Visual Minima Timings of Eclipsing Binaries: To Use or not to Use?
|Druh||Článek v odborném periodiku|
|Časopis / Zdroj||Central European Astrophysical Bulletin|
|Fakulta / Pracoviště MU|
|Obor||Astronomie a nebeská mechanika, astrofyzika|
|Klíčová slova||eclipsing binaries; minima timings|
|Popis||Plenty of mid-eclipse timings of short-periodic eclipsing binaries derived from series of visual observations appear to be an acceptable source of information for orbital period analyses, namely if they were done in time-intervals not covered by other types of observations. However, our thorough period analysis of the nearly contact eclipsing binary BS Vulpeculae proves that visually determined timings done in 1979-2003 were undoubtedly biased to accommodate the existing linear ephemeris. The heavily subjective character of visual observations disqualifies them as a source of true phase information apt for fine eclipsing binary period analyses. Consequently we warn against the use of visual timings without a preceding careful verification.|