KPI plot for absolute efficiency as derived from standard star observations.
Values are corrected for extinction and but <b>not</b> for losses due to the fibre size.</font><p><font size="2">

The KPI reference values are based on measurements during commissioning in 2018
as reported in the User Manual v1.3. They are 4%, 9%, and 9% for
UHR, HR, and MR, respectively.