نظام القياس الضوئي UBV (Arabic Wikipedia)

Analysis of information sources in references of the Wikipedia article "نظام القياس الضوئي UBV" in Arabic language version.

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archive.org

Hearnshaw، J. B. (1996). The Measurement of Starlight: Two Centuries of Astronomical Photometry. مطبعة جامعة كامبريدج. ص. 421. ISBN:9780521403931. مؤرشف من الأصل في 2019-12-15. In the 1950–51 winter, Johnson had commenced photometry in three passbands (designated U, V, and Y) on the McDonald 13- and 82-inch reflectors [54].

doi.org

Johnson، H. L.؛ Morgan، W. W. (1953). "Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas". The Astrophysical Journal. ج. 117 ع. 3: 313–352. Bibcode:1953ApJ...117..313J. DOI:10.1086/145697. مؤرشف من الأصل في 2019-04-02.

harvard.edu

ui.adsabs.harvard.edu

Johnson، H. L.؛ Morgan، W. W. (1953). "Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas". The Astrophysical Journal. ج. 117 ع. 3: 313–352. Bibcode:1953ApJ...117..313J. DOI:10.1086/145697. مؤرشف من الأصل في 2019-04-02.

web.archive.org

Johnson، H. L.؛ Morgan، W. W. (1953). "Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas". The Astrophysical Journal. ج. 117 ع. 3: 313–352. Bibcode:1953ApJ...117..313J. DOI:10.1086/145697. مؤرشف من الأصل في 2019-04-02.
Hearnshaw، J. B. (1996). The Measurement of Starlight: Two Centuries of Astronomical Photometry. مطبعة جامعة كامبريدج. ص. 421. ISBN:9780521403931. مؤرشف من الأصل في 2019-12-15. In the 1950–51 winter, Johnson had commenced photometry in three passbands (designated U, V, and Y) on the McDonald 13- and 82-inch reflectors [54].