DAP LOGCUBE File Construction

Analysis class: construct_cube_file

File Root: $MANGA_SPECTRO_ANALYSIS/$MANGADRP_VER/$MANGADAP_VER/[PLATE]/[IFUDESIGN]

File Template: manga-[PLATE]-[IFUDESIGN]-LOGCUBE-[DAPTYPE].fits.gz

Important class dependencies:

• Main full-spectrum modeling classes:

  • SpatiallyBinnedSpectra

  • StellarContinuumModel

  • EmissionLineModel

• DAPFitsUtil: Contains many convenience methods that, e.g., reconstruct a set of maps or datacubes based on input data sorted by bin ID and a map with the location of each bin ID.

Algorithm:

• Check the input types

• Construct the 3D cubes for the binned spectra using mangadap.proc.spatiallybinnedspectra.SpatiallyBinnedSpectra.construct_3d_hdu(), for the stellar continuum models using mangadap.proc.stellarcontinuummodel.StellarContinuumModel.construct_3d_hdu(), and for the emission-line models using mangadap.proc.emissionlinemodel.EmissionLineModel.construct_3d_hdu() and the provided objects.

• Initialize the primary header by copying over the DRP header and adding the DAP version information.

• Construct the FLUX, IVAR, MASK, LSF, WAVE, and REDCORR extensions using the 3D binned spectra cube and binned_data_cube(). The reddening vector is used to remove the reddening correction, such that the returned spectra match the observed flux in the DRP files.

• Construct the MODEL, MODEL_MASK, EMLINE, STELLAR, and STELLAR_MASK extensions using the model data and model_cubes().

• Combine the BINID extensions from the SpatiallyBinnedSpectra, StellarContinuumModel, and EmissionLineModel objects and combine_binid_extensions(). This does not include the emission-line moment and spectral-index bin IDs; those channels in the BINID extension are blank unlike the MAPS file.

• Finalize the DAP primary header, which primarily constructs the MANGA_DAPQUAL bit using finalize_dap_primary_header().