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venkatpunjabi
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I have read it in many papers that this is a flux limited sample. But I have trouble in understanding what is the exact meaning of it and why do we use flux limited samples?
A flux limited sample is a sample of objects or data that have been limited to a certain range of flux, or brightness. This means that only objects or data above a certain level of brightness are included in the sample, while fainter objects are excluded.
A flux limited sample is used to reduce bias and improve the statistical significance of results. By limiting the sample to a certain range of flux, researchers can ensure that they are studying a more representative sample of objects or data, rather than just the brightest or most easily observed ones.
A flux limited sample is created by setting a specific flux threshold and only including objects or data that meet or exceed this threshold. This could be done manually by selecting objects or data above the threshold, or through automated processes using computer algorithms.
Using a flux limited sample allows researchers to study a more homogenous group of objects or data, making it easier to draw conclusions and make comparisons. It also helps to control for variables such as distance and luminosity, which can affect the observed flux of an object.
One limitation of using a flux limited sample is that it may exclude important data or objects that fall below the flux threshold. This could lead to biased results if these objects are significant in the overall population. Additionally, the chosen flux threshold may also affect the results and conclusions drawn from the sample.