A simple method of correcting magnitudes for the errors introduced by atmospheric refraction

Details A simple method of correcting magnitudes for the errors introduced by atmospheric refraction A simple method of correcting magnitudes for the errors introduced by atmospheric refraction

2003-11-26

arxiv.org/abs/astro-ph/0311588v1

Astronomy and Astrophysics

Astrophysics

8 pages, 3 figures, accepted for publication in Acta Astronomica

Scientific paper

We show that the errors due to atmospheric refraction are present in the magnitudes determined with the Difference Images Analysis method. In case of single, unblended stars the size of the effect agrees with the theoretical prediction. But when the blending is strong, what is quite common in a dense field, then the effect of atmospheric refraction can be strongly amplified to the extend that some cases of apparently variable stars with largest amplitudes of variations are solely due to refraction. We present a simple method of correcting for this kind of errors.

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