  We present high signal-to-noise, full polarization pulse profiles for 40
bright, 'slowly'-rotating (non-recycled) pulsars using the new Ultra-Wideband
Low-frequency (UWL; 704-4032 MHz) receiver on the Parkes radio telescope. We
obtain updated and accurate interstellar medium parameters towards these
pulsars (dispersion measures and Faraday rotation measures), and reveal Faraday
dispersion towards PSR J1721-3532 caused by interstellar scattering. We find
general trends in the pulse profiles including decreasing fractional linear
polarization and increasing degree of circular polarization with increasing
frequency, consistent with previous studies, while also revealing new features
and frequency evolution. This demonstrates results that can be obtained using
UWL monitoring observations of slow pulsars, which are valuable for improving
our understanding of pulsar emission and the intervening interstellar medium.
The calibrated data products are publicly available.
