We propose to observe the well known young gigaherz-peaked spectrum radio galaxyPKS 1718-649, which is part of TANAMI, the multiwavelength AGN monitoringprogram on the southern hemisphere. PKS 1718-649 turns out to be the onlysource, where variable free-free absorption has been detected in its radio core.Many publications emphasize the possibility of correlated X-ray absorption, dueto the very likely spatial vicinity of the radio and X-ray emission sites. Up tonow, however, no simultaneous X-ray and radio observations were conducted, whichis the aim of this proposal. As we will show, PKS 1718-649 also shows variableX-ray absorption and is therefore the source of choice for testing correlatedabsorption variability of the radio and the X-rays.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2017-03-05T14:40:11Z/2017-03-05T23:33:31Z
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.
European Space Agency, Mr Tobias Beuchert, 2018, 'Probing correlated X-ray and free-free absorption variability in PKS 1718-649', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-1rooqov
