  Quadruply lensed quasars are extremely rare objects, but incredibly powerful
cosmological tools. Only few dozen are known in the whole sky. Here we present
the spectroscopic confirmation of two new quadruplets WG0214-2105 and
WG2100-4452 discovered by Agnello & Spiniello (2018) within the Dark Energy
Survey (DES) public footprints. We have conducted spectroscopic follow-up of
these systems with the Southern African Large Telescope as part of a program
that aims at confirming the largest possible number of optically selected
strong gravitational lensing systems in the Equatorial and Southern Hemisphere.
For both systems, we present the spectra for the sources and deflectors that
allowed us to estimate the source redshifts and unambiguously confirm their
lensing nature. For the brighter deflector (WG2100-4452), we measure the
stellar velocity dispersion from the spectrum. We also obtain photometry for
both lenses, directly from DES multi-band images, isolating the lens galaxies
from the quasar images. One of the quadruplets, WG0214-2105, was also observed
by Pan-STARRS, allowing us to estimate the apparent brightness of each quasar
image at two different epochs, and thus to find evidence for flux variability.
This result could suggest a microlensing event for the faintest components,
although intrinsic variability cannot be excluded with only two epochs.
Finally, we present simple lens models for both quadruplets, obtaining Einstein
radii, SIE velocity dispersions, ellipticities, and position angles of the lens
systems, as well as time delay predictions assuming a concordance cosmological
model.
