A dataset provided by the European Space Agency

Name 050553
Title X-ray investigation of the first gamma-ray emitter associated with a WR star
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505530101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505530201

DOI 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.
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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, 2009-06-06T00:00:00Z, 050553, 17.56_20190403_1200. https://doi.org/10.5270/esa-df7hryl