diff --git a/ChangeLog b/ChangeLog
index 05e33b62c364a8e0bc4d8221c139f06aaa5a5535..c53803dfd8ccba1cd827ba4bfee1476148f05310 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2019-08-28 Richard Larsson <larsson@mps.mpg.de>
+
+	* ARTS-XML-DATA-2-3-31
+	
+	* spectroscopy/Perrin/:  Seeing that there has been
+	no move to implement reading of quantum numbers for
+	the catalog, and since ARTS by default now saves the
+	latest catalog format by default, the need to have
+	the catalog in ARTSCAT-5 format no longer exists so
+	I remove it.  The entire point of having it before no
+	longer exist
+
 2019-02-21 Richard Larsson <larsson@mps.mpg.de>
 
 	* ARTS-XML-DATA-2-3-30
diff --git a/spectroscopy/Perrin_artscat34/ARTSCAT-4_Col29_Conventions.txt b/spectroscopy/Perrin/ARTSCAT-4_Col29_Conventions.txt
similarity index 100%
rename from spectroscopy/Perrin_artscat34/ARTSCAT-4_Col29_Conventions.txt
rename to spectroscopy/Perrin/ARTSCAT-4_Col29_Conventions.txt
diff --git a/spectroscopy/Perrin/C2H2.xml.gz b/spectroscopy/Perrin/C2H2.xml.gz
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diff --git a/spectroscopy/Perrin/C3H8.xml.gz b/spectroscopy/Perrin/C3H8.xml.gz
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diff --git a/spectroscopy/Perrin/CH3Cl.xml.gz b/spectroscopy/Perrin/CH3Cl.xml.gz
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diff --git a/spectroscopy/Perrin/CH3OH.xml.gz b/spectroscopy/Perrin/CH3OH.xml.gz
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diff --git a/spectroscopy/Perrin/CH4.xml.gz b/spectroscopy/Perrin/CH4.xml.gz
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diff --git a/spectroscopy/Perrin_artscat34/ExtractFromHITRAN.arts b/spectroscopy/Perrin/ExtractFromHITRAN.arts
similarity index 100%
rename from spectroscopy/Perrin_artscat34/ExtractFromHITRAN.arts
rename to spectroscopy/Perrin/ExtractFromHITRAN.arts
diff --git a/spectroscopy/Perrin/H2.xml.gz b/spectroscopy/Perrin/H2.xml.gz
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diff --git a/spectroscopy/Perrin/PH3.xml.gz b/spectroscopy/Perrin/PH3.xml.gz
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diff --git a/spectroscopy/Perrin/README b/spectroscopy/Perrin/README
index 6a2304620af03aa6bfb6e2f14166b164bd4d6d83..43bb2439df85944021fa77eff978fa8fdf31163f 100644
--- a/spectroscopy/Perrin/README
+++ b/spectroscopy/Perrin/README
@@ -1,12 +1,10 @@
 This directory contains a spectroscopic line catalogue.
 
-NOTE: currently Hitran-source data is not up-to-date. (to be fixed by Oliver/Richard)
-
 - prepared as part of ESA ESA Planetary Toolbox study. For more information see
   the ESA study's Technical Note 3.
 - specifically prepared for planetary radiative transfer
 - covers data for frequencies <3THz
-- data is of unified ARTSCAT-5 format
+- data is of ARTSCAT-4 (source: Perrin) and ARTSCAT-3 (source: Hitran) format
 
