Observing the Sun with the Murchison Widefield Array
Abstract
The Sun has remained a difficult source to image for radio telescopes, especially at the low radio frequencies. Its morphologically complex emission features span a large range of angular scales, emission mechanisms involved and brightness temperatures. In addition, time and frequency synthesis, the key tool used by most radio interferometers to build up information about the source being imaged is not effective for solar imaging, because many of the features of interest are short lived and change dramatically over small fractional bandwidths. Building on the advances in radio frequency technology, digital signal processing and computing, the kind of instruments needed to simultaneously capture the evolution of solar emission in time, frequency, morphology and polarization over a large spectral span with the requisite imaging fidelity, and time and frequency resolution have only recently begun to appear. Of this class of instruments, the Murchison Widefield Array (MWA) is best suited for solar observations. The MWA has now entered a routine observing phase and here we present some early examples from MWA observations.
Cite
@article{arxiv.1403.6250,
title = {Observing the Sun with the Murchison Widefield Array},
author = {D. Oberoi and R. Sharma and S. Bhatnagar and C. J. Lonsdale and L. D. Matthews and I. H. Cairns and S. J. Tingay and L. Benkevitch and A. Donea and S. M. White and G. Bernardi and J. D. Bowman and F. Briggs and R. J. Cappallo and B. E. Corey and A. Deshpande and D. Emrich and B. M. Gaensler and R. Goeke and L. J. Greenhill and B. J. Hazelton and M. Johnston-Hollitt and D. L. Kaplan and J. C. Kasper and E. Kratzenberg and M. J. Lynch and S. R. McWhirter and D. A. Mitchell and M. F. Morales and E. Morgan and A. R. Offringa and S. M. Ord and T. Prabu and A. E. E. Rogers and A. Roshi and J. E. Salah and N. Udaya Shankar and K. S. Srivani and R. Subrahmanyan and M. Waterson and R. B. Wayth and R. L. Webster and A. R. Whitney and A. William and C. L. Williams},
journal= {arXiv preprint arXiv:1403.6250},
year = {2014}
}
Comments
4 pages, 3 figures, submitted for the 31st URSI General Assembly and Scientific Symposium, to be held in Bejing, China from 16-23, August, 2014