Weather Report for April 15, 2013

Finally, a photometric night. The intensive campaign for Mrk421 continues, but with a lot more photometry than during the last three nights. Observations were coordinated with Svetlana Jorstad (Boston U.) at the Lowell Observatory Perkins Telescope, so continuous coverage of Mrk421 was possible along with observations of other targets. Thanks Svetlana! As usual during this week, the seeing started out at better than 1.5 arcsec, but was generally much worse after midnight and sometimes was as bad as 3 arcsec. Like last night, it was windy and this weather feature is expected to continue until the end of the campaign 49.