We propose to observe with XMM-Newton a sample of 12 Sy2s with and withouthidden BLRs, extracted from the spectropolarimetric sample of Tran, for a totalexposure of 203 ks. The main goal of this proposal is to measure the 2-10 keVluminosity of these sources and so the accretion rate in Eddington units. Thiswill 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 aminimum threshold value and much larger than that of Sy2s without BLRs. Thisclosely relates the existence of the BLRs to the physical state of the centralengine in AGNs. The new observations will more than double the existing sampleand will allow us to test our hypothesis at a significance bigger than 10 sigma.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-05-09T10:45:08Z/2006-04-22T04:51:29Z
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.
European Space Agency, Dr Fabrizio Nicastro, 2008, 'Probing the intimate link between accretion and the Broad Line Region', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-2m8pgg2
