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PRECL: A new method for interferometry imaging from closure phase

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arxiv 1603.07078 v2 pith:BOTCSCBF submitted 2016-03-23 astro-ph.IM

PRECL: A new method for interferometry imaging from closure phase

classification astro-ph.IM
keywords phaseclosuremethodpreclphasesimagingproposedvisibility
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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For short-wavelength VLBI observations, it is difficult to measure the phase of the visibility function accurately. The closure phases are reliable measurements under this situation, though it is not sufficient to retrieve all of the phase information. We propose a new method, Phase Retrieval from Closure Phase (PRECL). PRECL estimates all the visibility phases only from the closure phases. Combining PRECL with a sparse modeling method we have already proposed, imaging process of VLBI does not rely on dirty image nor self-calibration. The proposed method is tested numerically and the results are promising.

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