MDM Observatory 2.4m Telescope Observing Report for 2026 Feb 21 Observer(s): Meghna Sitaram, Anshul Shankar Institution(s): Columbia Instrument: CHaS Worked for 11 hours (all night) Conditions were Non-Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Cirrus, Winds Calm Mid: Patchy Clouds, Winds Calm End: Cirrus, Winds Calm Observing Summary: Thin clouds all night. Opened around 7PM and observed some galaxies in the O III filter. Cloud layer thickened around 1:30AM and we took the opportunity to break from observing for ~30 minutes and switch to the new higher-redshift O III filter. Collected galaxy data through thin clouds using the new higher-redshift filter for the rest of the night. ------------------------------ Submitted on 2026 Feb 22 [6:29:53]