Weather Report for September 19, 2015

An unbelievably great sunset this evening, but a price had to be paid for the show when it became dark. The sky was marred by moderate to thick cirrus all night long. Observations were made through the clouds all night except from 0100-0400 local time, when the soup was too thick. It ended up being an unexpectedly productive night, with over a dozen blazars successfully measured for polarization. No photometry could be obtained. Seeing was around 1.5 arcsec.