Overview PCyg Halpha versus Vmag

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Ernst Pollmann
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Joined: Mon Sep 26, 2011 7:16 pm

Overview PCyg Halpha versus Vmag

Post by Ernst Pollmann »

Dear colleagues and P Cyg interested observers!
Our Halpha EW and Vmag monitoring (Fig. 1 & 2) shows particularly (approx.) since May 2014 (JD 2456800) the anti-correlation between this both parameters, very descriptive. That means, the level of Halpha EW depends on the brightness of the corresponding underlaying continuum (Vmag). Fig. 3 shows the Halpha EW corrected for the Vmag variations, and we can see, that the intrinsic line flux is more or less constant.
To evidence this context, we started in 2008 the AAVSO-BAV-ASPA long-term project, which will be continued. I am showing this instructive overview, in order to inform interested observers, which are not participants of the project so far.

Ernst Pollmann
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International Working Group ASPA
Active Spectroscopy in Astronomy
http://www.astrospectroscopy.de
http://www.astronomie.de/astronomische- ... troskopie/
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