Another excellent night, with photometric skies until about 0400 local time
and seeing of 1-1.5 arcsec.
Scattered, very light cirrus started moving over the observatory during
the last two hours of the night. The appearance of these clouds did not
slow polarimetry, but ended a streak of nearly five full photometric nights
in a row. The forecast is for more clouds to move across the area for the
next day and then things should clear out again.