10. Instruments VII: HAWC+

The High-resolution Airborne Wideband Camera is a multi-wavelength far-infrared camera and imaging polarimeter with continuum bandpasses from 40 μm to 300 μm. HAWC consists of two 64x40 bolometer arrays that simultaneously measure both orthogonal states of linear polarization. With one exception, each passband is diffraction limited with pixel spacing that Nyquist samples the beam, yielding spatial resolutions of 5 to 20 arcsecond and instantaneous fields of view of 2 to 8 arcminutes. (The 63 μm band is optimized for mapping speed at the expense of sampling density.) HAWC+ can measure either total intensity only, or also polarized intensity, as determined by the usage of rotating half-wave plates.

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