Weather Report for December 27, 2016

Merry Christmas to all blazar enthusiasts. Observing campaign 90 starts off at the Kuiper Telescope on Mt. Bigelow, Arizona, with a very productive night. Thin cirrus had to be tolerated throughout much of the night. It never slowed the spectropolarimetry very much, but prevented a fair amount of photometry. The sky was generally clearer during the last half of the night than in the first half. The seeing was 1.5-2 arcsec. Well over 20 observations of blazars were made, including multiple measurements of CTA102, which still seems to be about the brightest quasar in the sky.