| Proposal ID | 090183 |
| Title | Measuring Projection Effects in Optical Cluster Catalogues |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0901830301 |
| DOI | https://doi.org/10.57780/esa-70k0l4c |
| Principal Investigator, PI | Mr Justin Myles |
| Abstract | The impact of projection effects on optical, photometric galaxy clusterselection has recently been clarified at z ~ 0.1 using extensive spectroscopy ofputative member galaxies. The projected fraction of photometrically associatedgalaxies has been constrained as a function of richness, along with therelations between photometric and spectroscopically-corrected richness andvelocity dispersion. We propose XMM-Newton observations of a complete sub-sampleof these clusters at high richness to obtain low-scatter X-ray mass proxies.These measurements will provide independent, complementary information onprojection effects and, crucially, will allow the scatter ofspectroscopically-corrected richness with mass to be quantified. |
| Publications | No publications found for current proposal! |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2022-06-05T03:38:43Z/2022-11-07T21:15:40Z |
| Version | 20.09_20221024_1724 |
| 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 | 2023-11-30T00:00:00Z |
| Last Update | 2026-03-04 |
| Keywords | "extensive spectroscopy", "XMM", "complete sub sample", "xmm newton", "projected fraction", "XMM-Newton", "complementary information", "optical cluster catalogues", "velocity dispersion", "projection effects", "spectroscopically corrected richness" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Mr Justin Myles, 2023, 'Measuring Projection Effects in Optical Cluster Catalogues', 20.09_20221024_1724, European Space Agency, https://doi.org/10.57780/esa-70k0l4c |