Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/26265
Title: | Time-domain and spectral properties of pulsars at 154 MHz | Authors: | Bell, M. E. Murphy, Tara Johnston, S. Kaplan, D. L. Croft, S. Hancock, P. Callingham, J. R. Zic, A. Dobie, D. Swiggum, J. K. Rowlinson, A. Hurley-Walker, N. Offringa, A. R. BERNARDI, GIANNI Bowman, J. D. Briggs, F. Cappallo, R. J. Deshpande, A. A. Gaensler, B. M. Greenhill, L. J. Hazelton, B. J. Johnston-Hollitt, M. Lonsdale, C. J. McWhirter, S. R. Mitchell, D. A. Morales, M. F. Morgan, E. Oberoi, D. Ord, S. M. Prabu, T. Shankar, N. Udaya Srivani, K. S. Subrahmanyan, R. Tingay, S. J. Wayth, R. B. Webster, R. L. Williams, A. Williams, C. L. |
Issue Date: | 2016 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 461 | Issue: | 1 | First Page: | 908 | Abstract: | 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. | URI: | http://hdl.handle.net/20.500.12386/26265 | URL: | https://academic.oup.com/mnras/article/461/1/908/2595268 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stw1293 | Bibcode ADS: | 2016MNRAS.461..908B | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Bell2016.pdf | PDF editoriale | 1.16 MB | Adobe PDF | View/Open |
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