Large-Amplitude X-ray Outbursts from Galactic Nuclei : A Systematic Survey Using ROSAT Archival Data

Abstract

In recent years, luminous X-ray outbursts with variability amplitudes as high as≈ 400 have been serendipitously detected from a small number of active and inactive galaxies. These outbursts may result from the tidal disruptions of stars by supermassive black holes as well as accretion-disk instabilities. In order to place the first reliable constraints on… (More)

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