Weather Report for May 21, 2015

Cirrus clouds covered the sky all night long. There were occasional thinning of the clouds, which permitted spectropolarimetry of the brighter blazars, but it was a slow process probing past the soup. In general, the seeing was around 2 arcsec. Over a half dozen blazars were observed, but for most, the signal-to-noise of the measurements will not be as high as is typical for these objects.