For the first time we have a sample of galaxy clusters of significant size (> 20clusters) selected on the basis of their weak lensing shear through the DeepLens Survey (DLS). We have obtained an initial look at our highest shear rankedcluster, A781, and 3 surrounding clusters with XMM-Newton and Chandra, and fromthis obtained temperature estimates but were unable to constrain their masses.We request deeper XMM and Chandra observations to obtain better mass estimatesto 1.) understand the robustness of weak lensing masses and the biases inherentin shear-selected cluster samples, 2.) determine whether M_xray/M_weaklens is auniversal diagnostic of cluster dynamical state, and 3.) characterize one of ourclusters which has an x-ray but no shear signal.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2007-04-14T01:00:36Z/2007-04-15T01:52:58Z
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, Ms Neelima Sehgal, 2008, 'Probing the M_xray - M_weaklens Relation for Shear-Selected Galaxy Clusters', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ex0umsg
