| Proposal ID | 055623 |
| Title | Variable absorption in BAL QSOs: catching the origin of AGN winds |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0556230101 |
| DOI | https://doi.org/10.5270/esa-a29zs04 |
| Principal Investigator, PI | Dr Margherita Giustini |
| Abstract | We want to investigate the nature of the gas located in the central regions ofQSOs. Hence, we propose to observe a small sample of four BAL QSOs, among theX-ray brightest in the Palomar Green sample. Our goal is to monitor thevariability of their absorption properties to study the physics of the wind seenin BAL QSOs along the line of sight. As such, timescales of days and years mustbe investigated to probe distances between tens to thousands gravitational radiifrom the central SMBH. To this end, each source must have been observed at leastthree times by XMM-Newton (in at least 2 close pointings for the intra-dayvariability plus a distant one for the intra-year variability). We thus requestthat XMM-Newton re-observes some BAL QSOs for a total of 240 ks. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-06-08T11:55:29Z/2008-12-13T23:23:47Z |
| 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 | 2010-01-17T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "variable absorption", "gas located", "close pointings", "agn winds", "central smbh", "xray brightest", "xmm newton", "variability plus", "probe distances", "XMM-Newton", "absorption properties", "palomar green sample", "XMM", "central region", "thousands gravitational radii", "bal qsos" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Margherita Giustini, 2010, 'Variable absorption in BAL QSOs: catching the origin of AGN winds', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-a29zs04 |