Table 8.
XSL keywords dictionary (primary header).
| General topic | Step | Keyword (1) | Description | Default value |
|---|---|---|---|---|
| OBJECT | Machine-readable name of the star | |||
| HNAME | Human-readable name of the star | |||
| General information | XSL_ID | X-shooter Spectral Library unique identifier | ||
| XSL_NAME | Internal name for the science spectrum | |||
| PROVi | Originating raw science file(s) | |||
| 1D extraction | EXT_AVG | Two 1D-spectra averaged | F | |
| Response curve | CAL_NAME | Internal name for the response curve used | ||
| CAL_STAR | Spectro-photometric standard star target | |||
| Data reduction | CAL_RAWi | Originating raw flux-standard file(s) | ||
| First flux calibration | FLUX_COR | First flux calibration applied | F | |
| Flux-loss correction | LOSS_COR | Correction for slit-losses applied | F | |
| STA_NAME | Internal name for the wide-slit spectrum used | |||
| STA_RAWi | Originating raw wide-slit file(s) | |||
| Rest-frame correction | REST_COR | Correction to rest-frame applied | F | |
| REST_VAL | cz value (2) [in km s−1] | |||
| Barycor values | BARY_COR | Barycentric radial velocity correction value | ||
| Quality flags | SNR | Median signal-to-noise ratio | ||
| WAVY_UVB | Wavy spectrum between 460 and 520 nm | F | ||
| (suspected residuals of the blaze function) | ||||
| Characterization and | WMIN_UVB | Shortest useful wavelength [in nm] | 300 | |
| quality assurance | HAIR_VIS | Some narrow spikes in the VIS spectrum | F | |
| NOIS_VIS | Noisy VIS spectrum | F | ||
| WAVY_VIS | Wavy in some part of the VIS spectrum | F | ||
| WMIN_VIS | Shortest useful wavelength [in nm] | 540 | ||
| HAIR_NIR | Some narrow spikes in the NIR spectrum | F | ||
| WAVY_NIR | Wavy in some part of the NIR spectrum | F | ||
Notes.
The values assigned to the keywords in the headers of the DR2 data files may depend on the arm (UVB, VIS or NIR), even when this is not explicit in the keyword name.
The cz values are barycentric. They are affected by uncertainties directly related to those on the standard wavelength calibration of the Xshooter data (cf. Sect. 4.3), as illustrated by differences between arms.
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