Physics – Optics
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.2409p&link_type=abstract
American Astronomical Society Meeting 210, #24.09; Bulletin of the American Astronomical Society, Vol. 39, p.130
Physics
Optics
Scientific paper
The McMath-Pierce Solar Telescope (McMP) utilizes an all-reflecting optical system of 1.6-meter aperture, still the largest among solar telescopes. This unique optical configuration allows for high spatial, spectral and temporal infrared mapping of the solar surface. The National Solar Observatory (NSO) has invested in a robust IR instrumentation development program at the McMP. Now available as a facility instrument is a 10242 InSb array camera for use in the 1 - 5 µm thermal infrared. Known as the NSO Array Camera (NAC), it was designed to couple to the telescope's very high dispersion spectrograph. The spectral imaging capability of the NAC is enhanced with a low-order IR adaptive optics (IRAO) system designed to correct seeing to the diffraction limit of the telescope under moderate seeing conditions redward of 2.3 µm. The IRAO can scan the corrected image across the spectrograph input slit allowing 2-D mapping of the solar surface. Liquid crystal retardation modulators and polarizing optics have been added to the spectrograph to enable the NAC to record IR Stokes polarimetry data. Presented here are movies of solar granulation at 2.2 µm obtained with the NAC/IRAO, Stokes polarimetric spectra of the 1.56 µm g=3 Fe I absorption line, and sample observations of the CO 4.6 µm absorption lines.
Penn Matt J.
Plymate Claude
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