A Mini-BAL Outflow at 900 pc from the Central Source: VLT/X-shooter
  Observations
  We determine the physical conditions and location of the outflow material
seen in the mini-BAL quasar SDSS J1111+1437 (z = 2.138). These results are
based on the analysis of a high S/N, medium-resolution VLT/X- shooter spectrum.
The main outflow component spans the velocity range -1500 to -3000 km s$^{-1}$
and has detected absorption troughs from both high-ionization species: C IV , N
V , O VI , Si IV , P V , and S IV ; and low-ionization species: H I , C II , Mg
II , Al II , Al III , Si II , and Si III . Measurements of these troughs allow
us to derive an accurate photoionization solution for this absorption
component: a hydrogen column density, log ( N H ) = 21.47 $^{+0.21}_{-0.27}$
cm$^{-2}$ and ionization parameter, log (U_H) = -1.23$^{+0.20}_{-0.25}$.
Troughs produced from the ground and excited states of S IV combined with the
derived U_H value allow us to determine an electron number density of log (n_e)
= 3.62$^{+0.09}_{-0.11}$ cm$^{-3}$ and to obtain the distance of the ionized
gas from the central source: R = 880$^{+220}_{-260}$ pc.
