Spectral index and curvature maps (top) with corresponding uncertainty maps (bottom) of PSZ2G091. Left column: resolution of 4.5″ using the 144 MHz, 650 MHz, 1.5 GHz, and 3.0 GHz observations. Central and Right columns: Resolution of 12″ using the 144 MHz, 400 MHz, 650 MHz, 1.5 GHz, and 3.0 GHz observations. Radio contours are from the 3.0 GHz observations, drawn at the 2.5σ_rms × [1, 2, 4, 8, 16, 32] levels (with ) and ).