Covering fraction

• assuming random views
• % of obscured AGN =
• % of obscured sky =
• covering fraction
• need sample of AGN
• + selection function
• +L, z, NH range coverage

Compton-thick sky

Torus, Nuclear (?) Goulding&Alexander+09

Unobscured sky

Obscured sky: Nuclear? Galaxy?

Matt2000

Marin+16