MDM Observatory 2.4m Telescope Observing Report for 2023 Oct 20 Observer(s): M. Sitaram, M. Messere, D. Schiminovich Institution(s): Columbia University Instrument: CHaS Worked for 11 hours (all night) Conditions were Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Clear, Winds Calm Mid: Clear, Winds Calm End: Clear, Winds Calm Observing Summary: Conducted some flexure testing in the O III channel in the beginning of the night and then collected great commissioning data on some galaxies and nebulae. Overall, telescope and instrument performed well though there were again some issues with the dome tracking. (The dome azimuth reading did not reflect the actual dome position.) Nice weather all night. ------------------------------ Submitted on 2023 Oct 21 [6:09:18]