The Thousand-Pulsar-Array programme on MeerKAT – III. Giant pulse characteristics of PSR J0540−6919

Geyer, M.; Serylak, M.; Abbate, F.; Bailes, M.; Buchner, S.; Chilufya, J; Johnston, S.; Karastergiou, A.; Main, Robert; Straten, W. van; Shamohammadi, Mohsen

doi:10.1093/mnras/stab1501

Cited by 40 publications

(24 citation statements)

References 71 publications

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“…Other magnetars (Pearlman et al 2018;Wharton et al 2019) and pulsar giant pulses (see e.g. Karuppusamy et al 2010;Geyer et al 2021) can as well occur multiple times within a rotational period, which produces bimodality in the waittimes, similar to the one we see in FRB 121102. Apart from these similarities magnetars emit in radio only in parts of their rotational phase (Pearlman et al 2018), while no such rotational period has been found in FRB 121102 (Zhang 2018;Cruces et al 2021;Aggarwal et al 2021;Li et al 2021b;Hewitt et al 2021, and Section 4.5).…”

Section: Rates and Wait-timessupporting

confidence: 64%

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

Spitler¹,

Nimmo²,

Hewitt³

et al. 2022

Preprint

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We present 849 new bursts from FRB 20121102A detected with the 305-m Arecibo Telescope. Observations were conducted as part of our regular campaign to monitor the activity and evolution of burst properties. The 10 reported observations were carried out between 1150 and 1730 MHz and fall in the active period around November 2018. All bursts were dedispersed at the same dispersion measure and are consistent with a single value of (562.4 ± 0.1) pc cm −3 . The burst rate varies between 0 bursts and 218 ± 16 bursts per hour, the highest rate observed to date. The times between consecutive bursts show a bimodal distribution. We find that arrival times with separations > 0.1 s are best described as a Poisson process with varying rate, compared to models with additional parameters. Clustering on time-scales of 22 ms is reflecting a characteristic time-scale of the source and possibly the emission mechanism. We analyse the spectro-temporal structure of the bursts by fitting 2D Gaussians with a temporal drift to each sub-burst in the dynamic spectra. We find a linear relationship between the sub-burst's drift and its duration. At the same time the drifts are consistent with coming from the sad-trombone effect. This has not been predicted by current models. The energy distribution shows an excess of high energy bursts and is insufficiently modeled by a single power-law even within single observations. We find long-term changes in the energy distribution and the average spectrum compared to earlier and later published observations. Finally, despite the large burst rate we find no strict short-term periodicity.

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Section: Rates and Wait-timessupporting

confidence: 64%

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

Spitler¹,

Nimmo²,

Hewitt³

et al. 2022

Preprint

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“…We observe 61% of the MkII GPs to be confined to the leading pulse phase (𝜙) range 0.473 ≤ 𝜙 ≤ 0.502 and the remaining 39% to be in the trailing phase range 0.541 ≤ 𝜙 ≤ 0.567. This preference of the leading over the trailing pulse phase window is similar to what is observed in J0540−6919 (Geyer et al 2021) and contrary to other systems where the GPs lag the normal emission.…”

Section: Giant Pulsessupporting

confidence: 84%

Radio and X-ray observations of giant pulses from XTE J1810-197

Caleb,

Rajwade,

Desvignes

et al. 2021

Preprint

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We present the results of two years of radio and X-ray monitoring of the magnetar XTE J1810−197 since the radio re-activation in late 2018. Single pulse analysis of radio observations from the Lovell and MkII telescopes at 1564 MHz and the Effelsberg telescope at 6 GHz has resulted in the detection of a total of 91 giant pulses (GPs) between MJDs 58858 and 59117. These GPs appear to be confined to two specific phase ranges (0.473 ≤ 𝜙 ≤ 0.502 and 0.541 ≤ 𝜙 ≤ 0.567). We also observe that the first detection of GP emission corresponds to a minimum in the spin-down rate. Simultaneous radio and X-ray observations were performed on MJDs 59009 and 59096. The 0.5-10 keV X-ray spectrum from NICER is well characterised by a two component blackbody model that can be interpreted as two hot spots on the polar cap of the neutron star. The blackbody temperature decreases with time, consistent with the previous outburst, while the change in the pulsed fraction does not follow the same trend as was seen in the previous outburst. The radio and X-ray flux of XTE J1810−197 are correlated during the initial phase of the outburst (MJD 58450-MJD 58550) and an increase in the radio flux is observed later that may be correlated to the onset of GPs. We argue that the disparity in the evolution of the current outburst compared to the previous one can be attributed to a change in geometry of the neutron star.

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“…The radio profile consists of two broad components and the overall pulse width is extremely wide. The polarisation is unusually low for such a high E pulsar and the swing of PA is remarkably flat across the entire pulse width (Geyer et al 2020). J0631+0646 (Figure 1): The pulsar was first discovered in γ-rays by Clark et al (2017) and subsequently as a weak radio pulsar by Wu et al (2018).…”

Section: Pulsar Profilesmentioning

confidence: 98%

The Thousand-Pulsar-Array programme on MeerKAT IV: Polarisation properties of young, energetic pulsars

Serylak,

Johnston,

Kramer

et al. 2020

Preprint

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We present observations of 35 high spin-down energy radio pulsars using the MeerKAT telescope. Polarisation profiles and associated parameters are also presented. We derive the geometry for a selection of pulsars which show interpulse emission. We point out that, in several cases, these radio pulsars should also be seen in γ-rays but that improved radio timing is required to aid the high-energy detection. We discuss the relationship between the width of the radio profile and its high-energy detectability. Finally, we reflect on the correlation between the spin-down energy and the radio polarisation fraction and the implications this may have for γ-ray emission.

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The Thousand-Pulsar-Array programme on MeerKAT – III. Giant pulse characteristics of PSR J0540−6919

Cited by 40 publications

References 71 publications

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

Radio and X-ray observations of giant pulses from XTE J1810-197

The Thousand-Pulsar-Array programme on MeerKAT IV: Polarisation properties of young, energetic pulsars

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