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Table 1.

Results of χ2 test for short-time scale variability for the light curves represented in Fig. 2.

Binning V/d.o.f. p-value Significance
6 h 3.50 4 × 10−14 11.7σ
3 h 2.66 3 × 10−15 11.1σ
Orbital 1.50 3 × 10−5 4.6σ

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