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Caltech Authors (California Institute of Technology)
Article . 1982
Data sources: Bielefeld Academic Search Engine (BASE)
Science
Article . 1982 . Peer-reviewed
Data sources: Crossref
Science
Article . 1982 . Peer-reviewed
Data sources: Crossref
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Article . 2010
Data sources: Europe PubMed Central
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Quasar Boundary

descriptionPublicationkeyboard_double_arrow_right Article 02 Apr 1982 English Publisher:American Association for the Advancement of Science (AAAS)Journal:Science, volume 216, pages 6-6 (issn: 0036-8075, eissn: 1095-9203, Copyright policy )
Authors: Schmidt, Maarten;

doi: 10.1126/science.216.4541.6.b , 10.1126/science.216.4541.6-b

pmid: 17809773

Quasar Boundary

Abstract

The observed absence of quasar redshifts larger than 3.53 is erroneously attributed to Richard Green and myself in "A boundary for the quasars" (Research News, 22 Jan., p. 388). Our survey of bright quasars does not cover redshifts larger than 2.2 because in choosing candidates we rely on the ultraviolet excess, which tends to disappear at larger redshifts. ; © 1982 American Association for the Advancement of Science.

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    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 4
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    		 Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    		 Average
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
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