VISIR - The VLT Imager and Spectrometer for the mid-InfraRed is an instrument
providing diffraction limited, high sensitivity imaging in the two
mid-infrared atmospheric windows: the N band between 8 and 13 microns and the
Q band between 16.5 and 24.5 microns. It is also capable of taking long-slit
and echelle spectroscopic observations with spectral resolution of about 300,
3000, and 15000, respectively.
VISIR was undergoing an upgrade starting in May 2012: the detectors have been
replaced and have now 1024x1024 pixels (instead of 256x256). Furthermore, the
low-resolution spectroscopy mode has been modified so that the complete N band
can now be observed with a single exposure.