GT-Sigma Geminorum is an active, non-eclipsing RS CVn system. We propose a 40 ksobservation to investigate the differential emission measure (DEM), chemicalabundances, and density structure of the corona. Possible abundance variationswith plasma temperature or during flaring events will be searched for as well asbulk motion of the emitting plasma. The primary instrument will be the RGS. Toconstrain the high temperature end of the DEM, additional spectroscopy will beprovided by one EPIC MOS, used in timing mode, and by the EPIC PN in smallpartial window mode. The second EPIC MOS will be used in the full window mode tosearch for nearby contaminating sources. All EPICs will be used with thickfilters. Coordinated optical and radio observations will also be proposed.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2001-04-06T16:24:29Z/2001-04-07T07:54:40Z
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, 2002, 'GT Observations of Active Cool Stars: Sigma Gem', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-h4wpuqs
