This article was accepted into the corpus but its outbound wikilinks were never NER-processed — typical at the deepest BFS hop or when the run's entity cap was reached. No expansion funnel to show.
| PGC (Principal Galaxies Catalogue) | |
|---|---|
| Name | Principal Galaxies Catalogue |
| Abbreviation | PGC |
| Author | Lyon Observatory; Harvard University contributors |
| Published | 1989 |
| Entries | 73,197 (primary) |
| Subject | Galaxies |
| Language | English |
PGC (Principal Galaxies Catalogue) The Principal Galaxies Catalogue is an astronomical catalogue compiling positions, magnitudes, diameters and morphological types for tens of thousands of extragalactic objects. It was produced by observatory teams to support surveys conducted with telescopes and instruments associated with institutions such as European Southern Observatory, Palomar Observatory, Arecibo Observatory and Kitt Peak National Observatory. The catalogue has been widely cited in work connected to projects by NASA, European Space Agency, Harvard College Observatory and research collected at Lyon Observatory.
The compilation effort began in the context of large photographic and radio surveys influenced by the work of Edwin Hubble, Fritz Zwicky, Harlow Shapley and initiatives like the Palomar Observatory Sky Survey and the Sloan Digital Sky Survey. Teams at Lyon Observatory collaborated with staff from Harvard University, Smithsonian Astrophysical Observatory and other institutions to homogenize data from catalogues such as the New General Catalogue, the Index Catalogue, the Third Reference Catalogue of Bright Galaxies and radio catalogues from Cambridge Observatory. The resulting 1989 publication synthesized measurements from observatories including Mount Wilson Observatory, Roque de los Muchachos Observatory and facilities used by missions like IRAS and ROSAT.
Entries in the catalogue provide equatorial coordinates (epoch 1950.0 and 2000.0 epochs used by International Astronomical Union conventions), apparent blue magnitudes, major and minor diameters, position angles and morphological classifications referencing the schemes of Edwin Hubble and Gérard de Vaucouleurs. The format cross-references earlier identifiers such as those from the New General Catalogue (NGC), the Index Catalogue (IC), and specialized lists produced by research groups at Max Planck Institute for Astronomy and the Royal Observatory, Edinburgh. Bibliographic attributions point to observations made with instruments on projects related to Hubble Space Telescope, Very Large Telescope, Subaru Telescope and surveys by Two Micron All Sky Survey teams.
Each catalogue object is assigned a unique numeric identifier used in cross-referencing with datasets maintained by SIMBAD Astronomical Database, NASA/IPAC Extragalactic Database, VizieR and archival services at Centre de Données astronomiques de Strasbourg. Cross-links often map PGC numbers to names found in the New General Catalogue, Catalogue of Galaxies and of Clusters of Galaxies (Zwicky) and radio listings from the Cambridge Catalogues. This enables correlation with data from missions and facilities such as Chandra X-ray Observatory, Spitzer Space Telescope, GALEX and ground-based arrays including the Very Large Array and ALMA.
The catalogue includes well-known systems that have been the focus of studies by astronomers like Vera Rubin, Sandra Faber, Rogelio Bernal Andreo and institutions such as California Institute of Technology and Institute for Advanced Study. Objects cross-identified in the catalogue include classic targets like those listed in the Messier catalogue, active nuclei studied following programs at Max Planck Institute for Astrophysics, and interacting systems observed in surveys by Royal Observatory Greenwich and teams linked to Mount Stromlo Observatory. Discoveries enabled by PGC cross-referencing contributed to research on dark matter exemplified by work related to Coma Cluster, galaxy evolution studies tied to Virgo Cluster, and surveys that informed instruments on James Clerk Maxwell Telescope.
Astronomers access PGC data through services operated by CDS Strasbourg, NASA, and university archives at Harvard-Smithsonian Center for Astrophysics, often combining entries with photometric and spectroscopic datasets from Sloan Digital Sky Survey, 2dF Galaxy Redshift Survey and catalogs produced by European Southern Observatory. The identifiers facilitate query joins with redshift catalogues, multiwavelength surveys from WISE, GAIA astrometric data releases coordinated by European Space Agency and targeted observational programs at facilities like Keck Observatory and Gemini Observatory.
The original catalogue reflects the observational limits and classification practices of the late 20th century, and subsequent work by groups at Centre de Données astronomiques de Strasbourg, NASA/IPAC, and instrument teams on Hubble Space Telescope and Sloan Digital Sky Survey have produced more precise positions, redshifts and morphological reclassifications. Limitations noted by researchers at University of Cambridge, Princeton University, University of California, Berkeley and Massachusetts Institute of Technology include incompleteness at faint magnitudes, heterogeneous photometric systems and occasional misidentifications resolved by follow-up campaigns with Keck Observatory, Subaru Telescope and radio arrays such as European VLBI Network.
Category:Astronomical catalogues