First test results from FORCAST: The facility mid-IR camera for SOFIA
We report laboratory tests and development progress for the Faint Object Infrared Camera for the SOFIA Telescope (FORCAST). FORCAST is a two-channel camera with selectable filters for continuum and line imaging in the 5-40 micron wavelength region. Simultaneous imaging will be possible in the two channels: 5-25 microns using a Si:As 256×256 blocked impurity band (BIB) detector array, and 25-40 microns using a Si:Sb BIB. FORCAST will sample 0.75 arcseconds per pixel allowing a 3.2′×3.2′ instantaneous field-of-view in both channels simultaneously. Imaging will be diffraction limited for lambda > 15 microns on the SOFIA telescope. Since FORCAST operates in the wavelength range where the seeing is best from SOFIA, it will provide the highest spatial resolution possible from the airborne observatory. In addition to imaging, the FORCAST optical design provides for a simple upgrade to include spectroscopic observations using grisms mounted in the filter wheels. FORCAST will be available for facility testing and astronomical observations at SOFIA first (f)light.
Proceedings of SPIE - The International Society for Optical Engineering
Keller, Luke D.; Herter, Terry; Stacey, Gordon; Gull, George; Schoenwald, Justin; Pirger, Bruce; Adams, Joe; Berthoud, Marc G.; and Nikola, Thomas, "First test results from FORCAST: The facility mid-IR camera for SOFIA" (2004). Faculty Articles Indexed in Scopus. 1987.