IMACS: The Inamori-Magellan Areal Camera and Spectrograph on Magellan-Baade

Abstract

The Inamori-Magellan Areal Camera and Spectrograph (IMACS) is a wide-field, multipurpose imaging spectrograph on the Magellan-Baade telescope at Las Campanas Observatory. IMACS has two channels-f/2 and f/4, each with an 8K×8K pixel mosaic of CCD detectors, that service the widest range of capabilities of any major spectrograph. These include wide-field imaging at two scales, 0.20" pixel and 0.11" pixel, single-object and multislit spectroscopy, integral-field spectroscopy with two 5"×7" areas sampled at 0.20" pixel (Durham IFU), a multiobject echelle (MOE) capable of N˜10 simultaneous full-wavelength R≈20,000 spectra, the Maryland-Magellan Tunable Filter (MMTF), and an image-slicing reformatter for dense-pack multislit work (GISMO). Spectral resolutions of 8