Table 6
Slit-dependent quality of the telluric absorption correction of NIR-arm X-Shooter spectra.
| Slit | N | FWHMa | Ioff | Ires | |||
| [′′] | [pixels] | ||||||
| Mean | σ | Mean | σ | Mean | σ | ||
|
|
|||||||
| 0.4 | 437 | 2.49 | 0.20 | + 0.008 | 0.059 | 0.239 | 0.069 |
| 0.6 | 711 | 3.07 | 0.31 | −0.002 | 0.020 | 0.199 | 0.047 |
| 0.9 | 1927 | 3.95 | 0.74 | −0.012 | 0.027 | 0.193 | 0.064 |
| 1.2 | 566 | 4.44 | 1.01 | −0.015 | 0.024 | 0.179 | 0.056 |
| 1.5 | 148 | 5.03 | 1.62 | −0.020 | 0.020 | 0.158 | 0.059 |
| 5.0 | 48 | 5.41 | 1.57 | −0.057 | 0.025 | 0.156 | 0.066 |
Notes.
Since the FWHM in pixels depends on the wavelength for a nearly constant spectral resolution, the FWHM is given for the centre of the full NIR-arm wavelength range, i.e. 1.74 μm (see also Sect. 4.1). For spectra taken with a K-blocking filter, which only extend up to 2.1 μm, the FWHM was corrected to be also representative of 1.74 μm.
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