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About alexpi

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  1. Hello I have an issue to calculate flux ratio of a star at 1 μm and 0.55μm. The informations I have are: Apparent magnitude : 7 mag for 0.55μm the star is type A magnitude is given by : m=-2,5 log (f) -56 I think to substract the magnitude but I don't have information of the magnitude at 1 μm Thanks Alex
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