The faintest magnitude of a star that can be detected by an astronomical telescope. The limit of detection is when the ratio of the detector output (signal) to its fluctuations (noise) is greater than approximately 3; below this magnitude, it becomes impossible to distinguish between stars and noise. Source : Heibonsha Encyclopedia About MyPedia Information |
天体望遠鏡で検出可能なもっとも光の弱い星の等級。検出の限界は検出器の出力(信号)とそのゆらぎ(雑音)との比がほぼ3より大きいときで,これ以下では星と雑音との区別がつかなくなる。
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