One of the tools for studying eclipsing binary stars is the O-C diagram, in which the temporal development of the differences between observed (O) and calculated (C) times of brightness minima of these variable stars is shown.

In collaboration with Polish colleagues, one of the largest worldwide collections of this data has been acquired. The goal of this thesis is to make this database accessible through a web interface.

The typical user should be able to dynamically display data for a selected star and a chosen part of the dependency, fitting it with a simple polynomial. The user should also be able to download the data of the chosen star as a text file. The administrator should then have the ability to add data to the database either individually or in bulk via data import from a text file.

The created code will be publicly available in the IS under the MIT license.