|Title||Early evolution of AGN X-ray coronae and the X-ray, BLR, disc-wind connection|
|Author||Dr Giovanni Miniutti|
|Description||We request a quasi-simultaneous XMM-Newton and HST-STIS observation of GSN 069, a high-Eddington ratio true-unabsorbed Seyfert 2 galaxy candidate with ultra-soft X-ray spectrum. From our study of previous X-ray-optical spectra and of UV photometric data, we infer that the lack of BLR in this peculiar object may be attributed to ether (i) the lack of hard X-ray emission or (ii) an evolutionary scenario in which the BLR are just forming. Recent Swift pointings have revealed the emergence of hard X-rays in GSN 069, making the proposed observation highly timely. GSN 069 may represent a true Rosetta stone with which to follow the formation and early evolution of the X-ray corona and to study the connection between X-rays and the BLR-disc-wind system.|
|Publication||The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
A Long Decay of X-Ray Flux and Spectral Evolution in the Supersoft Active Galactic Nucleus GSN 069 . Shu, X. W., Wang, S. S., et all. . ApJ . 857-16 . 2018 . 2018ApJ...857L..16S ,
Nine-hour X-ray quasi-periodic eruptions from a low-mass black hole galactic nucleus . Miniutti, G., Saxton, R. D., et all. . Natur . 573-381 . 2019 . 2019Natur.573..381M ,
|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, 2016-01-09T23:00:00Z, 074096, 17.56_20190403_1200. https://doi.org/10.5270/esa-2ij9pzm|