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Re: Eta Orionis period with eShel spectrograph

Posted: Mon Jan 23, 2017 2:54 pm
by Ernst Pollmann
James,
all Halpha spectra are still welcome, because we are working further on the topic, how the Vmag influences the level of Halpha EW.
That means we have to collect contemporaneous data of both.

Ernst

Re: Eta Orionis period with eShel spectrograph

Posted: Sat Jan 28, 2017 10:19 am
by Olivier GARDE
Thank you James for the link.
I find also from the same author :
http://www.chara.gsu.edu/files/2007Meeting/OBrien.pdf