Plasma lensing models show that outer and inner caustics plus arclet brightness patterns in pulsar scintillation can constrain substructure column density gradients, sizes, and amplitudes.
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uGMRT ranks as the best current instrument for cyclic spectroscopy of pulsars, with the 80-300 MHz band optimal for most of the 312 sources examined.
Detection and measurement of an extreme scattering event toward PSR J2313+4253 yielding a scattering region at 1.04 kpc distance, 15 AU transverse size, and ~220 day duration.
SKA-Low can characterise mid-latitude ionospheric structure via multiple interferometric phase-screen and scintillation methods, with forward modelling linking observables to physical plasma conditions.
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Plasma lensing modeling of substructures on pulsar scintillation screens
Plasma lensing models show that outer and inner caustics plus arclet brightness patterns in pulsar scintillation can constrain substructure column density gradients, sizes, and amplitudes.