| Proposal ID | 079084 |
| Title | UV TO HARD X-RAY PROPERTIES OF RAD INEFFIC LOW LUMIN AGN NGC 3998 AND NGC 4579 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0790840101 |
| DOI | https://doi.org/10.5270/esa-5r7bqn5 |
| Principal Investigator, PI | Dr George Assaf Younes |
| Abstract | LLAGN likely have radiatively-inefficient accretion flows (RIAFs) where at leastthe inner accretion disk is a spherical plasma while the outer regions may be ina standard geometrically-thin accretion disk. We propose to observe two of thebrightest LLAGN with NuSTAR and XMM-Newton. The NuSTAR data will provide, forthe first time, coverage of these sources up to 50 keV, and theNuSTAR+XMM-Newton broad band spectrum will allow for the measurement (or placingstringent constraints) on the high energy cutoff in these sources, allowing fora comparison to luminous AGN. Using the XMM-Newton OM, these data will providesimultaneous UV-X-ray SED that can be fit to RIAF models. All this will add tothe growing number of NuSTAR AGN and extend the hard X-ray properties to very low Eddington rates. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2016-10-26T13:48:38Z/2016-12-06T16:56:14Z |
| 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 | 2017-12-22T23:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "brightest llagn", "spherical plasma", "NuSTAR", "hard xray properties", "low eddington rates", "XMM", "NGC 3998", "outer region", "luminous agn", "inner accretion disk", "xmm newton", "xmm newton om", "nustar data", "riaf models", "ngc 4579", "XMM-Newton", "placing stringent constraints", "energy cutoff", "nustar agn" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr George Assaf Younes, 2017, 'UV TO HARD X-RAY PROPERTIES OF RAD INEFFIC LOW LUMIN AGN NGC 3998 AND NGC 4579', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-5r7bqn5 |