Time-domain and spectral properties of pulsars at 154 MHz
We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range −80° < δ < 10°, we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on time-...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
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Oxford University Press
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/16193 |
| _version_ | 1848749105500651520 |
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| author | Bell, M. Murphy, T. Johnston, S. Kaplan, D. Croft, S. Hancock, P. Callingham, J. Zic, A. Dobie, D. Swiggum, J. Rowlinson, A. Hurley-Walker, N. Offringa, A. Bernardi, G. Bowman, J. Briggs, F. Cappallo, R. Deshpande, A. Gaensler, B. Greenhill, L. Hazelton, B. Johnston-Hollitt, M. Lonsdale, C. McWhirter, S. Mitchell, D. Morales, M. Morgan, E. Oberoi, D. Ord, S. Prabu, T. Udaya Shankar, N. Srivani, K. Subrahmanyan, R. Tingay, Steven Wayth, Randall Webster, R. Williams, A. Williams, C. |
| author_facet | Bell, M. Murphy, T. Johnston, S. Kaplan, D. Croft, S. Hancock, P. Callingham, J. Zic, A. Dobie, D. Swiggum, J. Rowlinson, A. Hurley-Walker, N. Offringa, A. Bernardi, G. Bowman, J. Briggs, F. Cappallo, R. Deshpande, A. Gaensler, B. Greenhill, L. Hazelton, B. Johnston-Hollitt, M. Lonsdale, C. McWhirter, S. Mitchell, D. Morales, M. Morgan, E. Oberoi, D. Ord, S. Prabu, T. Udaya Shankar, N. Srivani, K. Subrahmanyan, R. Tingay, Steven Wayth, Randall Webster, R. Williams, A. Williams, C. |
| author_sort | Bell, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range −80° < δ < 10°, we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on time-scales of minutes to years. For three of these pulsars, PSR J0953+0755, PSR J0437−4715, and PSR J0630−2834, we observe interstellar scintillation and variability on time-scales of greater than 2 min. One further pulsar, PSR J0034−0721, showed significant variability, the physical origins of which are difficult to determine. The dynamic spectra for PSR J0953+0755 and PSR J0437−4715 show discrete time and frequency structure consistent with diffractive interstellar scintillation and we present the scintillation bandwidth and time-scales from these observations. The remaining pulsars within our sample were statistically non-variable. We also explore the spectral properties of this sample and find spectral curvature in pulsars PSR J0835−4510, PSR J1752−2806, and PSR J0437−4715. |
| first_indexed | 2025-11-14T07:15:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-16193 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:15:39Z |
| publishDate | 2016 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-161932017-09-13T15:03:20Z Time-domain and spectral properties of pulsars at 154 MHz Bell, M. Murphy, T. Johnston, S. Kaplan, D. Croft, S. Hancock, P. Callingham, J. Zic, A. Dobie, D. Swiggum, J. Rowlinson, A. Hurley-Walker, N. Offringa, A. Bernardi, G. Bowman, J. Briggs, F. Cappallo, R. Deshpande, A. Gaensler, B. Greenhill, L. Hazelton, B. Johnston-Hollitt, M. Lonsdale, C. McWhirter, S. Mitchell, D. Morales, M. Morgan, E. Oberoi, D. Ord, S. Prabu, T. Udaya Shankar, N. Srivani, K. Subrahmanyan, R. Tingay, Steven Wayth, Randall Webster, R. Williams, A. Williams, C. We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range −80° < δ < 10°, we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on time-scales of minutes to years. For three of these pulsars, PSR J0953+0755, PSR J0437−4715, and PSR J0630−2834, we observe interstellar scintillation and variability on time-scales of greater than 2 min. One further pulsar, PSR J0034−0721, showed significant variability, the physical origins of which are difficult to determine. The dynamic spectra for PSR J0953+0755 and PSR J0437−4715 show discrete time and frequency structure consistent with diffractive interstellar scintillation and we present the scintillation bandwidth and time-scales from these observations. The remaining pulsars within our sample were statistically non-variable. We also explore the spectral properties of this sample and find spectral curvature in pulsars PSR J0835−4510, PSR J1752−2806, and PSR J0437−4715. 2016 Journal Article http://hdl.handle.net/20.500.11937/16193 10.1093/mnras/stw1293 Oxford University Press fulltext |
| spellingShingle | Bell, M. Murphy, T. Johnston, S. Kaplan, D. Croft, S. Hancock, P. Callingham, J. Zic, A. Dobie, D. Swiggum, J. Rowlinson, A. Hurley-Walker, N. Offringa, A. Bernardi, G. Bowman, J. Briggs, F. Cappallo, R. Deshpande, A. Gaensler, B. Greenhill, L. Hazelton, B. Johnston-Hollitt, M. Lonsdale, C. McWhirter, S. Mitchell, D. Morales, M. Morgan, E. Oberoi, D. Ord, S. Prabu, T. Udaya Shankar, N. Srivani, K. Subrahmanyan, R. Tingay, Steven Wayth, Randall Webster, R. Williams, A. Williams, C. Time-domain and spectral properties of pulsars at 154 MHz |
| title | Time-domain and spectral properties of pulsars at 154 MHz |
| title_full | Time-domain and spectral properties of pulsars at 154 MHz |
| title_fullStr | Time-domain and spectral properties of pulsars at 154 MHz |
| title_full_unstemmed | Time-domain and spectral properties of pulsars at 154 MHz |
| title_short | Time-domain and spectral properties of pulsars at 154 MHz |
| title_sort | time-domain and spectral properties of pulsars at 154 mhz |
| url | http://hdl.handle.net/20.500.11937/16193 |