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Table 2

Frequency analysis for J1219–39.

Year N P (day) Amp (mmag) FAP

2006 1855 10.710 6 0.027
2007 12 104 5.292 5 0.004
2008 6019 10.300 3 0.001

Notes. N is the number of observations, P is the period corresponding to the strongest peak in the periodogram, Amp is the amplitude of the best-fit sine wave in milli-magnitudes and FAP is the false-alarm probability.

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