LINKS TO  DETAILS bias dark current	QC1 PLOTS		QC1 ASCII DATA
	PLOTS CURRENT PERIOD PREVIEW (GIF): bias | grat | wave | fib effic | lamp stab | lamp stab long DOWNLOAD (PS): bias | grat | wave | fib effic | lamp stab | lamp stab long	COMPLETE SET Year: 2003 2004 2005 2006 Item: bias grating stability wave solution rel fibre effic lamp stab lamp stab long Format: Gif Postscript	COMPLETE SET Year: 2003 2004 2005 2006 Item: bias dispersion rms resolving power fibre stability grating stability CCD: any REDU REDL BIN: 1x1 WLEN*: 520 580 860 any SLIT NUM (OBSPLATE)*: 1 2 any FIBRE ID**: 1 2 3 4 5 6 7 8 9 any SIMCAL**: 0 1 any *: not relevant for bias **: not relevant for bias and grating
		QC1 database (expert mode)	QC1 database (expert mode)

Find here detailed information about the UVES-MOS QC1 parameters and select plots and ASCII files from the QC1 database.

UVES-MOS calibration data are pipeline-processed to create calibration products. The quality of the products is measured by QC1 parameters. Most QC1 parameters are obtained by pipeline procedures; some are measured by post-pipeline recipes.

All measured QC1 parameters are stored in a database. Their evolution with time is evaluated by the trending process.

All UVES-MOS calibration products are quality-checked. While details of this process vary from case to case, some features are generally valid:

• Raw frames and master frames are displayed and visually checked for anomalies.
• When applicable, raw frames are checked for over-exposure (e.g. flats).
• The distribution of pixel values is controlled in histograms. E.g., the distribution of pixel values in BIAS frames is checked to be consistent with statistical noise.
• The product tables from format check and wavelength calibration frames are checked for number and distribution of fitted lines.

A calibration product is certified when experience shows that it measures the instrumental status in the proper way. This may mean that it complies with the expected result within certain limits. But it may also be true that it represents a valid outlier. E.g., after a realignment of a grating its X and Y shift against a reference frame will differ from the previous values, but this is a valid deviation.