| Proposal ID | 082461 |
| Title | X-ray-UV-optical reverberation of low accretion rate and low mass AGN NGC4395 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0824610101 |
| DOI | https://doi.org/10.5270/esa-48oh2u3 |
| Principal Investigator, PI | Prof Ian McHardy |
| Abstract | 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. |
| Publications |
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| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2020-01-14T23:00:00Z |
| Keywords | "NGC4395", "mdot agn", "mdot seyferts", "source structure", "inner accretion disc", "themed program", "epic xray", "x10 larger", "xray size", "optical variations", "EPIC", "outer accretion disc", "om fast readout", "inner radius", "via xray reverberation", "low accretion rate", "xray illumination" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | 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 |