Astronomical applications of infra-red television imaging

Details Astronomical applications of infra-red television imaging Astronomical applications of infra-red television imaging

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....77..257l&link_type=abstract

Astronomy and Astrophysics, vol. 77, no. 1-2, Aug. 1979, p. 257-260.

Astronomy and Astrophysics

Astrophysics

Astronomical Photometry, Infrared Imagery, Solar Spectra, Stellar Spectra, Television Cameras, Astronomical Photography, Photosphere, Solar Observatories, Sunspots, Video Equipment, Zeeman Effect

Scientific paper

Infrared imaging between 1 and 2.4 microns was realized with a television camera operated at the conventional video rate. A M2 star of visual magnitude 5.6 was detected at 1.2 and 1.6 microns. Alpha Ori was further observed at 2 microns and the corresponding smearing function was found to improve with increasing wavelength. The image structure (speckle) of Alpha Ori was visualized in the infrared and is briefly characterized as compared to the visible. Solar observations at 1.6 microns included direct imagery of sunspots and simultaneous spectrography of the photosphere and sunspot umbra. The Zeeman splitting of the 1.5648 microns Fe I line was observed and measurements are shown to be possible on processed CRT pictures.

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