The Multi-Unit Spectroscopic Explorer (MUSE) is an integral field spectrograph installed at the Very Large Telescope (VLT) of the European Southern Observatory (ESO).[1][2][3] It operates in the visible wavelength range,[1] and combines a wide field of view with a high spatial resolution and a large simultaneous spectral range (480-930 nm).[4] It is specifically designed to take advantage of the improved spatial resolution provided by adaptive optics, offering diffraction-limited performance in specific configurations.[1] MUSE had first light on the VLT’s Unit Telescope 4 (UT4) on 31 January 2014.[5]
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