List of workflow tasks

This is the list of all the tasks and associated recipes in the SPHERE-IFS workflow. Only some of them are needed for scientific reduction, they are indicated by the flag “yes” (triggered by default) or “optional” (triggered only if requested by a workflow parameter). Other tasks are not used for scientific reduction (they are indicated by the flag “no”), they are mainly used for instrument monitoring and they can be executed only by specifying them as target. Note that, when a task is specified as target, all the tasks that generate the calibrations needed for it are automatically executed.

TASK	RECIPE	Used in science reduction	Notes
ifs_coronagraph_center	sph_ifs_science_dr	optional	Reduces center frames to determine stellar position behind coronagraph.
ifs_dark	sph_ifs_master_dark	yes	Creates master dark (IFS_MASTER_DARK) and bad-pixel map.
ifs_det_flat_broad_band	sph_ifs_master_detector_flat	yes	Generates broadband detector flat used for small-scale pixel-to-pixel correction.
ifs_det_flat_narrow_band1	sph_ifs_master_detector_flat	yes	Produces narrow-band detector flat component.
ifs_det_flat_narrow_band2	sph_ifs_master_detector_flat	yes	Produces narrow-band detector flat component.
ifs_det_flat_narrow_band3	sph_ifs_master_detector_flat	yes	Produces narrow-band detector flat component.
ifs_det_flat_narrow_band4	sph_ifs_master_detector_flat	yes	Produces narrow-band detector flat component.
ifs_distortion_map	sph_ifs_distortion_map	no	Measures geometric distortion via point-pattern comparison; outputs distortion map and optional residual map.
ifs_ifu_flat	sph_ifs_instrument_flat	yes	Produces total instrument flat and/or IFU (lenslet) flat.
ifs_instrument_background	sph_ifs_cal_background	yes	Measures instrumental background in counts/s per pixel.
ifs_science	sph_ifs_science_dr	yes	Main science reduction task; applies flats, background/dark subtraction, optional ADI and spectral deconvolution.
ifs_science_flux	sph_ifs_science_dr	optional	Processes FLUX frames (star offset from coronagraph) to measure stellar flux.
ifs_sky_background	sph_ifs_cal_background	yes	Processes sky background frames for background calibration.
ifs_spectra_positions	sph_ifs_spectra_positions	yes	Associates pixels with lenslets and assigns initial wavelength solution; produces Pixel Description Table (PDT).
ifs_standard_astrometry	sph_ifs_science_dr	optional	Reduces astrometric standard observations (currently treated as science data).
ifs_standard_flux	sph_ifs_science_dr	optional	Reduces flux standard observations (currently treated as science data).
ifs_static_bad_pixel_map	sph_ifs_master_dark	optional	Produces static bad-pixel map (IFS_STATIC_BADPIXELMAP) from master dark.
ifs_wavelength_calibration	sph_ifs_wave_calib	yes	Refines pixel-to-wavelength solution using calibration lines; updates PDT and QC metrics.

Notes

• For IFS science and standard tasks, backgrounds are associated in the following priority order: sky background, then internal background, then master dark.

• The detector-flat tasks are split by calibration lamp / wavelength. ifs_det_flat_narrow_band4 is only relevant for the YJH setting.

• Distortion is associated as mandatory or optional depending on configuration, through the distortion_mandatory / distortion_optional conditions in the workflow.

• ifs_science_flux and ifs_coronagraph_center are also associated to ifs_science mainly for calselector support, not because their products are always required by the science recipe.