The excess absorption at 7699A from neutral potassium has now reached the same level as when I first detected it above the noise on 24th May 2009 (0.03A EW) See attached for the evolution over the past 2 months. Eps Aur is better placed currently though and my equipment has improved over the past 3 years so it should be possible to track it a bit further before it finally disappears into the noise.
Cheers
Robin
eps Aur - 7699A line status
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eps Aur - 7699A line status
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
http://www.threehillsobservatory.co.uk