Abstract
DURING September 1972, we made a number of 5-µm observations of the eclipsing binary β Per (Algol) using the 60-inch infrared flux collector at Izana, Tenerife. Our photometer was of conventional design, having a nodding mirror to give sky background cancellation and using an indium antimonide detector cooled to 77 K. α Per was used as a comparison source and this in turn was calibrated against better known infrared standards such as α Lyr. Poor weather conditions did not allow us to make as many observations as we would have liked, but sufficient to define the principal light curve.
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References
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JAMESON, R., LONGMORE, A. & CRAWFORD, B. 5-µm Infrared Emission from Algol. Nature 242, 107–108 (1973). https://doi.org/10.1038/242107a0
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DOI: https://doi.org/10.1038/242107a0
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