Variation in mid-IR emission from the outflow lobes. (a) Integrated flux density over the SE (red points) and NW (blue points) lobes as a function of time (from Table 1). The sinusoids represent the best fits to the solid points of corresponding colour. The empty points correspond to the Spitzer data, which have not been accounted for in the sinusoidal fits. The dotted sinusoid represents the fit (with arbitrary intensity) to the CH₃OH maser intensity obtained from Fig. 1 of Szymczak et al. (2024). (b) NW-to-SE lobe flux ratio as a function of time. The green curve represents the ratio of the blue-to-red sinusoids in the top panel.