|Title||Does the Wolf-Rayet Star WR 66 Harbor a Compact Companion|
|Author||Dr Stephen Skinner|
|Description||Two independent studies have detected short-period optical variability in the Wolf-Rayet star WR 66. The optical period P = 3.5-4.1 hr is too short to be explained by the stars rotation. The most likely causes are stellar pulsations or a close companion (possibly a BH or NS) orbiting deep in the WR wind. We propose to obtain the first pointed X-ray observation of WR 66. Its X-ray spectral and timing properties will allow us to place it into context with other WR stars and may shed light on its unusual variability.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2022-03-04T00:00:00Z, 086289, 18.02_20200221_1200. https://doi.org/10.5270/esa-[xxxxxxx]|