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... > Observational astronomy > Astronomical techniques > Photometry > Photometric systems > Broad band photometry > AB photometry

Preferred term

AB photometry  

Definition

  • A photometric system defined by reference to monochromatic magnitudes in such a way that AB is equal to the V magnitude for a source with a flat spectral energy distribution. The zero point is defined by the flux of the star Vega at 5546 Å. In this system, an object with constant flux per unit frequency interval has zero color. (en)

Broader concept

Entry terms

  • AB magnitude (en)
  • AB magnitude system (en)
  • AB photometric system (en)

Contributor

Creator

Editorial note

URI

http://astrothesaurus.org/uat/2168

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RDF/XML TURTLE JSON-LD Created 10/21/20, last modified 10/26/20