| Proposal ID | 030115 |
| Title | Probing the intimate link between accretion and the Broad Line Region |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0301150101 |
| DOI | https://doi.org/10.5270/esa-2m8pgg2 |
| Principal Investigator, PI | Dr Fabrizio Nicastro |
| Abstract | 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. |
| Publications |
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| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2008-08-29T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "closely relates", "spectropolarimetric sample", "xmm newton", "intimate link", "significance bigger", "total exposure", "accretion rate", "XMM-Newton", "broad line region", "sigma findings", "existing sample", "kev luminosity", "hidden blrs", "low significance", "eddington units", "minimum threshold value", "central engine", "accretion rate larger", "XMM" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | 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 |