We propose the first X-ray study of an unbiased sample of galaxy groups atintermediate redshifts. The proposed observations will allow us to determine thefraction of groups at these redshifts which contain a hot intragroup medium.This in turn provides a measurement of the dynamical state of each group.Combined with on-going studies of nearby group samples, the XMM-Newtonobservations will allow us investigate how the X-ray properties of groups havechanged in time.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-05-05T11:00:36Z/2006-11-21T17:06:24Z
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 John Mulchaey, 2007, 'An XMM-Newton Survey of Optically-Selected Groups at Intermediate Redshifts', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-olct9zi
