| combine | str | Type 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} | |
| cr | str | Type of cosmic ray cleaning to use (for quick-look data processing). {none,dcr} | |
| crop | int | Automatically 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). | |
| dlambda | float | Wavelength step (in Angstrom per pixel) to use for resampling. | |
| hsigma | float | High sigma for pixel rejection with sigclip | |
| lsigma | float | Low sigma for pixel rejection with sigclip | |
| merge | int | Merge output products from different IFUs into a common file. | |
| nhigh | int | Number of maximum pixels to reject with minmax | |
| nifu | int | IFU to handle. If set to 0, all IFUs are processed serially. If set to -1, all IFUs are processed in parallel. | |
| nkeep | int | Number of pixels to keep with minmax | |
| nlow | int | Number of minimum pixels to reject with minmax | |
| overscan | str | If 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. | |
| ovscignore | int | The number of pixels of the overscan adjacent to the data section of the CCD that are ignored when computing statistics or fits. | |
| ovscreject | str | This 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"). | |
| ovscsigma | float | If 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". | |
| passes | int | Maximum number of cleaning passes. Only used if cr=dcr. | |
| recipe_version | int | Version of the recipe | |
| resample | int | Resample 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! | |
| saveimage | int | Save the pre-processed CCD-based image of each input exposure before it is transformed into a pixel table. | |
| scale | int | Scale the individual images to a common exposure time before combining them. | |
| skybinsize | float | Size of the bins (in Angstrom per pixel) for the intermediate spectrum to do the Gaussian fit to each sky emission line. | |
| skyhalfwidth | float | Half-width of the extraction box (in Angstrom) around each sky emission line. | |
| skylines | str | List 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. | |
| skyreject | str | Sigma 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. | |
| thres | float | Threshold for detection gap in factors of standard deviation. Only used if cr=dcr. | |
| xbox | int | Search box size in x. Only used if cr=dcr. | |
| ybox | int | Search box size in y. Only used if cr=dcr. | |
