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The German organization for variable stars (BAV) hereby announces a monthly ZOOM meeting as a discussion platform on the subject of variable stars. Photometric-spectroscopic topics from amateur and professional observation of variables are discussed in an informal manner. Here is the link to the fir...

Who ist interested to contribute with Halpha and HeI6678 spectra to the attached monitoring?
The monitoring is dealing with the question of the disk feeding process depending of photospherical matter. Ernst Pollmann

Dear colleagues,
I hereby announce that the newest issue of the "BAV-Magazine-Spectroscopy" is now available at:
https://bav-astro.eu/images/BAV_13-2023.pdf

Ernst Pollmann

James,
that´s the reason why a group of eight observers has dedicated this object.
You are very welcome to contribute with your spectra.
Attached you will find a Fig. that shows the current state of results. Ernst

Dear Olivier,
could you be so kind to send me this spectrum via email?

Thanks in advance,
Ernst

For P Cygni observers:
update of the Halpha flux periodic behavior.
Ernst Pollmann

The newest issue of the spectroscopy magazine BAVMS has been published.
See the following link:
https://bav-astro.eu/images/BAV-Magazin ... 2-2022.pdf

Ernst Pollmann

Some professionals do not see the sole (often too willing) provision of observation data as a reason for co-authorship. They are eager to get dates from us, and that's about it in many cases. One more reason for "professional amateurs" to scientifically interpret and publish their own data...

The last periastron passage took place on 2022-11-15 (JD 2459898.7).
The new observation data of A. Leduc, E. Bertrand, B. Hanisch, J. Martin, A. Stiewing, E. Pollmann enables an actualized of the orbital period of the companion (see attachment).
Ernst Pollmann

Pete,
yes, I received it.
Please let´s communicate via eMail, that´s more comfortable from my side.
Ernst