|Title||Shining light on obscured AGN outflows|
|Author||Prof Jelle Kaastra|
|Description||AGN can be obscured by gas streams close to the black hole that shield remote regions from ionising radiation. We witnessed such an event in NGC 5548 where 90% of the soft X-rays are blocked by a dense gas stream close to the BLR. Our joint observations with XMM-Newton, NuSTAR and HST-COS showed UV BAL lines associated with the X-ray absorption and allowed us to characterise this unique obscuration event completely. We propose to investigate a similar event in another Seyfert 1 using the same instruments. Swift monitoring will be used to find the event, which will be characterised by joint ToO observations with XMM-Newton (150 ks), HST-COS (4 orbits) and NuSTAR (50 ks).|
|Publication||Chasing obscuration in type-I AGN: discovery of an eclipsing clumpy wind at the outer broad-line region of NGC 3783 . Mehdipour, M., Kaastra, J. S., et all. . A&A . 607-28 . 2017 . 2017A&A...607A..28M ,
HST-COS observations of the newly discovered obscuring outflow in NGC 3783 . Kriss, G. A., Mehdipour, M., et all. . A&A . 621-12 . 2018 . 2018A&A...621A..12K ,
Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783 . Mao, Junjie, Mehdipour, M., et all. . A&A . 621-99 . 2019 . 2019A&A...621A..99M ,
Astrophysical plasma modeling of the hot Universe: Advances and challenges in high-resolution X-ray spectroscopy . Mao, Junjie, . PhDT . 0-123 . 2018 . 2018PhDT.......123M ,
HST-COS observations of the newly discovered obscuring outflow in NGC 3783 . Kriss, G. A., Mehdipour, M., et all. . A&A . 621-12 . 2019 . 2019A&A...621A..12K ,
Incoherent fast variability of X-ray obscurers. The case of NGC 3783 . De Marco, B., Adhikari, T. P., et all. . A&A . 634-65 . 2020 . 2020A&A...634A..65D ,
A Broadband X-Ray Study of a Sample of AGNs with [O III] Measured Inclinations . Zhao, X., Marchesi, S., et all. . ApJ . 894-71 . 2020 . 2020ApJ...894...71Z ,
|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, 2018-01-13T23:00:00Z, 078086, 17.56_20190403_1200. https://doi.org/10.5270/esa-tn09dfj|