 
 Species overview
diff --git a/spectroscopy/Perrin/SF6.xml.gz b/spectroscopy/Perrin/SF6.xml.gz
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diff --git a/spectroscopy/Perrin_artscat34/README b/spectroscopy/Perrin_artscat34/README
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index 43bb2439df85944021fa77eff978fa8fdf31163f..0000000000000000000000000000000000000000
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+++ /dev/null
@@ -1,179 +0,0 @@
-This directory contains a spectroscopic line catalogue.
-
-- prepared as part of ESA ESA Planetary Toolbox study. For more information see
-  the ESA study's Technical Note 3.
-- specifically prepared for planetary radiative transfer
-- covers data for frequencies <3THz
-- data is of ARTSCAT-4 (source: Perrin) and ARTSCAT-3 (source: Hitran) format
-
-
-Species overview
-================
-
-Species  #    Source
-C2H2    (26)  Hitran
-C2H4    (38)  Hitran  NOL* (701.202696)
-C2H6    (27)  Hitran  NOL* (706.601510)
-C3H8          Perrin  [NOH*]
-C4H2    (43)  Hitran
-CF4     (42)  Hitran  NOL* (594.580718)
-CH3Br   (40)  Hitran  NOL* (794.403140)
-CH3CN   (41)  Hitran  NOL* (890.051655)
-CH3Cl   (24)  Hitran
-CH3OH   (39)  Hitran
-CH4     (6)   Perrin
-CO      (5)   Perrin
-CO2     (2)   Perrin
-COF2    (29)  Hitran  NOL* (686.730618)
-CS      (46)  Hitran
-ClO     (18)  Hitran
-ClONO2  (35)  Hitran  NOL* (763.641040)
-H2      (45)  Hitran
-H2CO    (20)  Perrin
-H2O     (1)   Perrin
-H2O2    (25)  Perrin
-H2S     (31)  Perrin
-H2SO4         Perrin
-HBr     (16)  Hitran
-HCN     (23)  Hitran
-HC3N    (44)  Hitran
-HCOOH   (32)  Hitran
-HCl     (15)  Perrin
-HF      (14)  Perrin
-HI      (17)  Hitran
-HNO3    (12)  Hitran
-HO2     (33)  Perrin
-HOBr    (37)  Hitran
-HOCl    (21)  Hitran
-N2      (22)  Hitran
-N2O     (4)   Hitran
-NH3     (11)  Perrin
-NO      (8)   Hitran
-NO+     (36)  Hitran  NOL* (1634.831153)
-NO2     (10)  Hitran
-O       (34)  Hitran
-O2      (7)   Perrin
-O3      (3)   Perrin
-OCS     (19)  Perrin
-OH      (13)  Hitran
-PH3     (28)  Perrin
-SF6     (30)  Hitran  NOL* (580.000244)
-SO            Perrin
-SO2     (9)   Perrin
-SO3     (47)  Hitran
-
-NOL*:    No lines between 0-3THz (1st linepos in HITRAN [cm-1])
-NOH*:    No lines in HITRAN yet at all
-
-Perrin' spectroscopic line database
-==================================
-
-Latest version:
-
-Nov 23  2012 C3H8.xml.gz
-Mar 15  2012 CH4.xml.gz
-Mar 17  2014 CO.xml.gz
-Jan 29  2014 CO2.xml.gz
-Mar  1  2012 H2CO.xml.gz
-Jan 29  2014 H2O.xml.gz
-Mar 15  2012 H2O2.xml.gz
-Mar  1  2014 H2S.xml.gz
-Mar 15  2012 H2SO4.xml.gz
-Mar 17  2014 HCl.xml.gz
-Mar  1  2014 HF.xml.gz
-Aug 23  2012 HO2.xml.gz
-Mar 15  2012 NH3.xml.gz
-Feb  6  2014 O2.xml.gz
-Feb  6  2014 O3.xml.gz
-Mar  1  2014 OCS.xml.gz
-Mar 15  2012 PH3.xml.gz
-Apr  7  2014 SO.xml.gz
-Feb  6  2014 SO2.xml.gz
-
-
-Unit conversion values used:
-
-           ccc=29979.2458d+14
-           Joule=5.03411701D+22
-c          E"(ARTS)=E"(HITRAN)/Joule
-           HzPa=0.33798382D-05
-c          Gamma(ARTS)=Gamma(HITRAN)/HzPa
-           ZIarts=2.99792458D+6
-c          Int(ARTS)=Int(HITRAN)*ZIarts
-           sarts=2.99792458D+10
-c          sigm(ARTS)=sigm(HITRAN)*sarts
-
-
-
-Species from Hitran
-===================
-
-Latest version: 2012 edition
-
-2015-06-09 17:05 C2H2.xml.gz
-2015-06-09 17:06 C4H2.xml.gz
-2015-06-09 17:05 CH3Cl.xml.gz
-2013-01-11 09:07 CH3OH.xml.gz
-2015-06-09 17:05 ClO.xml.gz
-2015-06-09 17:06 CS.xml.gz
-2015-06-09 17:06 H2.xml.gz
-2015-06-09 17:05 HBr.xml.gz
-2015-06-09 17:06 HC3N.xml.gz
-2012-03-19 11:03 HCN.xml.gz
-2015-06-09 17:05 HCOOH.xml.gz
-2015-06-09 17:05 HI.xml.gz
-2015-06-09 17:05 HNO3.xml.gz
-2015-06-09 17:05 HOBr.xml.gz
-2015-06-09 17:05 HOCl.xml.gz
-2012-03-19 11:03 N2O.xml.gz
-2015-06-09 17:05 N2.xml.gz
-2015-06-09 17:05 NO2.xml.gz
-2015-06-09 17:05 NO.xml.gz
-2015-06-09 17:05 OH.xml.gz
-2012-03-19 11:03 O.xml.gz
-2015-06-09 17:06 SO3.xml.gz
-
-
-Empty files for species with no (THz) lines
-===========================================
-(but required as broadening species (*) or due to existence of Earth profile data)
-
-2012-03-19 11:03 C2H6.xml.gz
-2012-03-19 11:03 COF2.xml.gz
-2012-11-24 02:04 He.xml.gz
-2012-03-19 11:03 SF6.xml.gz
-
-
-Line Count
-==========
-
-- abs_lines_per_speciesCreateFromLines
-  0: N2O-*-*-*: 451 lines
-  1: NO-*-*-*: 5233 lines
-  2: NO2-*-*-*: 20170 lines
-  3: HNO3-*-*-*: 490086 lines
-  4: OH-*-*-*: 2111 lines
-  5: HBr-*-*-*: 326 lines
-  6: HI-*-*-*: 375 lines
-  7: ClO-*-*-*: 9453 lines
-  8: HOCl-*-*-*: 2952 lines
-  9: N2-*-*-*: 36 lines
-  10: HCN-*-*-*: 319 lines
-  11: CH3Cl-*-*-*: 12824 lines
-  12: C2H2-*-*-*: 40 lines
-  13: HCOOH-*-*-*: 6808 lines
-  14: O-*-*-*: 1 lines
-  15: HOBr-*-*-*: 1463 lines
-  16: CH3OH-*-*-*: 4663 lines
-  17: C4H2-*-*-*: 3744 lines
-  18: HC3N-*-*-*: 985 lines
-  19: H2-*-*-*: 34 lines
-  20: CS-*-*-*: 694 lines
-  21: SO3-*-*-*: 25 lines
-
-
-
-ARTS controlfile used to extract species from HITRAN data
-=========================================================
-see ExtractFromHITRAN.arts (run with -r 030 to create above line count)
-
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