| Proposal ID | 076489 |
| Title | Late X-ray observations to unveil non-Forward Shock components in GRB afterglows |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0764890201 |
| DOI | https://doi.org/10.5270/esa-n7ctiqy |
| Principal Investigator, PI | Dr Massimiliano De Pasquale |
| Abstract | Certain features of Gamma-Ray Bursts (GRBs) are hard to explain in the contextof the Forward Shock (FS) model. Specifically, X-ray light curves of a few GRBafterglows show a steep drop not seen in the optical. A solution is that theearly X-ray emission is of internal origin, possibly powered by a newly bornmagnetar. When this ceases, the X-ray emission drops. The optical is entirely FSemission. If this model holds true, the late X-ray flux should decay similarlyto the optical, when the FS emission prevails. We test this scenario, with lateobservations of 2 Swift GRBs. Measuring the X-ray flux we can infer the ejectaenergy and how the magnetar central engine distributes the energy of the eventinto different channels. The predicted flux, too faint for Swift, requires XMM-Newton observations. |
| Publications |
|
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2017-12-14T06:46:07Z/2017-12-18T01:08:16Z |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2019-01-09T23:00:00Z |
| Keywords | "internal origin", "XMM-Newton", "xmm newton", "swift grbs", "fs emission prevails", "XMM", "xray flux", "predicted flux", "ejecta energy", "xray light curves", "late xray", "fs emission", "forward shock components", "grb afterglows", "xray emission drops", "model holds", "late xray flux", "xray emission", "born magnetar" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Massimiliano De Pasquale, 2019, 'Late X-ray observations to unveil non-Forward Shock components in GRB afterglows', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-n7ctiqy |