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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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