GT-WR25, WN7+abs, exhibits the largest X-ray luminosity among Wolf-Rayet stars,suggesting a long-period colliding-wind binary system. XMM-RGS spectra willyield chemical abundances of the WR stellar wind and test evolutionary models. Three pointings of 30 ksec each will provide evidence on the X-ray variabilityof WR25, and information on the variability of the nearby binary HD93205 of typeO3V+O8V with P=6.08 days. XMM-EPIC spectra will be obtained at crucial orbitalphases of HD93205, in order study dynamical properties of the component winds.This is a joint program of the XMM-RGS and XMM-OM instrument teams.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2001-06-25T03:53:39Z/2001-06-30T15:07:35Z
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.
European Space Agency, Dr Albert Brinkman, 2003, 'GT Observations of Hot Stars: WR 25', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-fxk4ewl
