rdx.rst

Basic Reduction Assessments

Analysis class: :class:`~mangadap.proc.reductionassessments.ReductionAssessment`

Reference root: see :class:`~mangadap.config.analysisplan.AnalysisPlan.common_path`; $MANGA_SPECTRO_ANALYSIS/$MANGADRP_VER/$MANGADAP_VER/common/[PLATE]/[IFUDESIGN] for MaNGA

Reference file: see :class:`~mangadap.proc.reductionassessments.ReductionAssessment.default_paths`; manga-[PLATE]-[IFUDESIGN]-[RDXQA].fits.gz for MaNGA

Optional Parameters: see :ref:`plan`. The table below lists the parameters defined by :class:`~mangadap.proc.reductionassessments.ReductionAssessmentDef`

Important class dependencies:

• :class:`~mangadap.datacube.datacube.DataCube`: Base class that provides the datacube to be assessed.

Algorithm:

• Ignore any pixels that are either masked by the boolean mask or flagged with the flags returned by :func:`~mangadap.datacube.datacube.DataCube.do_not_use_flags`.
• Compute sky coordinates of each spaxel using :func:`~mangadap.datacube.datacube.DataCube.mean_sky_coordinates`. (SPX_SKYCOO in MAPS file)
• Use input ellipticity and position angle parameters to compute semi-major axis radii using :class:`~mangadap.util.geometry.SemiMajorAxisCoo` (SPX_ELLCOO in MAPS file)
• Determine the fraction of unmasked wavelength channels for each spaxel
• If config specifies covariance calculation, compute the covariance using the LOGRSS file at:
  • the center of the wavelength range if wavelength limits specified or,
  • the broad-band weighted center of the response function
• Compute the (band-weighted) mean signal in each spaxel (SPX_MFLUX in MAPS file), (band-weighted) mean variance in each spaxel (SPX_MFLUX_IVAR in MAPS file), and the (band-weighted) mean S/N in each spaxel (SPX_SNR in MAPS file), using :func:`~mangadap.datacube.datacube.DataCube.flux_stats`.