Interferometric imaging with the 32 element Murchison Wide-field Array
Abstract
The Murchison Wide-field Array (MWA) is a low frequency radio telescope, currently under construction, intended to search for the spectral signature of the epoch of re-ionisation (EOR) and to probe the structure of the solar corona. Sited in Western Australia, the full MWA will comprise 8192 dipoles grouped into 512 tiles, and be capable of imaging the sky south of 40 degree declination, from 80 MHz to 300 MHz with an instantaneous field of view that is tens of degrees wide and a resolution of a few arcminutes. A 32-station prototype of the MWA has been recently commissioned and a set of observations taken that exercise the whole acquisition and processing pipeline. We present Stokes I, Q, and U images from two ~4 hour integrations of a field 20 degrees wide centered on Pictoris A. These images demonstrate the capacity and stability of a real-time calibration and imaging technique employing the weighted addition of warped snapshots to counter extreme wide field imaging distortions.
Cite
@article{arxiv.1010.1733,
title = {Interferometric imaging with the 32 element Murchison Wide-field Array},
author = {S. M. Ord and D. A. Mitchell and R. B. Wayth and L. J. Greenhill and G. Bernardi and S. Gleadow and R. G. Edgar and M. A. Clark and G. Allen and W. Arcus and L. Benkevitch and J. D. Bowman and F. H. Briggs and J. D. Bunton and S. Burns and R. J. Cappallo and W. A. Coles and B. E. Corey and L. deSouza and S. S. Doeleman and M. Derome and A. Deshpande and D. Emrich and R. Goeke and M. R. Gopalakrishna and D. Herne and J. N. Hewitt and P. A. Kamini and D. L. Kaplan and J. C. Kasper and B. B. Kincaid and J. Kocz and E. Kowald and E. Kratzenberg and D. Kumar and C. J. Lonsdale and M. J. Lynch and S. R. McWhirter and S. Madhavi and M. Matejek and M. F. Morales and E. Morgan and D. Oberoi and J. Pathikulangara and T. Prabu and A. E. E. Rogers and A. Roshi and J. E. Salah and A. Schinkel and N. Udaya Shankar and K. S. Srivani and J. Stevens and S. J. Tingay and A. Vaccarella and M. Waterson and R. L. Webster and A. R. Whitney and A. Williams and C. Williams},
journal= {arXiv preprint arXiv:1010.1733},
year = {2015}
}
Comments
Accepted for publication in PASP. This is the draft before journal typesetting corrections and proofs so does contain formatting and journal style errors, also has with lower quality figures for space requirements