New methods for ALMA angular-scale-based observation scheduling, quality assessment, and beam shaping II

Author(s): Dirk Petry, María Díaz Trigo, Rüdiger Kneissl, Ignacio Toledo, Atsushi Miyazaki, Toshinobu Takagi, Ashley Barnes, Francesca Bonanomi
Abstract: The Atacama Large Millimeter/submillimeter Array remains the largest mm radio interferometer observatory world-wide. It is now conducting its 11th observing cycle. In our previous paper presented at this conference series in 2020, we outlined a number of possible improvements to the ALMA end-to-end observing and data processing procedures which could further optimize the uv coverage and thus the image quality while at the same time improving the observing efficiency. Here we report an update of our results refining our proposed adjustments to the scheduling and quality assurance processes. In particular we present new results on ways to assess the uv coverage of a given observation efficiently, methods to define and measure the maximum recoverable angular scale, and on the robustness of the deconvolution in the final interferometric imaging process w.r.t. defects in the uv coverage. Finally, we present the outline of a design for integrating uv coverage assessment into the control and processing loop of observation scheduling. The results are applicable to all radio interferometers with more than approx. ten antennas.
Organisation(s): Department of Astrophysics
External organisation(s): European Southern Observatory (Germany), Joint ALMA Observatory, Japan Space Forum
Volume: 13098
No. of pages: 12
DOI: https://doi.org/10.1117/12.3012662
Publication date: 07-2024
Peer reviewed: Yes
Austrian Fields of Science 2012: 103003 Astronomy, 103004 Astrophysics
Keywords
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
Portal url: https://ucrisportal.univie.ac.at/en/publications/2bfb2854-ecfe-404e-a11b-22e81bf8969e

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