Date: 2019 Mar 10 UTC Observers: Patrick Vallely and Charlotte Wood TO: Steve Allanson SA: Olga Kuhn Moon phase: Waxing Crescent (7% illumination) Summary: Clouds and wind led to intermittent observing. Unclear how useful the data obtained tonight will be due to significant clouds during nearly all of the integration time. Good practice for actually using the instruments, at least. Calibrations: None Completed Programs: OSU_monitor - I2574, N2903, N4395 ND_sn18qb - SN18qb Standard Stars: MODS - Feige 34 Details (All times UT): ---------------------------------- 01:00 - Looks pretty cloudy on the mountain (can't even see the sun), so we will not be opening at sunset. Also a bit windy. 01:30 - Running into some apparent software issues trying to run up LBC. The WarmUp and Turn ON/OFF buttons on the Power Control page are not displaying when run on obs2. They show up on obs4 though. 02:40 - Sky has cleared a tad. Assuming this isn't just a small hole in the clouds, we may open soon if wind stays at manageable levels. 03:05 - Open! Going to try and hit some OSU monitor targets. Initially having some issues with acquiring focus. 03:30 - Focused on I2574 after failing on a few higher priority targets. Going to attempt to observe. Seeing is ~2.5". Added an extra exposure because one of them clearly had a satellite/plane/something in it. They don't look very good... 03:55 - Now trying N2903 after N3344 couldn't focus. Steve estimates 1 to 2 mags of extinction from the clouds. Seeing is ~1.8" 04:50 - Now moving to N4395, as it's moderately high elevation and a short exposure. Seeing is ~1.6" or so. 05:20 - Moving to N4736. Had to abort due to wind gusts. :( Looking at the cloud patterns it seems worth configuring for MODS in case we can open again later. 06:50 - Opening up again! Going to try to hit the ND target SN18qb to balance time allocation. 07:25 - Started on SN18qb after some collimation challenges. Clouds have rolled back in a little since we re-opened, so we'll see how this goes. Looking at about 3 mag of extinction based on how faint the guide star appears. Added one extra exposure to hopefully make these still useful. 08:40 - Moving to hit a standard (Feige 34) 09:05 - Tried ASASSN-18ro, but had trouble with the guide star (too faint to get through the clouds effectively). No obvious brighter alternative we can use instead. 09:20 - Now going for ND_carbon target jy0909, which has a much brighter guide star. Guiding seems to be working, but Steve informs us it's ~5 mag of cloud extinction. 09:50 - Had to abort jy0909 and close for clouds. :( Probably just gonna hang around and see if we can get some twilight flats in the morning. 12:00 - Thick clouds and moderately windy, so no LBC flats today. Will try tomorrow if the forecasted wind and snow don't force us to stay closed.