diff --git a/spectroscopy/code_src/plot_functions.py b/spectroscopy/code_src/plot_functions.py
index 972fa5bb..58f88e71 100644
--- a/spectroscopy/code_src/plot_functions.py
+++ b/spectroscopy/code_src/plot_functions.py
@@ -117,7 +117,7 @@ def create_figures(df_spec, bin_factor, show_nbr_figures , save_output):
 
         ## Logarithmic or linear x-axis?
         all_instruments = [ list(singleobj_df.groupby('instrument'))[ii][0] for ii in range(len(list(singleobj_df.groupby('instrument')))) ]
-        if "IRS" in all_instruments:
+        if ("IRS" in all_instruments) | ("PACS" in all_instruments) | ("SPIRE" in all_instruments):
             LOGX = True
         else:
             LOGX = False
diff --git a/spectroscopy/spectra_generator.md b/spectroscopy/spectra_generator.md
index 797ee3dc..ae5b1586 100644
--- a/spectroscopy/spectra_generator.md
+++ b/spectroscopy/spectra_generator.md
@@ -241,7 +241,6 @@ df_spec.append(df_spec_HST)
 ### 2.3 ESA Archive
 ```python
 # Herschel PACS & SPIRE from ESA TAP using astroquery
-
 herschel_radius = 1.1  
 herschel_download_directory = 'data/herschel'
 if not os.path.exists(herschel_download_directory):