| Proposal ID | 086091 |
| Title | Understanding Projection Effects in Dark Energy Survey Cluster Selection |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860910601 |
| DOI | https://doi.org/10.57780/esa-m9tsrua |
| Principal Investigator, PI | Prof Tesla Jeltema |
| Abstract | Clusters of galaxies in optical imaging surveys like the DES have thestatistical power to be the single most constraining probe of dark energy.However, realizing this potential relies on our ability to control forsystematics, the largest remaining of which are the effects of projection oncluster selection and mass determinations. We propose XMM observations of sixDES clusters where existing spectroscopy indicates a significant contaminationfrom projection/correlated structure resulting in high velocity dispersions fortheir richness. These data, along with existing data for an additional fiveclusters, will allow us to understand the origin of this population (trulymassive clusters, low mass clusters, unvirialized projections) and their contribution to the DES cluster catalog. |
| Publications | No publications found for 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 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2022-01-27T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "des cluster", "correlated structure", "mass determinations", "low mass clusters", "existing spectroscopy", "des cluster catalog", "statistical power", "velocity dispersions", "existing data", "optical imaging surveys", "potential relies", "unvirialized projections", "cluster selection", "additional clusters", "XMM", "dark energy", "constraining probe" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Tesla Jeltema, 2022, 'Understanding Projection Effects in Dark Energy Survey Cluster Selection', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-m9tsrua |