| Proposal ID | 069338 |
| Title | Non-forward shock components in X-ray afterglows |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0693380301 |
| DOI | https://doi.org/10.5270/esa-vh51ryu |
| Principal Investigator, PI | Dr Massimiliano De Pasquale |
| Abstract | In the Forward Shock (FS) model, the GRB afterglow is produced in thecircumburst medium when the ejecta interacts with it. However, a few GRBs havean X-ray lightcurve with a very large change of decay slope, that is hard toexplain by a FS, while their optical behaviour is different and more consistentwith it. One proposed solution is that X-ray emission is produced within theejecta, and ends in a few ks. We propose to test this scenario by observing atlate epochs 2 GRBs with a large break in the X-ray lightcurve and detectedoptical afterglow with XMM-Newton. In this model, the X-ray flux at late epochsshould return to a shallower decay, similar to the optical, when the emissionfrom the FS prevails. XMM-Newton high sensitivity is required to constrain the X-ray flux at late times. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2013-05-13T03:12:55Z/2013-06-20T09:14:15Z |
| 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 | 2014-07-03T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "decay slope", "ejecta interacts", "grb afterglow", "fs prevails", "xmm newton", "shallower decay", "late epochs", "XMM-Newton", "xray lightcurve", "xray flux", "circumburst medium", "xray emission", "XMM", "xray afterglows", "forward shock components", "optical afterglow" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Massimiliano De Pasquale, 2014, 'Non-forward shock components in X-ray afterglows', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-vh51ryu |