|Title||Late X-ray observations to unveil non-Forward Shock components in GRB afterglows|
|Author||Dr Massimiliano De Pasquale|
|Description||Certain features of Gamma-Ray Bursts (GRBs) are hard to explain in the context of the Forward Shock (FS) model. Specifically, X-ray light curves of a few GRB afterglows show a steep drop not seen in the optical. A solution is that the early X-ray emission is of internal origin, possibly powered by a newly born magnetar. When this ceases, the X-ray emission drops. The optical is entirely FS emission. If this model holds true, the late X-ray flux should decay similarly to the optical, when the FS emission prevails. We test this scenario, with late observations of 2 Swift GRBs. Measuring the X-ray flux we can infer the ejecta energy and how the magnetar central engine distributes the energy of the event into different channels. The predicted flux, too faint for Swift, requires XMM-Newton observations.|
|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, 2019-01-09T23:00:00Z, 076489, 17.56_20190403_1200. https://doi.org/10.5270/esa-n7ctiqy|