Wed, 01/20/2021 - 10:09
Some observer uses for their P Cyg observation, spectrographs with spectral resolution (R) lower than 10000.
These spectra are not helpful for the AAVSO-project, described at:
https://www.aavso.org/apps/jaavso/article/3590
Spectra for this project should have a R better than 10000.
It would be great, if interested observers could take into accout this requirement.
Ernst Pollmann