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High Resolution, Wide Field, Narrow Band, Snapshot Imaging

Carilli, C. L. and Murphy, E. and Rosero, V. and Mooley, K. and Jiménez-Andrade, E. and Golap, K. and Butler, B. (2020) High Resolution, Wide Field, Narrow Band, Snapshot Imaging. . (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20200902-121850416

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Abstract

We investigate the imaging performance of an interferometric array in the case of wide field, high resolution, narrow band, snapshot imaging. We find that, when uv-cell sizes are sufficiently small (ie. image sizes are sufficiently large), each instantaneous visibility record is gridded into its own uv-cell. This holds even for dense arrays, like the core of the next generation VLA. In this particular, application, Uniform weighting of the gridded visibilities approaches Natural weighting, with its often deleterious consequences on the resulting synthesized beam. For a core-dominated array, we show that the resulting image noise is highly correlated on scales comparable to the spatial frequencies of the core baselines. In general, this study accentuates the fact that, for imaging applications that require high resolution (Plains array and greater), many of the core antennas can be employed as a separate subarray for low resolution science, without sacrificing the quality of the high resolution science.


Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/2007.00712arXivDiscussion Paper
ORCID:
AuthorORCID
Carilli, C. L.0000-0001-6647-3861
Murphy, E.0000-0001-7089-7325
Mooley, K.0000-0002-2557-5180
Jiménez-Andrade, E.0000-0002-2640-5917
Butler, B.0000-0002-5344-820X
Additional Information:Next Generation Very Large Array Memo No. 78.
Record Number:CaltechAUTHORS:20200902-121850416
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200902-121850416
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105214
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:08 Sep 2020 23:28
Last Modified:08 Sep 2020 23:28

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