating and four prisms to deliver cross-dispersed spectra covering the whole near-IR bandpass in a single exposure, with wavelength resolution of R = Dl / l = 6000.

FIRE also offers a low dispersion mode, where the diffraction grating is replaced by a mirror to yield R~1200 spectra dispersed solely by prisms.

The design incorporates a large-format, 2K x 2K pixel IR focal plane array. The optics and detector will be enclosed together in a 77K vacuum cryogenic dewar, which will be cooled by a closed cycle helium refrigerator.

FIRE's design has been kept compact, and it is geared toward minimal mechanical and thermal engineering complexity.

Magellan Telescopes at

The Magellan Telescopes at
Las Campanas Observatory, Chile

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