  We present a new accurate sample of narrow-line Seyfert 1 galaxies (NLS1s) in
the southern hemisphere from the Six-degree Field Galaxy Survey (6dFGS). Based
on the optical spectral features, 167 sources were classified as NLS1s. We
derived flux-calibrated spectra in the sample for the first time. Strong
luminosity correlations between the continuum and the emission lines were
found. We estimated their central black hole masses and Eddington ratios, which
are lying in a typical range of NLS1s. In the sample, 23 NLS1s were detected at
radio frequencies and 12 of them are radio-loud. We publish the X-ray data
analysis of a campaign of observations carried out by the Swift X-ray
Telescope.
