NGC 1275 as observed with NOT/ALFOSC on March 21, 2025. Top left: Total flux spectrum (corrected for instrumental response, in arbitrary units). Top right: Polarized flux (total flux multiplied by the polarization degree). Bottom left: Linear polarization degree (P_d). Bottom right: Polarization position angle (θ). All but the total flux spectrum were re-binned to 137 consecutive pixels (∼237 Å), with observational errors indicated per spectral bin.