A dataset provided by the European Space Agency

Name 086388
Title XMM-Newton characterisation of missed extended galaxy groups in the RASS


DOI https://doi.org/10.57780/esa-epnuhu6
Author Prof Thomas Reiprich
Description 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-limits of previous RASS cluster catalogs (>3 x10^-12 erg s^-1 cm^-2 in the 0.1-2.4 keV energy band) to be followed up by XMM-Newton. They have low mass (virgul10^13 M_Sun), are at low redshift (z<0.08), and appear to exhibit flatter surface brightness distributions than usual. The XMM-Newton observations will allow us to determine the reasons why this potentially new class of objects has been missed in previous X-ray surveys and the impact on the sample incompleteness when using galaxy cluster counts for cosmology.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2020-07-05T16:28:25Z/2020-10-08T01:01:28Z
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 2021-10-31T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2021, 086388, 18.02_20200221_1200. https://doi.org/10.57780/esa-epnuhu6