|Title||GT Observations of Active Cool Stars: AR Lac|
|Author||Dr Albert Brinkman|
|Description||GT-AR Lac is a fully eclipsing RS CVn binary system with extremely active coronae on both stars. Previous missions have found a prominent X-ray minimum around the optical primary eclipse when the G star is occulted, and a shallow minimum around secondary eclipse. We propose here to study one ingress to or one egress from the primary eclipse. We will use the EPIC cameras to obtain a light curve in unprecedented detail, the RGS combined with the EPICs to determine time-dependent emission measure distributions and abundances, and the RGS to search for time-height-dependent densities. Simultaneous optical and radio observations will be proposed. One EPIC MOS will be operated in TIMING-medium filter mode, while the pn will observe with the SML window and thick filter.|
|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, 2003-02-08T00:00:00Z, 011137, 17.56_20190403_1200. https://doi.org/10.5270/esa-pzhdmcf|