Rules of usage of VizieR data


The VizieR Information System provides a standardized description of astronomical catalogues, and generally a free access to the data contained therein, essentially dedicated to a scientific usage. The data retrieved with VizieR are free of usage in a scientific context; however, as it is the usage in scientific publication, the original authors and publication references including the publisher have to be explicitely cited (see section Code of conduct of scientific research).

An acknowledgment of the usage of VizieR, as described below, would be appreciated.

The commercial usage of the data is subject to rules depending of the origin (see section How to search Copyright information).

The Information system including the metadata is private and reserved to the CDS.

Code of conduct of scientific research

(From the ethics statement available in the AAS web page:

Proper acknowledgement of the work of others should always be given, and complete referencing is an essential part of any astronomical research publication. Authors have an obligation to their colleagues and the scientific community to include a set of references that communicates the precedents, sources, and context of the reported work. Deliberate omission of a pertinent author or reference is unacceptable. Data provided by others must be cited appropriately, even if obtained from a public database.

All authors are responsible for providing prompt corrections or retractions if errors are found in published works with the first author bearing primary responsibility.

Plagiarism is the presentation of others' words, ideas or scientific results as if they were one's own. Citations to others' work must be clear, complete, and correct. Plagiarism is unethical behavior and is never acceptable.

These statements apply not only to scholarly journals but to all forms of scientific communication including but not limited to press releases, proposals, websites, popular books, and podcasts.

How to search Copyright information

The copyrights of a catalogue depend on the data origin.

Please refer to the ReadMe file associated to the catalogue to verify if a "copyright" exists. Else, see the policy section of the journals.

The author and the publisher are available in the ReadMe file of the catalogue. Original articles are linked with the bibcode in the first section of the ReadMe file.

How to acknowledge

The usual rule is to cite the authors, the producer and the publisher of the catalogue; details can be found in the associated ReadMe file.

Note for the authors: you can add a section "Request for Acknowledgment" in the ReadMe file describing your catalogue (see

Concerning the VizieR Information System:
If the access to catalogues with VizieR was helpful for your research work, the following acknowledgment would be appreciated:

"This research has made use of the VizieR catalogue access tool, CDS,
 Strasbourg, France. The original description of the VizieR service was
 published in A&AS 143, 23"

A VizieR catalogue can be directly referred to as "VizieR Catalogue" followed by the VizieR unique identifying code, for example "VizieR Catalogue J/A+AS/124/75" or "VizieR Catalogue II/246".

Cutri R. M. et al, 2003, VizieR Catalog: II/246 . CDS, Strasbourg, France

Journal references for VizieR catalogues formatted for various Journals can be generated directly using the ADS interface.