QC documentation system: QC procedure QCocam_readnoise.py for OMEGACAM

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QCocam_qcheck.py QCocam_shutter.py QCocam_readnoise.py QCocam_lingain.py
QCocam_bias.py QCocam_dark.py QCocam_dome.py QCocam_flat.py
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NAME QCocam_readnoise.py
VERSION 1.0 -- 2012-06-10 First draft of this QC report
SYNTAX Python
CALL measureQuality of data contained in $DFS_PRODUCT/BIAS_READNOISE/$DATE
within processQC: processQC -a $AB
explicit call: QCocam_readnoise.py -a [$AB_name] -i [$level_of_interaction: 0-2]
INSTRUMENT OMEGACAM
RAWTYPE BIAS_READNOISE (DPR.TYPE = BIAS,READNOISE)
PURPOSE a) generates 1 QC report for ALL OmegaCAM CCD's
b) writes QC1 parameters into local QC1 database omegacam_readnoise
PROCINPUT No input is required:
a) $DATE is read from AB
b) the primary file is set in QCocam_readnoise.py and is the PRO.CATG=READNOISE_ADU product with the _0000.fits extension.
c) raw frames are implicitly read from the AB.
d) All reference products: READNOISE_ADU is found and read in from $DFO_ROOT_DIR_FC/calib/references/READNOISE/.
QC1TABLE trending | table(s) in QC1 database:
omegacam_readnoise
TRENDPLOT trending | HealthCheck plot(s) associated to this procedure:
trend_report_BIAS_readnoise_HC.html
QC1PAGE trending | associated documentation:
readnoise_QC1.html
QC1PLOTS
top

readnoise1.png
Read-out noise QC report for all detectors:
top: displays the level of the read-out noise (in ADU) for each of the 32 OmegaCAM detectors. The blue points are for the current read-out noise frame, while the red points are the reference values. The median RON level is indicated as a blue line (current value) and as a red line (reference value) and are listed in the frame legend. The shaded green area indicates the +/- 1 sigma value of the RON for all current detectors.
bottom: a read-out noise histogram indicating the RON (in ADU) vs. the number of detectors having this read noise. The blue histogram indicates the current read noise frame, while the red histogram is the reference frame.
QC1PARAM QC1 parameters written into QC1 table(omegacam_readnoise) 
SOURCE(header or script)   DBNAME                  value       description

 PRO.DATANCOM              datancom                2           number of raw files combined in pipeline processing
 QC.READNOISE              qc_ron                  2.456733    detector read-out noise (ADU)	
 QC.READNOISE.MEDIAN.DIFF  qc_ron_med_diff         0.231100    median difference between the two bias frames (ADU)	
 QC.READNOISE.MEAN.DIFF    qc_ron_mean_diff        0.43546     mean difference between the two bias frames (ADU)	
 QCocam_bias.py            qc_temp_mosaic_plate    146.5       average temperature probe of mosaic plates from DET.TLM5/8 (QC script)	
 QC.RAW.BIAS1.MIN          qc_raw_bias1_min        265.5       minimum level of first raw bias (ADU)	
 QC.RAW.BIAS1.MAX          qc_raw_bias1_max        450.5       maximum level of first raw bias (ADU)	
 QC.RAW.BIAS1.MEAN         qc_raw_bias1_mean       277.3       mean level of first raw bias (ADU)	
 QC.RAW.BIAS1.MEDIAN       qc_raw_bias1_median     276.2       median level of first raw bias (ADU)	
 QC.RAW.BIAS1.STDEV        qc_raw_bias1_stdev      2.34        standard deviation of first raw bias (ADU)	
 QC.RAW.BIAS2.MIN          qc_raw_bias2_min        265.5       minimum level of second raw bias (ADU)	
 QC.RAW.BIAS2.MAX          qc_raw_bias2_max        450.5       maximum level of second raw bias (ADU)	
 QC.RAW.BIAS2.MEAN         qc_raw_bias2_mean       277.3       mean level of second raw bias (ADU)	
 QC.RAW.BIAS2.MEDIAN       qc_raw_bias2_median     276.2       median level of second raw bias (ADU)	
 QC.RAW.BIAS2.STDEV        qc_raw_bias2_stdev      2.34        standard deviation of second raw bias (ADU)
ALGORITHM Description of algorithms:
qc_ron: the read-out noise is determined from a pair of zero-second bias exposures. The rms scatter of the difference frame of these two bias exposures (divided by sqrt(2)) is the read noise in ADU.
qc_ron_med_diff: the median value of the difference between the two bias frames (ADU).
qc_ron_mean_diff:the mean value of the difference between the two bias frames (ADU).
qc_raw_bias1_min/max/mean/median/stdev: the statistics of the first bias frame in the read-out noise template (ADU). The intent is to monitor these basic parameters for the less stable detectors, in particular, ESO_CCD_#82. See, for example, the trending plots give in BIAS_ron_select. qc_raw_bias2_min/max/mean/median/stdev: the statistics of the second bias frame in the read-out noise template (ADU). The intent is to monitor these basic parameters for the less stable detectors, in particular, ESO_CCD_#82.
CERTIF - The read-out noise for all OmegaCAM detectors should be below 2.5 ADU (detector #95 being the exception), and should not vary by more than +/- 0.3 ADU from its reference values.
- A sudden change in the read noise level of any detector should be reported to Paranal.
COMMENTS The OmegaCAM readnoise template is normally taken daily and consist of a pair of zero-second (bias) exposures.
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