| Name | 050553 |
| Title | X-ray investigation of the first gamma-ray emitter associated with a WR star |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505530101 |
| DOI | https://doi.org/10.5270/esa-df7hryl |
| Author | Mr Jean-Christophe Leyder |
| Description | A systematic search for hard X-ray and soft gamma-ray emission from Wolf-Rayet (WR) stars, performed using the ISGRI imager, led to the detection of WR 115 (26-51 keV). This high-energy emission is expected to be produced by non-thermal relativistic particles, through several possible mechanisms. However, it is still unknown which of these proposed mechanisms is responsible for the observed emission, and whether the corresponding X-ray emission is of a thermal or non-thermal origin. Therefore, we propose to observe this first gamma-ray emitter associated with a WR+O system. These observations of WR 115 with XMM-Newton will help to confirm the origin of the emission seen at higher energies, and to pinpoint the emission mechanisms thanks to a thorough analysis of its X-ray spectrum. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-04-10T11:43:50Z/2008-04-11T04:13:48Z |
| Version | 17.56_20190403_1200 |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2009-06-06T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Mr Jean-Christophe Leyder, 2009, 050553, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-df7hryl |