Table 1
Calibration sequence for X-shooter data.
| Section | Task description | Data type | OB mode | |||||||||
|
|
||||||||||||
| pre-processing reductions | ||||||||||||
| 3.1 | pick-up noise elimination in bias frames | all | all | |||||||||
| 3.2 | inter-order background and pick-up noise modeling in science | all | all | |||||||||
| frames | ||||||||||||
|
|
||||||||||||
| pipeline reductions | ||||||||||||
| 4.1 | bias subtraction | all | all | |||||||||
| 4.2 | cosmic-ray hits removal | all | all | |||||||||
| 4.3 | wavelength calibration and extraction (rectification) | all | all | |||||||||
|
|
||||||||||||
| post-processing reductions (on rectified spectra) | ||||||||||||
| 5.1 | error map rescaling | all | all | |||||||||
| 5.2 | illumination background and pick-up noise subtraction | all | all | |||||||||
| 5.3 | bad pixel interpolation | all | all | |||||||||
| 5.4 | flat fielding | all | all | |||||||||
| 5.5 | illumination correction | all | all | |||||||||
| 5.6 | nodding | point source | NOD | |||||||||
| 5.7 | sky subtraction | point source | STARE | |||||||||
| 5.8 | optimal extraction | point source | all | |||||||||
| 5.9 | absolute flux calibration and order merging | all | all | |||||||||
| 5.10 | fine-tuning of the wavelength calibration | all | all | |||||||||
Notes. Column 1 shows the sections under which the various calibration steps (Col. 2) are described in this paper. The data types (point source, all) for which the recipes are applicable are given in the Col. 3. Column 4 contains information about the OB modes (STARE, NOD, OFFSET, all) that can be handled by the recipes.
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