Algol’s O-C data (IMAGE)
Caption
Figure: (a) Algol’s O-C data (red circles). The time-axis units are days between November 1782 and October 2018. The green continuous line shows the five signal model for the first 226 years of data before the dotted vertical line. The data minus model differences are offset from zero to -0.3 (blue circles). (b) The last 15 years of O-C data. Beyond the vertical dotted line begins the prediction for the last 10 years (continuous green line). The dotted green lines show the prediction error limits. This test checks how well does the model for the first 226 years data predict the last 10 years of data. The prediction is excellent.
Credit
Lauri Jetsu
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Credit: Lauri Jetsu
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