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3 | Quality plots
Same region in:
SpT = K:
HD_143107 (K2IIIab, Z=-0.05)
Other SpT:
O B A F G || M Unknown Telluric
3| Quality Plot for setting REDU_860 [PS] go to: 1 Overview | 2 Detailed spectra
BLU_346 | BLU_437 | REDL_580 | REDU_580 | REDL_860 | REDU_860
Find here a quality plot for the co-added products.

We display the full spectral region for a setup. The data are rebinned to 5 A bins and are intended as overview of the spectral slope, and as indication about the S/N quality of the co-added data.

The overview plot has
- the full co-added spectrum (rebinned to 5 A) on top ('overview');
- a signal/noise plot for the co-added spectrum. It comes in two versions: blue is the S/N as calculated from the spectrum and its (pipeline-delivered) errorbar file (panels 1 and 2). Red dots mark a measurement of S/N over 0.5A bins in which the statistical rms is evaluated. In many cases stellar absorption lines or telluric lines dominate the fluctuations and hence corrupt the S/N value. But in favourable cases a spectral region will show pure continuum and give a realistic estimate of S/N. Hence the upper envelope of the red dots can be seen as a S/N measurement of the final product spectrum, including all noise sources.