Kerr et al. (2014) studied the emission
from PSR J1717-4054 over intervals from single pulses to years using the
Parkes radio telescope and the Australia Telescope Compact Array (ATCA).
They identified and characterized nulling at three discrete time-scales:
the pulsar emits during `active states' separated by nulls lasting many
thousands of rotations, while active states themselves are interrupted by
nulls with a bimodal distribution of durations - one to two rotations, or
tens of rotations. - The image shows a typical "waterfall" plot with the
pulsar in its ON & OFF states over the two days of observations. Both the
long nulls and short nulls are clearly visible, as well as the extreme
randomness in distribution of OFF times.
ATNF
Science Highlights from refereed publications during 2014.
|