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chi Cyg 8th August 2016


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About this observation
Andy Wilson
Time of observation
08/08/2016 - 21:58
chi Cyg
Observing location
Yatton, Somerset
Altair Astro RC 250
Lhires III spectrograph 2400 l/mm
1800 seconds

Spectrum of chi Cyg from 8th August compared with a similar spectrum from 2nd June. chi Cyg brightened from just below 10th mag to nearly 7th mag over this time period and is shrinking as it brightens. I am looking for the appearance of the H alpha emission line. This should be appear near maximum light and is related to a hypersonic shock wave that passes through the photosphere.

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