OmegaCAM science data was processed and quality control checked
during the period between January 1, 2012 and July 13, 2012. However,
from July 13, 2012 OmegaCAM quality control will follow the QC XXLight
paradigm and science processing and evaluation has been
discontinued. Verification of the quality control of calibration files
is done as usual.
The OmegaCAM pipeline creates four output frames from its science
recipe (omega_science): a reduced science image coadding all input
frames within the OB (OC_SSCI_<DATE>_1_1_normal_normal_<FILTER>.fits),
a confidence map of the stacked science image
(OC_SCMS_<DATE>_1_1_normal_normal_<FILTER>.fits), a fits table
catalogue listing the detected sources for the coadded science frame
(OC_SCAT_<DATE>_1_1_normal_normal_<FILTER>.fits), individual reduced
science images (OC_SSDI_<DATE>_1_1_normal_normal_<FILTER>.fits), and a
bad pixel mask for each individual science image
The full, coadded OmegaCAM reduced science frame for
a single detector (r_SDSS filter). (PRO.CATG = STACK_SCIENCE)
The confidence map of the above coadded science frame for a single
detector (r_SDSS filter). (PRO.CATG = CONF_MAP_SCIENCE)
A single dither, single detector OmegaCAM reduced science frame (r_SDSS filter).
(PRO.CATG = SIMPLE_DITHER, SIMPLE_JITTER, SIMPLE_OFFSET, or SIMPLE_STARE)
A single dither, single detector bad pixel mask for
the above reduced science frame (r_SDSS filter). (PRO.CATG = SIMPLE_MASK).
A value of 1 indicates a bad pixel; otherwise 0.
Trending and Issues
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.
The focus of the QC for the OmegaCAM science frames is on image
quality. Along those lines qc_sci_seeing (i.e. the image FWM vs. the
corrected DIMM seeing) and qc_sci_ellipticity were monitored. Most
importantly, the ellipticity measured over each detector is not to
exceed 0.20. Striping is sometimes visible in detector #82 (from
about 2012-05-01 to 2012-06-04).