Eclipsing spotted giant star with K2 and historical photometry

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Table 3.

Observed rotational periods of EPIC 211759736.

Survey	JD start–end	Years	P_rot ^a	ampl.^b
ASAS	52623–53143	2002–2004	36.32	0.21
ASAS	53322–53884	2004–2006	36.39	0.19
ASAS	54092–54612	2006–2008	36.35	0.13
			18.11	0.04
ASAS	54774–54975	2008–2009	36.30	0.08
HAT	54792–54971	2008–2009	36.22	0.07
			18.11	0.02
HAT	55507–55674	2009–2010	36.40	0.09
			18.19	0.03

Average	52623–55674	2002–2010	36.33 ± 0.03	...

Notes. For comparison: P_orb = 36.522 days.

^(a)

The uncertainties in the spot-rotation periods are approximately 0.2 days, which means that periods of more than this amount result in noticeable changes in the folded light curve.

^(b)

Fourier amplitude.

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