i could obtain 2 spectra of Be-sterren in hoge resolutie voor H-alpha gebied: EW Lac en 12 Vul
comet and spectroscopic observations on 27 august
It promises clear skies for the whole night and the moon phase is now about 0.35, so also less disturbing. I had prepared the observatory and set up a whole programme of observations. However, around 1 a.m. the focuser refused service and further observations stopped. The following comets could still be observed: 13P, 125P, C/2019 T4, C/2021 S3, C/2021 X1, C/2022 U1, C/2023 V4. In the evening i could simultaneous obtain 2 spectra in high resolution in the H-alpha area of Be-stars: 28 Cyg ( 4 x 1200 sec exposures) en pi Aqr ( 3 x 1200 s. exposures) (observations made with C11 + LHIRESS III spectrograph with 2400 l/mm grating)
spectroscopic observations on 14 july
During this clear night, i obtained High Resolution ( R~15.000) spectra of Be-stars for the H-alpha region: V1339 Aql, V1466 Aql.
comet and spectroscopic observations on 10 july
spectroscopic observations on 7 july
During a short period of clear sky, i could obtain a high resolution spectra for H-alpha region of Be-star QR Vul.
comet and spectroscopic observations on 19 june.
the nights are now about the shortest of the year. It only gets really dark around 0:30UT. It was pretty much clear, with a cloud here and there. The 95% moon was interfering though, resulting in only an SQM in the zenith of 18.8. 2 comets: C/2019 T4 and C/2021 S3 were observed. 2 spectra of H-alpha region in high resolution, of Be stars: 58 Cyg and HD 208682 could be obtained.
comet observation on 11 june
Meanwhile, the nights here are already short and it only gets dark around 0h30, which is why I already start observations at dusk. I was able to observe comet C/2023 A3.
spectroscopic observations on 9 june
This evening I was able to obtain a spectrum from Be-ster V421 Cep.
spectroscopic observations on 26 may
Between the many showers and thunderstorms, there was a brief clearing and I was able to obtain 2 spectra with the C11 and LHIRESS III spectrograph. The 2 Be stars where a spectrum was obtained in H-alpha region and high resolution are: tet CrB and nu Cyg.
comet and spectroscopic observations on 22 may
nights are getting very short and I could only start observations of comets and spectroscopy of Be stars around 11pm. Comets I observed are: 29P, C/2023 A3, C/2023 H5. The nearly full moon is quite disturbing especially with the humid air. Spectra that could be obtained in H-alpha region and high resolution (R~~15000) are: omi Hercules and HD 175863. (data can be found in the BeSS database)
