  We aim to define a sample of intermediate-z disk galaxies harbouring central
bulges, and a complementary sample of disk galaxies without measurable bulges.
We intend to provide colour profiles for both samples, as well as measurements
of nuclear, disk, and global colours, which may be used to constrain the
relative ages of bulges and disks. We select a diameter-limited sample of
galaxies in images from the HST/WFPC2 Groth Strip survey, which is divided into
two subsamples of higher and lower inclination to assess the role of dust in
the measures quantities. Mergers are visually identified and excluded. We take
special care to control the pollution by ellipticals. The bulge sample is
defined with a criterion based on nuclear surface brightness excess over the
inward extrapolation of the exponential law fitted to the outer regions of the
galaxies. We extract colour profiles on the semi-minor axis least affected by
dust in the disk, and measure nuclear colours at 0.85 kpc from the centre over
those profiles. Disk colours are measured on major axis profiles; global
colours are obtained from 2.6"-diameter apertures. We obtain a parent sample
containing 248 galaxies with known redshifts, spectroscopic or photometric,
spanning 0.1 < z < 1.2. The bulge subsample comprises 54 galaxies (21.8% of the
total), while the subsample with no measureable bulges is 55.2% of the total
(137 galaxies). The remainder (23%) is composed of mergers. We list nuclear,
disk, and global colours (observed and restframe) and magnitudes (apparent and
absolute), as well as galaxy colour gradients for the samples with and without
bulges. We also provide images, colour maps, plots of spectral energy
distributions, major-axis surface brightness profiles, and minor-axis colour
profiles for both samples.
