This is the trending report for UVES QC parameters derived from standard star observations.

UVES flux standard stars are observed for two purposes: for flux calibration, with a frequency of approximately once per 3 days during nighttime, and for system efficiency monitoring approximately once per 14 days. In both cases observations are made in 3 dichroic settings: DI1 346+580, DI1 390+564 and DIC#2 437+860. The CCD readout mode is always 225kHz,1x1,low. Observations are made with a 5 or a 10 arcsec slit. The measured efficiency is then the maximum efficiency at the center of an order closest to the central wavelength of the wavelength setting.

The individual plots describe the measured efficiency for the three wavelength settings DI1 564, DI1 580, and DI2 860, for the RED LOWER chip (upper panel) and the RED UPPER chip (lower panel).

These reports are not scored since an outlier might be due to bad atmospheric conditions rather than indicate an issue with the instrument. Interpretation of the reports requires knowledge of the actual conditions during the night.

Find more information about UVES Efficiency monitoring here.