The three discrete nulling time-scales of PSR J1717-4054
PSR J1717−4054 is one of the small class of pulsars which null on intermediate (∼h) time-scales. Such pulsars represent an important link between classical nullers – whose emission vanishes for a few rotations – and the intermittent pulsars which null for months and years. Using the Parkes radio tel...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/24380 |
| _version_ | 1848751411790086144 |
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| author | Kerr, M. Hobbs, G. Shannon, Ryan Kiczynski, M. Hollow, R. Johnston, S. |
| author_facet | Kerr, M. Hobbs, G. Shannon, Ryan Kiczynski, M. Hollow, R. Johnston, S. |
| author_sort | Kerr, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | PSR J1717−4054 is one of the small class of pulsars which null on intermediate (∼h) time-scales. Such pulsars represent an important link between classical nullers – whose emission vanishes for a few rotations – and the intermittent pulsars which null for months and years. Using the Parkes radio telescope and the Australia Telescope Compact Array, we have studied the emission from PSR J1717−4054 over intervals from single pulses to years. We have 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. We detect no sub-pulse structure or flux-density variations during active states, and we place stringent limits (<0.1 per cent of the mean active flux density) on pulsed emission during inactive states. Finally, our high-quality data have also allowed us to measure for the first time many important properties of PSR J1717−4054, including its position, spin-down rate, spectrum, polarization characteristics, and pulse broadening in the interstellar medium. |
| first_indexed | 2025-11-14T07:52:18Z |
| format | Journal Article |
| id | curtin-20.500.11937-24380 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:52:18Z |
| publishDate | 2014 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-243802018-03-29T09:08:00Z The three discrete nulling time-scales of PSR J1717-4054 Kerr, M. Hobbs, G. Shannon, Ryan Kiczynski, M. Hollow, R. Johnston, S. PSR J1717−4054 is one of the small class of pulsars which null on intermediate (∼h) time-scales. Such pulsars represent an important link between classical nullers – whose emission vanishes for a few rotations – and the intermittent pulsars which null for months and years. Using the Parkes radio telescope and the Australia Telescope Compact Array, we have studied the emission from PSR J1717−4054 over intervals from single pulses to years. We have 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. We detect no sub-pulse structure or flux-density variations during active states, and we place stringent limits (<0.1 per cent of the mean active flux density) on pulsed emission during inactive states. Finally, our high-quality data have also allowed us to measure for the first time many important properties of PSR J1717−4054, including its position, spin-down rate, spectrum, polarization characteristics, and pulse broadening in the interstellar medium. 2014 Journal Article http://hdl.handle.net/20.500.11937/24380 10.1093/mnras/stu1716 restricted |
| spellingShingle | Kerr, M. Hobbs, G. Shannon, Ryan Kiczynski, M. Hollow, R. Johnston, S. The three discrete nulling time-scales of PSR J1717-4054 |
| title | The three discrete nulling time-scales of PSR J1717-4054 |
| title_full | The three discrete nulling time-scales of PSR J1717-4054 |
| title_fullStr | The three discrete nulling time-scales of PSR J1717-4054 |
| title_full_unstemmed | The three discrete nulling time-scales of PSR J1717-4054 |
| title_short | The three discrete nulling time-scales of PSR J1717-4054 |
| title_sort | three discrete nulling time-scales of psr j1717-4054 |
| url | http://hdl.handle.net/20.500.11937/24380 |