QC documentation system: QC procedure QCocam_sci.py for OMEGACAM

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]
QCocam_qcheck.py QCocam_shutter.py QCocam_readnoise.py QCocam_lingain.py
QCocam_bias.py QCocam_dark.py QCocam_dome.py QCocam_flat.py
QCocam_std.py QCocam_sci.py
 
bottom  plots   |   contact
NAME QCocam_sci.py
VERSION 1.0 -- 2012-06-10 First draft of this QC report
SYNTAX Python
CALL measureQuality of data contained in $DFS_PRODUCT/SCIENCE/$DATE
within processQC: processQC -a $AB
explicit call: QCocam_sci.py -a [$AB_name] -e [$ext_number: 1-32] -i [$level_of_interaction: 0-2]
INSTRUMENT OMEGACAM
RAWTYPE SCIENCE (DPR.TYPE = OBJECT)
PURPOSE a) generates 4 QC reports for each OmegaCAM CCD
b) writes QC1 parameters into local QC1 database omegacam_science
PROCINPUT No input is required:
a) $DATE is read from AB
b) the primary file is set in QCocam_sci.py and is the PRO.CATG=STACK_SCIENCE product with the _0000.fits extension.
Other SCIENCE category pipeline products include: CONF_MAP_SCIENCE, SCIENCE_CATALOGUE, SIMPLE_MASK, and SIMPLE_ where can be one of: DITHER, JITTER, STARE, or OFFSET
c) raw frames are implicitly read from the AB.
d) No reference products exist for SCIENCE data.
QC1TABLE trending | table(s) in QC1 database:
omegacam_sci
TRENDPLOT trending | HealthCheck plot associated to this procedure: none
QC1PAGE trending | associated documentation:
science_QC1.html
QC1PLOTS
top

science1.png
display each of 32 STACK_SCIENCE frames on ds9 display.

science2.png
display each of 32 CONF_MAP_SCIENCE frames on ds9 display.

science3.png
display each of 32 SIMPLE_DITHER (exists for each dither/jitter/offset/stare executed in the OB. These frames, summed together give the STACK_SCIENCE frame) images on ds9 display.

science4.png
display each of 32 SIMPLE_MASK (exists for each dither/jitter/offset/stare executed in the OB. These frames, summed together give the STACK_SCIENCE frame) mask images on ds9 display.

science5.png
display each of 32 SCIENCE_CATALOGUE fits tables on skycat display.

science6.png
left: full-field image of the reduced science field of the extension listed at the top of the image.
center: full-field image of the reduced standard star field with detected USNO-A2 stars marked with blue circles. If the USNO-A2 star has an ellipticity >= 0.20 the marking circle is black.
right: a 4x zoom of the center area of the reduced science field. At the far right of these images, a number of data parameters are listed.

science7.png
top: A histogram of the FWHM measured for all detected sources having CLASS_STAR <= 0.90 and mag_auto <= 19.0.
A Gaussian fit to the FWHM histogram is shown (dotted red line) and its values indicated in the legend. The QC header SCI.SEEING is shown as a vertical green line and the corrected DIMM seeing (corrected to the wavelength of the science observation) and is shown as a vertical red line.
bottom: A histogram of the ellipticity (1 - B/A) measured for all detected sources having CLASS_STAR <= 0.90 and mag_auto <= 19.0.
A Gaussian fit to the ellipticity histogram is shown (dotted red line) and its values indicated in the legend. The QC header SCI.ELLIPTICITY is shown as a vertical green line and the critical ellipticity limit of 0.20 is marked as a red vertical line.

science8.png
The ellipticity (1 - B/A) and position angle of each detected source centered on its position. The length of each line is exaggerated by 1000x and those ellipticities above the critical threshold of 0.2 are shown in red.

science9.png
The detected source number counts log10[number/0.5 magnitudes/sqr. deg.] vs. magnitude. The median magnitude and peak magnitude is listed in the legend and the total number of detected sources is given at the top of the frame.
QC1PARAM QC1 parameters written into QC1 table(omegacam_science) 
SOURCE(header or script)     DBNAME                    value       description

 PRO.DATANCOM                datancom                   5           the number of raw files combined in pipeline processing
 QC.SCI.MATCHES              qc_sci_matches             189         number of USNO-A2 standard stars matched in science frame
 QC.SCI.RATIO.MATCHES        qc_sci_ratio_matches       0.976544    ratio of USNO-A2 matches to detected stars in field
 QC.SCI.ZEROPNT              qc_sci_zeropoint           27.8766     frame zeropoint (from STD star OB) (ADU/second of exposure time)
 QC.SCI.ZEROPNT_ELECTRON     qc_sci_zeropoint_electron  28.8766     frame zeropoint (from STD star OB) (e-/second of exposure time)
 QC.SCI.SEEING               qc_sci_seeing              0.6578      median Sextractor FWHM of detected sources with CLASS_STAR>=0.9 (arcsec)
 QC.SCI.ELLIPTICITY          qc_sci_ellipticity         0.0878      median SExtractor ellipticity of detected sources with CLASS_STAR>=0.9
 QCocam_sci.py               qc_airmass                 1.215       airmass average [(start + end)/2] (QCscript)
 QCocam_sci.p                qc_ambi_seeing             0.85        DIMM seeing average [(start + end)/2]  (arcsec) (QCscript)
 TEL.AMBI.TAU0               qc_ambi_tau0               0.00675     average coherence time (seconds)
 QCocam_sci.py               qc_ambi_pressure           743.48      observatory ambient air pressure average [(start + end)/2] (hPa) (QCscript)
 TEL.AMBI.RHUM               qc_ambi_rhum               6.56        observatory ambient relative humidity (%)
 QCocam_sci.py               qc_temp_mosaic_plate       146.5       average temperature probe of mosaic plates from DET.TLM5/8 (QC script) (Kelvin)
 TEL.AMBI.TEMP               qc_ambi_temp               14.5        ambient observatory temperature (Celsius)
ALGORITHM
CERTIF - The focus of QC for the OmegaCAM science frames is on image quality. qc_sci_seeing vs. the corrected DIMM seeing and, more importantly, the ellipticity measured over each detector (not to exceed 0.20).
- Striping is sometimes visible in detector #82 (from about 2012-05-01 to 2012-06-04).
COMMENTS OmegaCAM science frame processing and quality control is only temporarily supported from January 2012 to mid July 2012. Post July 15, 2012 no science data will be processed and OmegaCAM will be set to QC XXLight standards.
top [2015-11-05T15:16:55]         created by qcDocu v1.1.2, a tqs tool