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Attribute nameAttribute typeDocstringUnit
combinestrType of combination to use. Note that in most cases, science exposures cannot easily be combined on the CCD level, so this should usually be kept as "none"! This does not pay attention about the type of input data, and will combine all raw inputs! {none,average,median,minmax,sigclip}
crstrType of cosmic ray cleaning to use (for quick-look data processing). {none,dcr}
cropintAutomatically crop the output pixel tables in wavelength depending on the expected useful wavelength range of the active instrument mode (4750-9350 Angstrom for nominal mode and NFM, 4700-9350 Angstrom for nominal AO mode, and 4600-9350 Angstrom for the extended modes).
dlambdafloatWavelength step (in Angstrom per pixel) to use for resampling.
hsigmafloatHigh sigma for pixel rejection with sigclip
lsigmafloatLow sigma for pixel rejection with sigclip
mergeintMerge output products from different IFUs into a common file.
nhighintNumber of maximum pixels to reject with minmax
nifuintIFU to handle. If set to 0, all IFUs are processed serially. If set to -1, all IFUs are processed in parallel.
nkeepintNumber of pixels to keep with minmax
nlowintNumber of minimum pixels to reject with minmax
object_idoidtypeThe object identifier

The object identifier is an attribute shared by all persistent
instances. It is the prime key, by which object identity is established
overscanstrIf this is "none", stop when detecting discrepant overscan levels (see ovscsigma), for "offset" it assumes that the mean overscan level represents the real offset in the bias levels of the exposures involved, and adjusts the data accordingly; for "vpoly", a polynomial is fit to the vertical overscan and subtracted from the whole quadrant.
ovscignoreintThe number of pixels of the overscan adjacent to the data section of the CCD that are ignored when computing statistics or fits.
ovscrejectstrThis influences how values are rejected when computing overscan statistics. Either no rejection at all ("none"), rejection using the DCR algorithm ("dcr"), or rejection using an iterative constant fit ("fit").
ovscsigmafloatIf the deviation of mean overscan levels between a raw input image and the reference image is higher than |ovscsigma x stdev|, stop the processing. If overscan="vpoly", this is used as sigma rejection level for the iterative polynomial fit (the level comparison is then done afterwards with |100 x stdev| to guard against incompatible settings). Has no effect for overscan="offset".
passesintMaximum number of cleaning passes. Only used if cr=dcr.
recipe_versionintVersion of the recipe
resampleintResample the input science data into 2D spectral images using all supplied calibrations for a visual check. Note that the image produced will show small wiggles even when the input calibrations are good and were applied successfully!
saveimageintSave the pre-processed CCD-based image of each input exposure before it is transformed into a pixel table.
scaleintScale the individual images to a common exposure time before combining them.
skybinsizefloatSize of the bins (in Angstrom per pixel) for the intermediate spectrum to do the Gaussian fit to each sky emission line.
skyhalfwidthfloatHalf-width of the extraction box (in Angstrom) around each sky emission line.
skylinesstrList of wavelengths of sky emission lines (in Angstrom) to use as reference for wavelength offset correction using a Gaussian fit. It can contain multiple (isolated) lines, as comma-separated list, individual shifts are then combined into one weighted average offset. Set to "none" to deactivate.
skyrejectstrSigma clipping parameters for the intermediate spectrum to do the Gaussian fit to each sky emission line. Up to three comma-separated numbers can be given, which are interpreted as high sigma-clipping limit (float), low limit (float), and number of iterations (integer), respectively.
thresfloatThreshold for detection gap in factors of standard deviation. Only used if cr=dcr.
xboxintSearch box size in x. Only used if cr=dcr.
yboxintSearch box size in y. Only used if cr=dcr.

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