|Title||Probing correlated X-ray and free-free absorption variability in PKS 1718-649|
|Author||Mr Tobias Beuchert|
|Description||We propose to observe the well known young gigaherz-peaked spectrum radio galaxy PKS 1718-649, which is part of TANAMI, the multiwavelength AGN monitoring program on the southern hemisphere. PKS 1718-649 turns out to be the only source, where variable free-free absorption has been detected in its radio core. Many publications emphasize the possibility of correlated X-ray absorption, due to the very likely spatial vicinity of the radio and X-ray emission sites. Up to now, however, no simultaneous X-ray and radio observations were conducted, which is the aim of this proposal. As we will show, PKS 1718-649 also shows variable X-ray absorption and is therefore the source of choice for testing correlated absorption variability of the radio and the X-rays.|
|Publication||Extended X-ray emission in PKS 1718-649 . Beuchert, T., Rodriguez-Ardila, A., et all. . A&A . 612-4 . 2018 . 2018A&A...612L...4B ,
|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, 2018-03-22T23:00:00Z, 078453, 17.56_20190403_1200. https://doi.org/10.5270/esa-1rooqov|