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.
| Principal Galaxy Catalogue | |
|---|---|
| Name | Principal Galaxy Catalogue |
| Type | Astronomical catalogue |
| Date | 1989 |
| Creator | P. Paturel et al. |
| Entries | 73,197 |
| Language | English, French |
Principal Galaxy Catalogue
The Principal Galaxy Catalogue is a compiled astronomical catalogue presenting positions, magnitudes, morphological types, redshifts, and ancillary data for tens of thousands of galaxies assembled for use by observational astronomers and survey teams. It serves as a cross-reference resource linking legacy lists and modern surveys, supporting projects associated with the European Southern Observatory, Space Telescope Science Institute, Sloan Digital Sky Survey, Two Micron All Sky Survey, and other observatories and institutions. The catalogue has been cited in work connected to instruments such as the Hubble Space Telescope, Very Large Telescope, Arecibo Observatory, and missions including Voyager program research contexts.
The Principal Galaxy Catalogue was published to consolidate entries from foundational resources like the New General Catalogue, Index Catalogue, Uppsala General Catalogue, and regional lists produced by observatories such as the Observatoire de Paris and Harvard College Observatory. Designed for interoperability with datasets from projects including Infrared Astronomical Satellite, ROSAT, Gaia (spacecraft), Chandra X-ray Observatory, and XMM-Newton, it provides standardized identifiers useful to research groups at institutions such as Max Planck Society, National Aeronautics and Space Administration, European Space Agency, and university departments at Cambridge University, Princeton University, Massachusetts Institute of Technology, and California Institute of Technology.
Compilation drew on plate-based catalogues and digitized surveys produced by teams at the Royal Greenwich Observatory, Palomar Observatory, and the Mount Wilson Observatory. The data fields include equatorial coordinates (J2000), apparent blue magnitudes, morphological classifications using conventions traceable to work by Edwin Hubble and Gerard de Vaucouleurs, radial velocities measured in km/s often derived from spectroscopic campaigns linked to instruments like the Keck Observatory and the Subaru Telescope, and cross-identifications with identifiers from the Two-degree Field Galaxy Redshift Survey, 6dF Galaxy Survey, and the Zwicky Catalog. The catalogue also records group and cluster memberships relevant to systems such as the Virgo Cluster, Coma Cluster, Fornax Cluster, and structure studies connected to the Great Attractor and the Local Group.
Work on the catalogue was led by astronomers associated with institutions including the Paris Observatory, Centre National de la Recherche Scientifique, and collaborations spanning the Royal Astronomical Society and national academies. The project built on legacy efforts such as the Shapley-Ames Catalogue and the Catalogue of Galaxies and of Clusters of Galaxies (Zwicky), while interacting with surveys from the Palomar Observatory Sky Survey and radio catalogues like those from the NRAO. Contributors referenced classification schemes influenced by Harlow Shapley, Allan Sandage, and Gérard de Vaucouleurs and coordinated with data centers such as the Centre de Données astronomiques de Strasbourg and the National Optical Astronomy Observatory for distribution.
The original printed and electronic releases were succeeded by machine-readable updates coordinated with curators at the Centre de Données astronomiques de Strasbourg and mirrored in institutional archives at NASA/IPAC, European Southern Observatory Science Archive Facility, and university repositories at University of Cambridge and Harvard University. Subsequent cross-matching efforts linked PGC entries with catalogues from the Sloan Digital Sky Survey (SDSS) DRx series, the Galaxy And Mass Assembly project, infrared identifications from WISE (spacecraft), and neutral hydrogen detections from surveys like ALFALFA. Data exchange protocols adhered to standards promoted by organizations such as the International Astronomical Union and the International Virtual Observatory Alliance.
Researchers in extragalactic astronomy and cosmology use the catalogue for target selection in spectroscopic programs at telescopes like Gemini Observatory, Submillimeter Array, and Atacama Large Millimeter Array; for statistical studies of luminosity functions following methodologies linked to Schechter function analyses; and for environmental studies referencing clusters catalogued by Abell and groups identified by the Tully cataloguing work. The catalogue underpins archival investigations involving archival missions such as IRAS, Spitzer Space Telescope, GALEX, and survey science teams at University of California, Berkeley, Johns Hopkins University, and University of Chicago.
Critiques focus on incompleteness at faint magnitudes relative to deep surveys like the Hubble Deep Field and biases arising from heterogeneous source material including photographic plate scans from the Palomar Observatory Sky Survey and earlier compilations by Fritz Zwicky. Users note discrepancies in morphological classifications when compared to contemporary citizen-science reclassifications from projects like Galaxy Zoo hosted at Oxford University and algorithmic morphological catalogs from machine-learning efforts at Google research collaborations. Redshift coverage is uneven compared to dedicated redshift surveys such as 2dFGRS and SDSS.
Machine-readable versions were distributed on magnetic media and later via electronic services maintained by the Centre de Données astronomiques de Strasbourg, SIMBAD Astronomical Database, and the NASA/IPAC Extragalactic Database. Data consumers integrate entries into virtual observatory tools in formats compatible with FITS tables, VOTable standards promoted by the International Virtual Observatory Alliance, and relational databases hosted at centers like HEASARC and institutional archives at European Space Agency and National Science Foundation-funded facilities.
Category:Astronomical catalogues