Time-domain and spectral properties of pulsars at 154 MHz
- 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, G.
- 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.
DOIAbstract
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 int...
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