Astrophysics (Index)About

Catalog of Galaxies and Clusters of Galaxies

(CGCG, ZC, Zwicky Catalog)
(list of galaxies/clusters assembled in 1960s)

The Catalog of Galaxies and Clusters of Galaxies (aka Zwicky Catalog, and abbreviated CGCG or sometimes ZC) is a list (in eight volumes, I to VIII) published by Fritz Zwicky beginning in 1961, that totals more than 29000 galaxies and 9000 galaxy clusters identified in the Palomar Observatory Sky Survey (POSS) plates. (The designators used for the catalog's galaxies were atypical: they began with the volume number, e.g., "II Zw example II Zw 96" for the 96th galaxy in volume II: these are now often reversed, i.e., "Zw II 96", or "CGCG" is used with coordinates.) Since publication, the catalog has been updated with corrections and it remains in use for research, such as selecting samples for study. The Updated Zwicky Catalog (UZC) is a 1990s update, using newer observations to correct data and add precision.

The Catalogue of Selected Compact Galaxies and of Post-eruptive Galaxies (CGPG) is Zwicky's 1971 list of compact galaxies (smaller than typically-observed galaxies), and post-eruptive galaxies (Zwicky's term for galaxies with atypical spectral energy distributions and/or morphology, which perhaps included what is now known to be characteristics of active galactic nuclei, AGNs, but I can't tell). Zwicky selected many of these from his CGCG, cross-referencing them with the CGCG designators, which are often used to refer to this catalog's entries.


(catalog,galaxies,galaxy clusters)
Further reading:
https://en.wikipedia.org/wiki/Catalogue_of_Galaxies_and_Clusters_of_Galaxies
https://ui.adsabs.harvard.edu/abs/1996yCat.7190....0Z/abstract
https://ui.adsabs.harvard.edu/abs/1999PASP..111..438F/abstract
ftp://cdsarc.u-strasbg.fr/cats/VII/190/ReadMe
https://www.daviddarling.info/encyclopedia/Z/Zwicky.html
https://ui.adsabs.harvard.edu/abs/1971cscg.book.....Z/abstract
PrefixExample  
CGCGCGCG 448-020 
CGPGCGPG 0930.5+5527compact galaxies
I ZwI Zw 18or "1Zw" or 1Z", Volume I
II ZwII Zw 96or "2Zw" or "2Z", Volume II
III ZwIII Zw 2or "3Zw" or "3Z", Volume III
IV ZwIV Zw 29or "4Zw" or "4Z", Volume IV
V ZwV Zw 311or "5Zw" or "5Z", Volume V
VI ZwVI Zw 116or "6Zw" or "6Z", Volume VI
VII ZwVII Zw 466or "7Zw" or "7Z", Volume VII
VIII ZwVIII Zw 388or "8Zw" or "8Z",Volume VIII
ZZ 137-068 
ZwZw I 18or cited as "I Zw 18"
ZwClZwCl 0024+17cluster

Referenced by pages:
AT2018cow
UZC-SSRS2 Group Catalog (USGC)
Zwicky 3146 (Zw 3146)

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