Long-term, multiwavelength light curves of T CrB since March, 2012 until August 2025. From top to bottom: (i) Swift/XRT light curve in the 0.3–10 keV energy range; (ii) Swift/BAT 14–50 keV light curve with 100-day bins. (iii) AAVSO B-band light curve (Johnson magnitudes). Downward arrows mark the dates of the XMM-Newton (blue), HST (orange), and NuSTAR (red) observations. Note: Because some XMM-Newton and HST observations were quasi-simultaneous, their marks overlap in this panel and we only mark the dates of those HST observations flagged as Good in Table 1. The purple-shadowed region comprises the period known as the SAS, while the pink-shaded region marks the period when the optical/UV brightness dropped to pre-SAS levels, known as the dip, and the green-shadowed region shows the period that started around late 2023 when the brightness in optical/UV has started to rise again in the recovery phase; (iv) Swift/UVOT light curve in the uvm2, uvw2, uvw1, u filters; (v) AAVSO B − V color, where red indicates a redder, cooler emission, while blue shows the opposite.