QC documentation system: QC procedure vimos_imgscrflt.py for VIMOS

This documentation is intended both for QC scientists and SciOps astronomers (who may want to ignore the technical information displayed in grey).   HOME   CRIRES FORS1 FORS2 KMOS NACO   GIRAFFE UVES XSHOOTER   ISAAC SPHERE VIMOS VISIR   HAWKI MUSE SINFONI   AMBER MIDI PIONIER   OMEGACAM VIRCAM [best viewing with style sheets and javascript enabled] vimos_bias.py vimos_dark.py vimos_detlin.py vimos_mask2ccd.py vimos_imgskyflt.py vimos_imgscrflt.py vimos_astimg.py vimos_stdimg.py vimos_nightzp.py vimos_moscal.py vimos_stdmos.py vimos_ifucal.py vimos_stdifu.py vimos_sciimg.py vimos_scimos.py vimos_sciifu.py   bottom  plots   |   contact NAME vimos_imgscrflt.py VERSION 1.0 -- change from MIDAS to Python (February 2010) 1.0.1 -- updating qcDocu description (2011-03-07) 1.0.2 -- skip call of scoreQC (2011-05-31) 1.0.3 -- create cover sheet (2011-08-30) 1.0.4 -- changes needed for muc (2013-02-07) 1.0.5 -- changes for qc_mstplt v1.4 (2014-01-15) 1.0.6 -- changes for qc_mstdisp v1.3 (2014-01-20) 1.0.7 -- remove usage of has_key dictionary attribute (2014-03-24) SYNTAX PYTHON CALL processQC from $DFS_PRODUCT/SFLAT_IMG/$DATE /home/vimos/python/vimos_imgscrflt.py -i -a $AB INSTRUMENT VIMOS RAWTYPE SFLAT_IMG PURPOSE QC check on raw and product imaging lamp flats PROCINPUT products: IMG_MASTER_SCREEN_FLAT raw frames: first raw frame reference IMG_MASTER_SCREEN_FLAT QC1TABLE trending | table(s) in QC1 database: vimos_scrflat TRENDPLOT trending | HealthCheck plot(s) associated to this procedure: trend_report_FLT_UB_HC.html | trend_report_FLT_VR_HC.html | trend_report_FLT_Iz_HC.html | trend_report_GAIN_HC.html | trend_report_NOISE_HC.html QC1PAGE trending | associated documentation: scrflat_qc1.html QC1PLOTS top scrflat1.png left: first input raw frame middle: current IMG_MASTER_SCREEN_FLAT right: comparison to reference master flat scrflat2.png left: first input raw frame (central area) middle: current IMG_MASTER_SCREEN_FLAT (central area) right: comparison to reference master flat (central area) scrflat3.png cuts through current master and reference, histograms, comparison to reference QC1PARAM QC1 parameters written in QC1 database: QC1 DB names: median_master | sigma_master | efficiency | fixp_noise | photon_noise | structure | conad_avg | sig_conad_avg All parameters are calculated by the pipeline recipe. ALGORITHM Description of algorithms: median_master: median of the 1600x1800 central pixels of IMG_COMBINED_SCREEN_FLAT sigma_master: standard deviation of the 1600x1800 central pixels of IMG_COMBINED_SCREEN_FLAT efficiency: median of the 1600x1800 central pixels of the first input raw frame divided by exposure time fixp_noise: standard deviation of the 1600x1800 central pixels of the difference of the first and second raw input flat, with the second shifted by 10x10 pixels; photon_noise is quadratically subtracted photon_noise: standard deviation of the 1600x1800 central pixels of the difference of the first two raw frames, divided by sqrt(2) structure: standard deviation of the 1600x1800 central pixels of the first input raw flat with fixp_noise and photon_noise quadratically subtracted conad_avg: conversion factor from ADU to electrons (e/ADU). The difference frame of the first two input raw frames is computed and the variance (square of standard deviation) of the difference frame is calculated; the 1600x1800 central region is divided into 16x18 boxes with 100x100 pixels; for each box, the median is calculated and divided by (2 x variance); the median value of the results from all boxes is the gain factor, which is 1/CONAD sig_conad_avg: standard deviation of the 16x18 CONAD values, divided by sqrt(16x18) CERTIF Imaging lamp flats are not used for data reduction; they are used for trending CONAD, noise parameters, and filter performance. In case of lamp failures, affected QC1 DB entries would have to be cleaned. COMMENTS none top [2016-03-11T12:31:15]         created by qcDocu v1.1.2, a tqs tool