CI Tau’s spectral flux density distribution. The grey dots display CI Tau’s photometry from this paper’s data and those of Rodmann et al. (2006). Photometry by Chung et al. (2024) is over-plotted with black dots in the insert. Full markers show the total flux density (i.e. before point-source subtraction) for the ALMA Band 3 and the VLA Q and Ka band data. The maximum and minimum integrated flux densities across different scans are displayed as smaller dots for the Ku and X band data to highlight their short timescale variability.