Weather Report for June 18, 2015

Another clear and very productive night at the Kuiper Telescope. However, a major brush fire about 50 miles north of the observatory that started before noon put an amazing amount of smoke into sky by sunset. Polarimetry will not be affected, but extra effort was needed throughout the night to verify photometric measurements. In addition, it may be difficult, if not impossible to accurately calibrate the true color of flux spectra obtained on this night. The seeing varied from 1-2.5 arcsec throughout this very warm night.