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• W4383616313 abstract "ABSTRACT MeerKAT imaging of the globular cluster 47 Tucanae (47 Tuc) reveals 1.28 GHz continuum emission at the locations of 20 known millisecond pulsars (MSPs). We use time series and spectral imaging to investigate the image-domain characteristics of the MSPs, and search for previously unknown sources of interest. The MSPs exhibit a range of differences in their temporal and spectral properties compared the general background radio source population. Temporal variability differs strongly from pulsar to pulsar, some appearing to vary randomly on 15 min time-scales, others varying coherently by factors of &gt;10 on time-scales of hours. The error in the typical power law fit to the spectrum emerges as a powerful parameter for indentifying the MSPs. This behaviour is likely due to differing diffractive scintillation conditions along the sightlines to the MSPs. One MSP exhibits tentative periodic variations that are consistent with modulation due the orbit of an eclipsing binary system. One radio source has spectro-temporal properites closely resembling those of the MSP population in the cluster, and we report its position as a candidate new MSP, or alternatively an interferometric localization of one of six MSPs which do not yet have an accurate position from the timing solutions." @default.
• W4383616313 created "2023-07-09" @default.
• W4383616313 creator A5016632590 @default.
• W4383616313 date "2023-07-04" @default.
• W4383616313 modified "2023-10-18" @default.
• W4383616313 title "A new pulsar candidate in 47 Tucanae discovered with MeerKAT imaging" @default.
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• W4383616313 doi "https://doi.org/10.1093/mnrasl/slad094" @default.
• W4383616313 hasPublicationYear "2023" @default.
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