CanariCam: The Multi-Mode Mid-IR Instrument for the GTC

Details CanariCam: The Multi-Mode Mid-IR Instrument for the GTC CanariCam: The Multi-Mode Mid-IR Instrument for the GTC

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005rmxac..24....7p&link_type=abstract

II International GTC Workshop: Science with GTC 1st-light Instruments and the LMT (Eds. A. M. Hidalgo-Gámez, J. J. González, J.

Astronomy and Astrophysics

Astronomy

1

Instrumentation: Miscellaneous, Instrumentation: Spectrographs, Methods: Observational

Scientific paper

The University of Florida is in the final stages of completing a mid-infrared camera for the 10.4-meter Gran Telescopio CANARIAS. CanariCam has four science modes and two engineering modes, which use the same 320 × 240-pixel, arsenic-doped silicon, blocked-impurity-band detector from Raytheon. CanariCam represents an evolution of the successful instrument design of T-ReCS, the Gemini South facility mid-IR imager/spectrometer commissioned in summer 2003, which was also designed and built at the University of Florida. Each mode can be remotely selected quickly during an observing sequence. The pixel scale is 0.08 arcsec, resulting in Nyquist sampling of the diffraction-limited point-spread-function at 8 microns, the shortest wavelength for which CanariCam is optimized. The total available field of view for imaging is 26 arcsec × 19 arcsec. The primary science mode will be diffraction-limited imaging using one of several available spectral filters in the 10μ m (around 7.5-13.5μ m) and 20μ m (around 16-26μ m) atmospheric windows. Any one of four plane gratings can be inserted for low and moderate-resolution (R = 60 - 1300) slit spectroscopy in the 10 and 20-μ m regions. In the 10 μ m window, insertion of appropriate field and Lyot stops converts the camera into a coronagraph, while insertion of an internal rotating half-wave plate, a field mask, and a Wollaston prism converts the camera into a dual-beam polarimeter.

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