|Title||Probing the intimate link between accretion and the Broad Line Region|
|Author||Dr Fabrizio Nicastro|
|Description||We propose to observe with XMM-Newton a sample of 12 Sy2s with and without hidden BLRs, extracted from the spectropolarimetric sample of Tran, for a total exposure of 203 ks. The main goal of this proposal is to measure the 2-10 keV luminosity of these sources and so the accretion rate in Eddington units. This will in turn allow us to verify our recent, low significance (3.2 sigma) findings that Sy2s with hidden BLRs have all accretion rate larger than a minimum threshold value and much larger than that of Sy2s without BLRs. This closely relates the existence of the BLRs to the physical state of the central engine in AGNs. The new observations will more than double the existing sample and will allow us to test our hypothesis at a significance bigger than 10 sigma.|
|Publication||No observations found associated with the current proposal|
|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, 2008-08-29T00:00:00Z, 030115, 17.56_20190403_1200. https://doi.org/10.5270/esa-2m8pgg2|