  We report on dual-frequency radio polarimetry observations of two young,
energetic pulsars, PSRs J0940-5428 and J1301-6305. These were among the first
Vela-like pulsars discovered in the Parkes Multibeam survey. We conducted
observations of these pulsars with the Australia Telescope Compact Array (ATCA)
at center frequencies of 1384 and 2496 MHz using pulsar gating while preserving
full Stokes parameters. After correcting for bandwidth depolarization, we have
measured polarization characteristics, flux densities, and rotation measures
for these pulsars. The spectral indices derived from the ATCA data are shallow
but still consistent with values seen for pulsars of this type. The rotation
measures for both pulsars are consistent with those reported recently using
data from the Parkes telescope, and both pulsars have highly linearly polarized
pulse profiles at both 1384 and 2496 MHz. Our results support a previously
noted correlation between high degree of linear polarization, shallow spectral
index, and large spin-down luminosity.

Astrophysics