Check CPU LOAD monitor. No light on chip Bonnette mirror is in the way. Telescope mirror cover is not open. Dome is occulting the beam. Quite often, messages transmitted at the end of the night via the recording machine and night report do not contain the necessary information for us to decide if some technical action is needed during the day.
Proper communication is the best way to ensure that problems are fixed quickly.
This manual contains many of the critical bits and pieces of information she gathered along the years. Chris Clark has provided the latest information on the CCDs. John Kerr, Steve Smith and Jim Wright have provided detailed information on the Data Acquisition system. Many staff and visiting astronomers have contributed to various aspects of this manual, not the least being the CCD photometric coefficients. Acknowledgments of Version 2 I wish to thank Phil Cizdziel and Dan McKenna for the latest information on CCD's.