We present a coordinated 3-themed program to investigate the apparentlydiscrepant inner source geometry of the very low accretion rate (mdot) and verylow mass AGN NGC4395 to determine how source structure depends on mdot. WithEPIC X-rays we will, via X-ray reverberation, determine whether the X-ray sizereally is x10 larger than for higher mdot Seyferts, perhaps indicating atransition to jet dominated X-ray emission. With EPIC and OM fast readout wewill measure lags between X-ray and UV and U-bands to determine whether, unlikein higher mdot AGN, the inner accretion disc does not obscure the outeraccretion disc but allows direct X-ray illumination to produce UV/opticalvariations. Finally, from X-ray iron line spectra, we will measure the inner radius of the disc.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2018-12-13T06:16:19Z/2019-01-03T13:16:44Z
Version
17.56_20190403_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, Prof Ian McHardy, 2020, 'X-ray-UV-optical reverberation of low accretion rate and low mass AGN NGC4395', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-48oh2u3
