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 minimumaround the optical primary eclipse when the G star is occulted, and a shallowminimum around secondary eclipse. We propose here to study one ingress to or oneegress from the primary eclipse. We will use the EPIC cameras to obtain a lightcurve in unprecedented detail, the RGS combined with the EPICs to determinetime-dependent emission measure distributions and abundances, and the RGS tosearch for time/height-dependent densities. Simultaneous optical and radioobservations will be proposed. One EPIC MOS will be operated in TIMING/mediumfilter mode, while the pn will observe with the SML window and thick filter.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2001-12-05T18:36:04Z/2001-12-06T03:33:49Z
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 Active Cool Stars: AR Lac', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-pzhdmcf
