|Title||X-ray variability in the z=4.4 blazar, PMN0525-3343|
|Author||Prof Andrew Fabian|
|Description||A comparison of the XMM-Newton spectrum of the redshift 4.4 blazar PMN00525-3343 with earlier ASCA and BeppoSAX spectra show a dramatic change in the soft X-ray spectrum of the source. The intrinsic column density, if due to cold matter, has dropped by a factor of 10 from 1e23 to 1e22 pcmsq. If, as is likely, the absorption is by ionized matter, then the ionization parameter has increased and the column reduced by a factor of three. We propose to observe the object 5 times over 2 months in order to monitor such absorption changes. This will enable the recombination time and thus properties of the absorber in such a massive young active nucleus to be determined.|
|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, 2004-09-13T00:00:00Z, 014950, 17.56_20190403_1200. https://doi.org/10.5270/esa-gt49ehw|