QC PLOTS
	CURRENT	HISTORY
Daily Health Checks:
Echelle RESOLUTION
Echelle wave parameters BLUE 437.0, plot a
same, plot b
Echelle wave parameters REDU 580.0, plot a
same, plot b
Echelle wave parameters REDL 580.0, plot a
same, plot b
QC1 uves_wave database (advanced users): browse | plot
Click on CURRENT to see the last trending (Health Check).    Click on HISTORY to see the historical evolution of the trending.

This set of HC plots monitors the quality of the wavelength calibration solution. It is based on QC1 parameters of two sets of WAVECAL data, 1 set in BLUE mode and 1 set in RED mode, each set comprising a single RAW frame. The two sets are acquired in a two different wavelength setting covering the two arms.

Modes  

Parameters are measured for all three CCDs separately (BLUE, REDL, REDU). They are available from a set of daily arclamp exposures in the two settings BLUE 437 and RED 580 and with slit widths 0.4 and 0.3 arcsec, resp. These are used to monitor the resolving power of UVES.

top QC1 parameters

QC1 parameters: resolving power, dispersion, line intensity

QC1 parameters measured are:

• resolving power R (resol_med): Gauss fit to selected lines, median of FWHM
• standard deviation of the dispersion solution, resid_rms: least-square fit of X position of selected lines, standard deviation of residuals
• minimum and maximum wavelength
• minimum and maximum order
• number of lines selected.

The quality of the dispersion solution is measured by the standard deviation of the difference between the found and fitted position, evaluated for all selected lines. Typically 300 - 1000 lines are selected per CCD.