Imaging

The focus pyramid was re-calibrated with data taken on good seeing nights in September 2009. The re-calibrated pyramid was tested in February 2010 and we found a different offset between the WF and HR camera (+150 units vs +90 before). The reason for this may be the lower data quality used in the first calibration, but this needs confirmation.

To facilitate dome flat field and quality control observations a light regulator for the dome light from the control room was installed, but it did not worked well as the light level was very unstable. New electronics were installed, but this still needs to be tested.

Finally useful data was obtained in JHKs in June of a suitable field in very good seeing to define the optical distortion of the WF camera. The analysis of this data is pending.