GT-The cluster IC 2391 is an ideal target to study the decline of X-ray fluxwith age, the existence of a related softening of the X-ray spectrum with age,and of a saturation level of the X-ray surface flux: it is so young (age virgul30Myr) that solar-type members have just arrived on the main-sequence, they havenot yet spun down, and they are very active. Being significantly younger thanother star clusters the observation of IC 2391 will provide data crucial tounderstand the evolution of stellar coronae spectra. The high quality XMMspectra will likely reveal a thermal coronal structure more complex than thatobtained with other instruments so far. IC 2391 has been the target of surveysand detailed optical and photometric studies in the optical band.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2001-11-20T09:49:22Z/2001-11-20T22:14:32Z
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 Martin Turner, 2003, 'EPIC Observation of the Open Cluster IC 2391', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-kjqpafg
