X-ray reverberation shows that the corona is compact, within 10 gravitationalradii of the central black hole, and irradiates a disc that extends down to ornear the ISCO. However, these results appear in tension with recent Swift discreverberation results, where the time delay between X-rays and UV/optical ismuch larger than expected from the standard reprocessing model in which acompact corona irradiates and thermalizes a thin accretion disc. In order toexplain these disc reverberation results, two suggestions have been made\:either (1) the thin disc is truncated with a hot inner flow or (2) absorptionand scattering from the broad line region affect the time lag measurements.Neither of these two scenarios can be properly tested with Swift alone. XMM-Newton is required.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2021-06-14T06:03:03Z/2021-06-23T07:32:46Z
Version
19.16_20210326_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Dr Erin Kara, 2022, 'Simultaneous Disc and Corona Reverberation Mapping in AGN Mrk 335', 19.16_20210326_1200, European Space Agency, https://doi.org/10.57780/esa-0s00dhu
