Weather Report for January 19, 2018


After a long absence, the blazar monitoring program begins Campaign 105 at the Steward Observatory 2.3m Bok Telescope on Kitt Peak, Arizona. In fact, it hasn't been since Campaign 94 that the mighty Bok has been visited. Campaign 105 starts off with a productive night despite most observations having to be made through cirrus clouds. The clouds were thin enough for spectropolarimetry to be relatively unaffected, but photometric measurements for most objects could not be obtained. Still, over 25 polarization measurements were made of blazars. The seeing was good all night long at 1-1.5 arcsec.