There are only a few X-ray selected clusters with redshift greaterthan 0.8, making each of them a prime target of studies of clusterformation. We propose to observe the cluster RXJ1821+6828 at z=0.8108,found in the NEP region of the ROSAT All-Sky Survey, to derive theX-ray temperature distribution, measure the iron abundance, andobtain an high quality image. Temperature information for high-zclusters places strong constraints on cosmological models and onthe physical processes in the early epochs of our universe. Existinglower resolution X-ray images indicate that these clusters are oftenfilamentary with the X-ray flux generated at the impact point of the
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2002-11-09T06:38:14Z/2002-12-19T11:05:55Z
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 Isabella Gioia, 2004, 'RXJ1821+6828: Temperature Distribution and Metallicity for a z=0.81 cluster', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-fvxah55
