A dataset provided by the European Space Agency

Name 082461
Title X-ray-UV-optical reverberation of low accretion rate and low mass AGN NGC4395


DOI https://doi.org/10.5270/esa-48oh2u3
Author Prof Ian McHardy
Description We present a coordinated 3-themed program to investigate the apparently discrepant inner source geometry of the very low accretion rate (mdot) and very low mass AGN NGC4395 to determine how source structure depends on mdot. With EPIC X-rays we will, via X-ray reverberation, determine whether the X-ray size really is x10 larger than for higher mdot Seyferts, perhaps indicating a transition to jet dominated X-ray emission. With EPIC and OM fast readout we will measure lags between X-ray and UV and U-bands to determine whether, unlike in higher mdot AGN, the inner accretion disc does not obscure the outer accretion disc but allows direct X-ray illumination to produce UV-optical variations. Finally, from X-ray iron line spectra, we will measure the inner radius of the disc.
Publication No observations found associated with the current proposal
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 Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2020-01-14T23:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2020-01-14T23:00:00Z, 082461, 17.56_20190403_1200. https://doi.org/10.5270/esa-48oh2u3