BRIXIIS Observatory activities

During a short period of clear sky, i could observe comet C/2023 A3 and spectroscopic observations of Be-star: gam Cas for h-alpha region and HeI emission @ 6678 Angstrom.

cloud-free sky but with high humidity, low transparency and a bit of fogging, I still opened the observatories for comet observations and capture spectra in High resolution. Comets that were observed are: 43P, 130P, 190P, 338P, 487P, 493P, C/2021 S3, C/2022 N2, C/2023 A3, C/2023 N3 and C/2024 J2. spectra obtained are: gam Cas for H-alpha and HeI @ 6678 Angstr., Electra, Pleione, CT Cam . After midnight I closed the observatories due to fog rising too strongly

a rare clear night was the trigger to make comets and spectroscopic observations once again. I was able to observe 7 comets including: 54P, 493P, C/2021 S3, C/2022 N2, C/2022 U1, C/2023 R1, C/2023 V1. Using the 2nd observatory for high-resolution spectroscopy, 2 spectra were recorded of Be stars QR-Vul (in outburst) and pi Aqr.

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)

This evening, i could obtain some spectra and some comets during this short night. Comets that could be observed are: C/2019 T4, C/2020 R7, C/2021 S3, C/2022 U1. With the LHiReSS spectrograph i could obtain high resolution (R~15.000) spectra of Be-stars: gam Cas, 20 Vul, 25 Vul.