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Ginga observations of Seyfert galaxies (1993)

Awaki, H. ; Koyama, K.

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Publication Date: 2019-07-13

Description: We observed twenty-eight Seyfert 2 galaxies with the Japanese X-ray satellite, Ginga, and found Seyfert 2 galaxies, in general, have the X-ray spectral characteristics of obscured Seyfert 1 nuclei. This results agrees with the predictions from the Unified Seyfert model proposed by Antonucci and Miller. However, among the observed Seyfert 2 galaxies, there are a few galaxies with no evidence of an obscuration, contrary to the general predictions of the unified model. We note that type 2 active galactic nuclei (AGN) will contribute to the Cosmic Diffuse X-ray Background, if the unified Seyfert model can be extended to the far distant AGN such as quasars.

Keywords: ASTRONOMY

Type: Advances in Space Research (ISSN 0273-1177); 13; 12; p. (12)221-(12)230

Format: text

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