Long-term Observations of Three Nulling Pulsars

Abstract

We present an analysis of approximately 200 hours of observations of the pulsars J1634$-$5107, J1717$-$4054 and J1853$+$0505, taken over the course of 14.7 yr. We show that all of these objects exhibit long term nulls and radio-emitting phases (i.e. minutes to many hours), as well as considerable nulling fractions (NFs) in the range $\sim 67\%-90\%$. PSR J1717$-$4054 is also found to exhibit short timescale nulls ($1-40P$) and burst phases ($\lesssim 200P$) during its radio-emitting phases. This behaviour acts to modulate the NF, and therefore the detection rate of the source, over timescales of minutes. Furthermore, PSR J1853$+$0505 is shown to exhibit a weak emission state, in addition to its strong and null states, after sufficient pulse integration. This further indicates that nulls may often only represent transitions to weaker emission states which are below the sensitivity thresholds of particular observing systems. In addition, we detected a peak-to-peak variation of $33\pm 1\%$ in the spin-down rate of PSR J1717$-$4054, over timescales of hundreds of days. However, no long-term correlation with emission variation was found.

10 pages, 8 figures, accepted for publication in MNRAS

References in corpus (12)

• TEMPO2, a new pulsar timing package. I: Overview
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• Switched magnetospheric regulation of pulsar spin-down
• A periodically active pulsar giving insight into magnetospheric physics
• Pulsar Nulling and Mode Changing
• New pulsar rotation measures and the Galactic magnetic field
• The population of pulsars with interpulses and the implications for beam evolution
• Radio and X-ray observations of the intermittent pulsar J1832+0029
• Constraints on viewing geometries from radio observations of $\gamma$-ray-loud pulsars using a novel method
• On the Apparent Nulls and Extreme Variability of PSR J1107-5907
• The Three Discrete Nulling Timescales of PSR J1717-4054

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• Meterwavelength Single-pulse Polarimetric Emission Survey III: The Phenomenon of Nulling in Pulsars
• Two long-term intermittent pulsars discovered in the PALFA Survey
• PSR J1926-0652: A Pulsar with Interesting Emission Properties Discovered at FAST