Narrow Line QSO

NLQ1 NLQ1 – (Narrow-Line Quasar 1) – QSO with relatively narrow broad lines. Analogous to NLS1 defined by Osterbrock & Pogge (1985) as soft X-ray sources, having relatively narrow (∼2000 km/s) permitted lines only slightly broader than the forbidden ones. Various FeI, FeII, and FeIII emission lines are present, as well as often strong [FeVII] and [FeX] lines with higher ionization. The permitted lines may show or not show narrow component, depending on the subtypes. In case of low S/N and low quality, many objects are being classified as NLQ1 without a subclass.	NLQ1.0 NLQ1.0 – (Narrow-Line Quasar 1.0) – QSO with relatively narrow broad lines. Analogous to NLS1 defined by Osterbrock & Pogge (1985) as soft X-ray sources, having relatively narrow (∼2000 km/s) permitted lines only slightly broader than the forbidden ones. Various FeI, FeII, and FeIII emission lines are abundantly present, as well as often strong [FeVII] and [FeX] lines with higher ionization. The permitted lines do not show narrow component.
NLQ1.2 NLQ1.2 – (Narrow-Line Quasar 1.2) – QSO with relatively narrow broad lines. Analogous to NLS1 defined by Osterbrock & Pogge (1985) as soft X-ray sources, having relatively narrow (∼2000 km/s) permitted lines only slightly broader than the forbidden ones. Various FeI, FeII, and FeIII emission lines are present, as well as often strong [FeVII] and [FeX] lines with higher ionization. The permitted lines show weak narrow component.	NLQ1.5 NLQ1.5 – (Narrow-Line Quasar 1.5) – QSO with relatively narrow broad lines. Analogous to NLS1 defined by Osterbrock & Pogge (1985) as soft X-ray sources, having relatively narrow (∼2000 km/s) permitted lines only slightly broader than the forbidden ones. Various FeI, FeII, and FeIII emission lines are present, as well as often strong [FeVII] and [FeX] lines with higher ionization. The permitted lines show medium strength narrow component. The intensity ratio of broad and narrow components is approximately equal.
NLQ1.8 NLQ1.8 – (Narrow-Line Quasar 1.8) – QSO with relatively narrow broad lines. Analogous to NLS1 defined by Osterbrock & Pogge (1985) as soft X-ray sources, having relatively narrow (∼2000 km/s) permitted lines only slightly broader than the forbidden ones. Various FeI, FeII, and FeIII emission lines are present, as well as often strong [FeVII] and [FeX] lines with higher ionization. The permitted lines show strong narrow components and weak broad components only for Hα and Hβ.