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Just an update - the nova was naked-eye in Moon-free skies last night (12 Apr 2015) as it rises towards a third maximum. Here's a spectrum and an image I obtained. In the image the nova is the bright star with the diffraction spikes. At this zoom in the lens used, there are normally no spikes but last night I was experimenting with cotton crosshairs in front of the lens.
Cheers -
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