Swift X-ray light curve from 2014 to 2016. The solid line at JD 2456841 marks the time of the XMM observation discussed in Parker et al. (2016). The observed 0.3–10 keV X-ray flux is given in units of 10⁻¹¹ ergs s⁻¹ cm⁻². The X-ray count rates (CR), the X-ray photon index Γ of a simple power-law model, and the hardness ratios (HR) are also shown. The UVOT W2, M2, W1, U, B, and V magnitudes are given in the Vega system.