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12 December 2016 Science with FORCAST, the mid-IR imager and grism spectrometer for SOFIA (Conference Presentation)
L. Andrew Helton
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Proceedings Volume 9973, Infrared Remote Sensing and Instrumentation XXIV; 99730P (2016) https://doi.org/10.1117/12.2238594
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States
Abstract
The Faint Object infraRed CAmera for the SOFIA Telescope (FORCAST) is a dual-channel mid-infrared camera and spectrograph sensitive from 5-40 µm. The Short Wave Camera (SWC) uses a Si:As blocked-impurity band (BIB) array optimized for λ < 25 µm, while the Long Wave Camera's (LWC) Si:Sb BIB array is optimized for λ < 25 µm. Observations can be made through either of the two channels individually or, by use of a dichroic mirror, with both channels simultaneously across most of the range. Spectroscopy is also possible using a suite of four grisms, which provide coverage from 5-40 µm with a low spectral resolution of R = λ =Δλ ~ 200. Since it’s commissioning FORCAST has made a number of exciting observations, including the discovery of dust that survived the reverse shock in the supernova remnant Sgr A East, the identification of an asteroid belt analog surrounding ε Eridani, and some of the highest resolution mid-IR observations of the transient Galactic circumnuclear ring to date. Here I present a selection of recent SOFIA FORCAST observations and discuss their relevance to a variety of today’s most pressing astronomical topics.
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L. Andrew Helton "Science with FORCAST, the mid-IR imager and grism spectrometer for SOFIA (Conference Presentation)", Proc. SPIE 9973, Infrared Remote Sensing and Instrumentation XXIV, 99730P (12 December 2016); https://doi.org/10.1117/12.2238594
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KEYWORDS
Mid-IR
Cameras
Spectroscopy
Imaging systems
Asteroids
Infrared cameras
Mirrors
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