MDM Trouble Report for 2014 Jan 02 Telescope: 2.4m Observer(s): Gianninas (University of Oklahoma) Instrument: CCDS Problem(s) Encountered: 1. Upon slewing to a northern object (Dec ~ +66) at a large hour angle (~ -6 hr) I could not find my target so decided to slew to a nearby bright star. Though the bright star was quite close by, it seems the telescope decided to slew the long way around and it eventually stopped slewing before reaching the bright star. I went out into the dome and saw that the telescope was seemingly about as low as it can go pointing north. I concluded that it must have reached a slew limit. I then tried to slew back to zenith but the telescope would still not move. I then noticed the green start button on the TCS box was not lit. I pressed it but the light would only stay on while pressed. Consequently, the telescope only moved while I kept it pressed. Once it was getting close to zenith, I let go of the start button and the TCS stayed on. Once at zenith I was successfully able to reset the pointing and continue observing. This incident occurred twice and I lost about 1 hour in the process. 2. The above problem somehow also affected the CCD. All the spectra I obtained after the first occurence of the above pointing issue contained tightly clustered glitches (or spikes) in the spectral trace. As I was trying to get back on track after the pointing problem I did not notice this immediately. After several spectra I slewed to zenith and checked CCDS. I could not see any obvious loose cables or other issues that could explain the problem with the spectra. As twilight began I stopped observing and proceeded to shut down. I then took several test images (bias, flat and lamps) but all of these images seemed fine. These test images are in /data/hiltner/ and are called g.*.fits. In the subdirectory /2014_01_02/ the problem images start with g.0402 and end with g.0410. I was unable to ascertain what caused this problem. ------------------------------ Submitted on 2014 Jan 3 [7:57:27]