Multiwavelength light curves of AT2019aalc. Bottom plot: X-ray and extinction-corrected and host-subtracted optical/UV. Middle plot: Multifrequency short-baseline radio. Upper plot: Extinction-corrected and host-subtracted IR. Here we show only the positive ZTF fluxes based on the forced photometry results. The dashed gray vertical line indicates the IceCube detection of the high-energy neutrino event IC191119A. The short, purple vertical lines on the top of the bottom panel indicate the peak times of the X-ray flares while the blue ones show the times the main optical r-band flare and later the bumps. The gray ‘S’ letters represent the observing times of the optical spectra.