X-ray observations of NGC 1365: time-resolved eclipse of the X-ray source

2007/01/04 by G. Risaliti, Risaliti, G. · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0701108

Four pages, two figures. Conference proceedings to appear in "The Central Engine of Active Galactic Nuclei", ed. L. C. Ho and J.-M. Wang (San Francisco: ASP)

arxiv created 2007/01/04 · openalex publication_date 2007/01/04 · arxiv updated 2009/12/01 · openalex created_date 2021/01/05 · openalex updated_date 2026/07/28

Abstract

We present an extraordinary variation of the X-ray spectrum of the obscured AGN in NGC 1365, which was observed by Chandra to change from Compton-thin to Compton-thick and back to Compton-thin in four days. This fast variation imply a a size of ~10¹4 cm for the emitting region, and an extremely compact size (~10¹6 cm) of the clumpy circumnuclear absorber.

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