1996A&A...313L..25P

We report on the detection of a Z_gal=0.101 galaxy projected on the sky at 4.2arcsec (or 5.2h^–1₁₀₀kpc for q₀=0.5) from the quasar Q 0439-433 (z_em=0.594). The HST spectrum of the quasar shows strong Mg II, Fe II, Si II, Al II and C IV absorption lines at the same redshift as the galaxy. The equivalent width ratios of the low ionization lines indicate that this system is probably damped with a neutral hydrogen column density of N(HI)∼10²⁰cm-2. The C IV doublet presents a complex structure and in particular a satellite with a velocity v=1100km/s relative to the galaxy. Additional HST and redshifted 21cm observations of this QSO-galaxy pair would offer an ideal opportunity to study the morphology of a damped absorber and the kinematics of the halo of a low-redshift galaxy.