|Title||MEASURING HARD X-RAY LIGHT ECHOS IN NGC 4051|
|Author||Dr Tracey Turner|
|Description||X-ray reprocessing signatures appear in the timing and spectral characteristics of AGN. Especially valuable is the direct measurement of the reverberation delay of the reprocessor in response to X-ray continuum variations: extraction of the shape of the transfer function gives the location and extent of the circumnuclear gas. This is only possible in long observations of rapidly variable, bright AGN. To this end, we request a 300 ks NuSTAR exposure with 160 ks of XMM data, comprising the first joint observation of NGC 4051. NuSTAR opens up the critical window above 10 keV that is dominated by the undiluted light echo from the X-ray reprocessor. The proposed campaign will allow us to directly map the reverberating gas close to the black hole.|
|Publication||Spectral index-mass accretion rate correlation and evaluation of black hole masses in AGNs 3C 454.3 and M 87 . Titarchuk, Lev, Seifina, Elena, et all. . A&A . 633-73 . 2020 . 2020A&A...633A..73T ,
More than softer-when-brighter: The X-ray powerlaw spectral variability in NGC 4051 . Wu, Yun-Jing, Wang, Jun-Xian, et all. . SCPMA . 63-129512 . 2020 . 2020SCPMA..6329512W ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2019-11-26T23:00:00Z, 083043, 17.56_20190403_1200. https://doi.org/10.5270/esa-wwdsyog|