Electron density calculation for jet 1 and jet 2. Here, we show plots of O IV 1399.77 Å (first column) and O IV 1401.16 Å (second column), comparative plots of O IV 1399.77 Å and O IV 1401.16 Å multiplied by the ratio (third column), and the theoretical ratio–electron density plot by CHIANTI 10.0.1. (forth column), where the solid horizontal line is the calculated ratio and the dashed ones are the upper and lower values. Intensity is measured in erg s⁻¹ sr⁻¹ cm⁻² Å⁻¹ and density in cm⁻³.