MDM Observatory 2.4m Telescope Observing Report for 2025 Mar 24 Observer(s): Laura Hunter, Sasha Campana Institution(s): Dartmouth Instrument: OSMOS Worked for 9 hours (all night) Conditions were Non-Photometric most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: Beg: Seeing 1.3 arcsec, Clear, Winds Light & Variable Mid: Seeing 1.3 arcsec, Clear, Winds Light & Variable End: Seeing 2.6 arcsec, Clear, Winds Moderate Observing Summary: We took OSMOS spectra of low surface-brightness galaxies for the whole night. At the beginning of the night, the guider probe refused to move, and we had to cycle the MIS system. Very good conditions at the beginning of the night, then wind caused some guiding issues. ------------------------------ Submitted on 2025 Mar 25 [19:07:20]