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17th of May 2024
Plots of amplitude versus frequency for the 36 ASKAP beams, showing the impact of coronal mass ejections.
Impact of recent coronal mass ejections on ASKAP data
by Vanessa Moss
The recent auroral light show viewed around the world (except in Sydney, where optimal weather conditions are anti-correlated with the timing of celestial events) was triggered by intense solar activity alongside a number of coronal mass ejections (CMEs). The ASKAP radio telescope is no stranger to the impact of solar emission at radio wavelengths, and we have observed an increasing amount of solar interference in recent years as the Sun heads towards solar maximum. This gif showed a few recent examples of raw ASKAP data: 1) no Sun (night observation), 2) "normal" Sun during regular amounts of solar activity, and 3) the impacts of these aurora-inducing CMEs on ASKAP data. Amplitude as a function of frequency (MHz) is shown for all beams, with higher amplitude (redder) lines corresponding to short baselines and lower amplitude (purple) lines corresponding to long baselines. (Credit: Vanessa Moss/ARWEN)

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