|Title||X-Ray afterglow of SWIFT J1644+57: a Compton echo?|
|Author||Prof Albert Kong|
|Description||Swift, Chandra, and XMM-Newtonhave found a weak but nearly constant X-ray component from the tidal disruption event Swift J1644+57 that appeared at virgul500 days and was visible at least until virgul1400 days after the stellar capture, which cannot be explained by standard tidal disruption theories. We suggest that this X-ray afterglow component may result from the Thomson scattering between the primary X-rays and its surrounding plasma, i.e., a Compton echo effect. The proposed XMM-Newton observation will allow us to test our theory and constrain the size and geometry of the surrounding gas cloud.|
|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, 2019-04-02T22:00:00Z, 080071, 17.56_20190403_1200. https://doi.org/10.5270/esa-ttg773a|