Abstract
Apparent magnitude m of a star is defined by the logarithms of energy I received above the Earth’s atmosphere as follows:
where c is the constant to be determined by comparison with a standard star.
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Further reading
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Kogure, T., Leung, KC. (2007). Stellar Spectra and Radiation Fields. In: The Astrophysics of Emission-Line Stars. Astrophysics and Space Science Library, vol 342. Springer, New York, NY. https://doi.org/10.1007/978-0-387-68995-1_2
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