Residuals for the timings of WASP-11/HAT-P-10 b at mid-transit versus a linear ephemeris. The filled black dots are from this work, open circles from the literature, (i.e. Bakos et al. 2009; Sada et al. 2012; Wang et al. 2014), and grey dots from ETD. The dashed lines mark 2σ uncertainties of the ephemeris, which was estimated without considering the data from ETD.