The Mitchell Spectrograph: Studying Nearby Galaxies with the VIRUS Prototype
Figure 1
The Mitchell Spectrograph. (a) Diagram showing the interior of the instrument. The casing of the fiber output pseudoslit can be seen in black at the top right, from there light is reflected onto the collimator mirror (purple), back onto a flat mirror at the position of the pseudo-slit, and down through the VPH grating (yellow) and into the Schmidt camera at the bottom of the spectrograph (gold). Dispersed light is reimaged onto a Fairchild Instruments backside illuminated, antireflection coated CCD. The liquid dewar is also shown in the foreground. (b) The Mitchell Spectrograph installed on the broken Cassegrain focus of the 2.7 m telescope. The gimbal mount can be seen in blue. (c) A zoom into the input head of the 246 fiber IFU.
