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• W4385443274 abstract "ABSTRACT The recent development of $theta - theta$ techniques in pulsar scintillometry has opened the door for new high-resolution imaging techniques of the scattering medium. By solving the phase retrieval problem and recovering the wavefield from a pulsar dynamic spectrum, the Doppler shift, time delay, and phase offset of individual images can be determined. However, the results of phase retrieval from a single dish are only known up to a constant phase rotation, which introduces extra parameters when doing astrometry using very long baseline interferometry. We present an extension to previous $theta - theta$ methods using the interferometric visibilities between multiple stations to calibrate the wavefields. When applied to existing data for PSR B0834+06, we measure the effective screen distance and lens orientation with five times greater precision than was possible in previous work." @default.
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• W4385443274 date "2023-08-01" @default.
• W4385443274 modified "2023-10-15" @default.
• W4385443274 title "High-resolution VLBI astrometry of pulsar scintillation screens with the <i>θ - θ</i> transform" @default.
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• W4385443274 doi "https://doi.org/10.1093/mnras/stad2318" @default.
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