= D. H. Kelker
{c}
<D. H. Kelker> coauthored the classical <Lutz-Kelker bias> analysis with <T. E. Lutz>. Its mathematical question is how a noisy observed <stellar parallax>, together with assumptions about the underlying stellar population, changes the inference of <absolute magnitude>.
The paper makes those assumptions explicit, including a <Gaussian distribution> for measurement errors. Its correction belongs to that statistical model; applying it to a different selection process requires checking the model again.<On the Use of Trigonometric Parallaxes for the Calibration of Luminosity Systems: Theory by T. E. Lutz and D. H. Kelker>[pp. 573–574, abstract and beginning of The Distribution Function]{ref}
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