The observing team at Gemini keeps a detailed log of each night's science observing, also noting weather issues, technical faults and any time spent in planned engineering. It is read by Gemini staff early each morning. A summary of the night is written at the end of observing and included at the top of each night log. That summary is posted here, unedited, to give interested users a feel for what we're doing.


Show nightlog summary for the night of:
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UT DATE NIGHT PLAN NIGHT SUMMARY
Jan 16, 2018 Multi-instrument queue observing (GMOS, NIRI, and GNIRS). Weather forecast is for excellent conditions, photometric and good seeing. We had a very successful evening. Skies remained photometric and we had terrific seeing. We observed an rToO, many band1 and band2 programs as well as one band3 program. The telescope was mostly well behaved with a few minor faults.
Jan 15, 2018 Multi-instrument queue observing GMOS, NIRI, and GNIRS. Weather forecast is for excellent conditions - clear skies and good seeing. Skies remained photometric all night. The seeing was highly variable, starting off in IQ70 and ending in IQ70, with IQ85-Any sprinkled in the middle. We observed several programs in all bands (1-4). The telescope was well behaved, with only one minor fault.
Jan 14, 2018 Multi-instrument queue observing using GMOS, NIRI, and GNIRS. Weather forecast from Friday morning is for thin cirrus to photometric and IQ70 to IQ85 conditions. Skies remained photometric throughout the evening with thin cirrus coming in at twilight. The seeing was variable; the night started in IQAny, improved to IQ85 with moments of IQAny, and ended up in really good IQ70 just before twilight. We observed several band1 and band2 programs and one band4. The telescope was very well behaved, no faults filed.
Jan 13, 2018 Multi-instrument queue observing using GMOS, NIRI, and GNIRS. Weather forecast is for poor seeing, thick clouds and a small chance of fog/precipitation. We were in thick CC80 clouds for most of the night, but they went away just after 2am which resulted in photometric conditions for the rest of the evening. We were in IQAny for the majority of the night, but saw some variability at times and as a result we were able to observe a few band1, band2, and band3 programs when conditions allowed, but we mostly observed band4. The telescope was mostly well behaved with only a few minor faults.
Jan 12, 2018 Multi-instrument queue as weather permits. Predictions say high chance for humidity and fog, and also a slight chance for precipitation, along with high clouds throughout the night. Well, the forecast couldn't have been more wrong! We had mostly photometric conditions and a dry summit after a small bout of clouds and moderate humidity at the very beginning of the night. However, the seeing went from ok to horrendous and we lost about a third of the night to band4/ weather anyway. We did manage to sneak in a couple chargeable observations before the seeing blew up, though, and there were minimal telescope faults, so not a horrible night.
Jan 11, 2018 Multi-instrument queue, weather permitting (predictions are for clouds and fog). Only one chargeable science target for 1.33 hrs, the rest of the night was band 4/ weather loss due to thick clouds.
Jan 10, 2018 Multi-instrument queue. Weather predicted to be similar to last night with moderate winds, poor seeing, and clear skies. We lucked out and got a bunch of the high priority stuff in moderate to poorish seeing before the atmosphere became atrocious. Seeing blew up in the last few hours of the night and we spend lots of time in band4.
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