(Q68625395)

English

Extreme spectral variations of the Seyfert galaxy Markarian 993

scientific article published in January 1992

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scholarly article

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Extreme spectral variations of the Seyfert galaxy Markarian 993 (English)

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author name string

Tran H. D.

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Osterbrock D. E.

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Martel A.

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publication date

1992

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The Astronomical Journal

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104

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2072–2077

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Identifiers

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1992AJ....104.2072T

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