A dataset provided by the European Space Agency

Name 086091
Title Understanding Projection Effects in Dark Energy Survey Cluster Selection


DOI https://doi.org/10.57780/esa-m9tsrua
Author Prof Tesla Jeltema
Description Clusters of galaxies in optical imaging surveys like the DES have the
statistical power to be the single most constraining probe of dark energy.
However, realizing this potential relies on our ability to control for
systematics, the largest remaining of which are the effects of projection on
cluster selection and mass determinations. We propose XMM observations of six
DES clusters where existing spectroscopy indicates a significant contamination
from projection/correlated structure resulting in high velocity dispersions for
their richness. These data, along with existing data for an additional five
clusters, will allow us to understand the origin of this population (truly
massive clusters, low mass clusters, unvirialized projections) and their contribution to the DES cluster catalog.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2021-01-03T04:50:14Z/2021-01-03T09:50:14Z
Version 18.02_20200221_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2022-01-27T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Prof Tesla Jeltema, 2022, 086091, 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-m9tsrua