| Proposal ID | 086388 |
| Title | XMM-Newton characterisation of missed extended galaxy groups in the RASS |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0863880101 |
| DOI | https://doi.org/10.57780/esa-epnuhu6 |
| Principal Investigator, PI | Prof Thomas Reiprich |
| Abstract | In Xu et al. (2018) we report the detection of very extended (r_500>15 arcmin)X- ray galaxy groups not included in any previous X-ray or SZ cluster catalogs.We select 4 of these groups whose X-ray fluxes are above the nominal flux-limitsof previous RASS cluster catalogs (>3 x10^-12 erg s^-1 cm^-2 in the 0.1-2.4 keVenergy band) to be followed up by XMM-Newton. They have low mass (~10^13 M_Sun),are at low redshift (z<0.08), and appear to exhibit flatter surface brightnessdistributions than usual. The XMM-Newton observations will allow us to determinethe reasons why this potentially new class of objects has been missed inprevious X-ray surveys and the impact on the sample incompleteness when usinggalaxy cluster counts for cosmology. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-07-05T16:28:25Z/2020-10-08T01:01:28Z |
| Version | 21.51_20241115_1113 |
| 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 | 2021-10-31T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "xray surveys", "XMM-Newton", "xmm newton characterisation", "xray fluxes", "galaxy cluster counts", "sample incompleteness", "kev energy band", "rass cluster catalogs", "XMM", "nominal flux limits", "low mass", "low redshift z", "sz cluster catalogs", "xmm newton" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Thomas Reiprich, 2021, 'XMM-Newton characterisation of missed extended galaxy groups in the RASS', 21.51_20241115_1113, European Space Agency, https://doi.org/10.57780/esa-epnuhu6 |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |