Occultation Measurement of the Size of the X-Ray-emitting Region in the Active Galactic Nucleus of NGC 1365
作者： G. Risaliti , G. Risaliti , A. Zezas , M. Salvati , A. Baldi
DOI: 10.1086/517884
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摘要: We present an occultation of the central X-ray-emitting region in Seyfert galaxy NGC 1365. This extreme spectral variation (from Compton-thin to reflection-dominated and back 4 days) has been caught a 10 day Chandra monitoring campaign consisting six short (15 ks) observations performed every 2 days. discuss implications this within scenario Compton-thick cloud crossing line sight X-ray source. estimate source size R ≤ 1014 cm distance from D 1016 cm. direct measurement confirms theoretical expectations extremely compact shows that circumnuclear gas is located at center on scale broad-line region.
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