QC documentation system: QC procedure qc_LIMGFLAT.sh for NACO

This documentation is intended both for QC scientists and SciOps astronomers (who may want to ignore the technical information displayed in grey).
 
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NAME qc_LIMGFLAT.sh
VERSION 1.0 -- copied from ISAAC for NACO (2002-03-12)
1.1 -- incorporated from old NACO; new name qc_LIMGFLAT.sh (2005-08-23) 1.2 -- 2017-08-30 docu reviewed
SYNTAX SHELL
CALL processQC
from $DFS_PRODUCT/LIMGFLAT/$DATE:
qc_LIMGFLAT $date $primfile "
INSTRUMENT NACO
RAWTYPE LIMGFLAT
PURPOSE compares raw and product internal lamp flat files for NACO QC assessment; the created plot is later reviewed within certifyProducts; it is stored in $DFO_PLT_DIR; it also extracts QC parameters and records them in the local qclog table; the procedure calls qc_LIMGFLAT.sh
PROCINPUT NACO MASTER_LAMP_FLAT product;
QC1TABLE trending | table(s) in QC1 database:
naco_lampflat
TRENDPLOT trending | HealthCheck plot(s) associated to this procedure:
trend_report_LAMPFLUX_S13_HC.html | trend_report_LAMPONFLUX_S13_HC.html | trend_report_GRAD_S13_HC.html
QC1PAGE trending | associated documentation:
lampflat_qc1.html
QC1PLOTS
top

qc_LIMGFLAT.png
upper left: median collapsed column (red), single column (blue), and column from reference. (of normalized master flat)
upper center: median collapsed row (red), single row (blue), and row from reference. (of normalized master flat)
upper right: alternating sequence of raw frame counts
lower left: zoom of upper left box.
lower center: cyan: row from reference, green row from current product (with bad column region),
red: column from reference minus 1, blue: current colum minus 1
lower right: histogram of the reference (red) and the current (blue) master

qc_LIMGFLAT_diff.png
full display of difference of the master with corresponding reference frame
QC1PARAM QC1 parameters written into QC1 table:
QC1db names: fpn | gain | lamp_flux | dark_std | flat_med_min | flat_med_max
flat_min | flat_max | flat_median | flat_std | flat_tot
The essential parameters are the flat raw frame counts, the lamp flux (ADU/sec) and the X-, and Y-gradient of the masterflat.
FITS key names: DET.DIT | DET.NDIT | DET.NCORRS.NAME | DET.MODE.NAME | INS.FILTER | INS.CAMERA
QC1 params created by pipeline: gain, fpn, lamp flux
QC1 params created by this procedure:statistics in four quadrants and analysis of the odd-even column effect
ALGORITHM Description of algorithms:
For description of algorithms used by the recipe see the NACO Pipeline User Manual;
odd-even column/row analysis;
- Flux values for each raw frame per quadrant and per odd and even columns are derived;
- (odd minus even) / (odd + even) is estimated for each quadrant;
- mean values for all the frames in the stack are derived;
- stdev per quadrant from all the raw frame stack is derived
CERTIF Known problems:
- occasional image of the defocused dust particle; tolerated if flux reduction less than 1%
- vignetting, especially in case of flats taken with camera S54
Reasons for rejection:
- unusual structures or patterns (unless representative of the current state of detector);
- unusual illumination or reflections
- DATANCOM lower than usual (4-6)
Also full display of the local difference, i.e. of the master with closest in time conterpart is monitored.
COMMENTS NONE
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