Quality Control and
Data Processing

HC PLOTS
Relative efficiency
QC1 database (advanced users): browse | plot

Sky flat fields are observed before sunset in order to measure the relative efficiency of the fibre system. They are measured on a monthly basis in HR with 1x1 and 2x1 binning and in UHR with 1x1 binning. Observations in MR are not yet regularly executed.

Sky flat field. Example raw frame for the blue detector.

QC1_parameters

FITS key	QC1 database: table, name	definition	class*	HC_plot**	more docu
none	espresso_skyflat..releff_avg	average relative efficiency of fibre B vs. fibre A	HC		[docuSys coming]
*Class: KPI - instrument performance; HC - instrument health; CAL - calibration quality; ENG - engineering parameter **There might be more than one.

Trending

The relative efficiency is trended separately for the five different combinations of resolving power and binning: HR with 1x1 and 2x1 binning, UHR with 1x1 binning, and MR with 4x2 and 8x4 binning.

Scoring&thresholds Relative efficiency

Scoring is not yet implemented.

History

No particular events.

Algorithm Relative efficiency

The pipeline calculates the dispersed relative efficiency of fibre B compared to fibre A for each spectroscopic order. The QC parameter is the average over all wavelengths bins and orders. It is calculated by the QC procedure.