ESPRESSO: Sky flat fields
|
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.
|
Relative efficiency
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.
|