Parametrization of the CIV emission line profile of the Weak [OIII] quasar J1422+4417 (upper panel) and the [OIII] quasar J0745+4734 (lower panel). In both panels the red, yellow, and blue curves refer to the best fit of the spectrum, virialized component, and outflow component of the CIV emission line, respectively. The black dashed line indicates the λ_CIV at 1549 Å. The red dotted-dashed line denotes the peak of the CIV emission line and represents its velocity shift with respect to the systemic λ1549 Å. The blue dotted-dashed line indicates the peak of the outflow component and is its velocity shift with respect to the systemic redshift. In the lower panel the green curve refers to an additional Gaussian component required by the fit, in order to better describe the CIV profile in this QSO.