Spectral plots: add "ignored" next to the S/N ratio

If the spectrum is ignored because of a S/N ratio too low or impossible
to compute.

Author: claudiodsf

CHANGELOG.md

@@ -44,6 +44,8 @@ Copyright (c) 2011-2025 Claudio Satriano <satriano@ipgp.fr>
 - New plot: raw traces
 - Stacked spectra: color spectral curves according to the weighting function
 - Spectral plots: show information on the reason why a fit failed
+- Spectral plots: add "ignored" next to the S/N ratio if the spectrum is
+  ignored because of a S/N ratio too low or impossible to compute
 - `plot_sourcepars`: possibility of selecting the latest runid for each event
 - `plot_sourcepars`: new plot type: static stress drop vs. depth
 - `plot_sourcepars`: option to color data points in scatter plot by another

sourcespec/ssp_plot_spectra.py

@@ -460,6 +460,8 @@ def _snratio_text(spec, ax, color, path_effects):
     if spec.stats.spectral_snratio is None:
         return
     snratio_text = f'S/N: {spec.stats.spectral_snratio:.1f}'
+    if spec.stats.ignore:
+        snratio_text += ' (ignored)'
     ax.text(
         0.95, SNRATIO_TEXT_YPOS, snratio_text, ha='right', va='top',
         fontsize=8, color=color, path_effects=path_effects,