  Using the medium resolution spectrograph X-shooter, spectra of 235 OB and
Wolf-Rayet (WR) stars in sub-solar metallicity environments have been secured.
[...]This second paper focuses on the optical observations of 232 Magellanic
Clouds targets. It describes the uniform reduction of the UVB (300 - 560 nm)
and VIS (550 - 1020 nm) XShootU data as well as the preparation of advanced
data products [...] . The data reduction of the raw data is based on the ESO
CPL X-shooter pipeline. We paid particular attention to the determination of
the response curves [...] We implemented slit-loss correction, absolute flux
calibration, (semi-)automatic rectification to the continuum, and a correction
for telluric lines. The spectra of individual epochs were corrected for the
barycentric motion, re-sampled and co-added, and the spectra from the two arms
were merged into a single flux calibrated spectrum covering the entire optical
range with maximum signal-to-noise ratio. [...] We provide three types of data
products: (i) two-dimensional spectra for each UVB and VIS exposure; (ii)
one-dimensional UVB and VIS spectra before and after response-correction, as
well as after applying various processing, including absolute flux calibration,
telluric removal, normalisation and barycentric correction; and (iii) co-added
flux-calibrated and rectified spectra over the full optical range, for which
all available XShootU exposures were combined. For many of the targets, the
final signal-to-noise ratio per resolution element is above 200 in both the UVB
and the VIS co-added spectra. The reduced data and advanced scientific data
products will be made available to the community upon publication of this
paper. [...]
