|Title||Variable absorption in BAL QSOs: catching the origin of AGN winds|
|Author||Dr Margherita Giustini|
|Description||We want to investigate the nature of the gas located in the central regions of QSOs. Hence, we propose to observe a small sample of four BAL QSOs, among the X-ray brightest in the Palomar Green sample. Our goal is to monitor the variability of their absorption properties to study the physics of the wind seen in BAL QSOs along the line of sight. As such, timescales of days and years must be investigated to probe distances between tens to thousands gravitational radii from the central SMBH. To this end, each source must have been observed at least three times by XMM-Newton (in at least 2 close pointings for the intra-day variability plus a distant one for the intra-year variability). We thus request that XMM-Newton re-observes some BAL QSOs for a total of 240 ks.|
|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, 2010-01-17T00:00:00Z, 055623, 17.56_20190403_1200. https://doi.org/10.5270/esa-a29zs04|