Optical and IR data of SN 2021irp. All data are corrected both for MW and host galaxy extinction. The vertical ticks represent the timing of spectral observations. The downward triangles are 3σ upper limits. Where there are multiple observations on the same night, the individual observations are shown with transparent symbols, and the binned measurement is shown with a solid symbol with a black outline. The solid lines show the results of Gaussian processing of the measured fluxes in both time and wavelength simultaneously, with the shaded region showing the associated uncertainties.