|Title||Hunting for gamma Cas objects|
|Author||Dr Yael Naze|
|Description||gamma Cas objects are Be stars presenting an unusually intense and hard X-ray emission. Currently, only about a dozen such objects are known and it is well possible that additional cases, even bright ones, remain undetected. To improve the situation, we propose to observe a set of well-chosen Be stars with snapshots to search for the characteristic gamma Cas signatures.|
|Publication||Three discoveries of u03b3 Cas analogues from dedicated XMM-Newton observations of Be stars . Nazu00e9, Yau00ebl, Motch, Christian, et all. . MNRAS . 493-2511 . 2020 . 2020MNRAS.493.2511N ,
|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, 2020-05-03T22:00:00Z, 082031, 17.56_20190403_1200. https://doi.org/10.5270/esa-97lizme|