|Title||Possible very distant or optically dark cluster of galaxies|
|Author||Dr Alexey Vikhlinin|
|Description||We propose a snapshot (5 ks) XMM observation of an extended X-ray source detected in a ROSAT PSPC image as part of our serendipitous cluster survey. It has no optical counterparts down to faint magnitude limits in R and I. A possible nature of this source is either optically dark, but X-ray bright cluster, or a hot (T>8 keV) cluster at a very high redshift (z>1). The goal of the proposed XMM observation, that utilizes the large area and good angular resolution of XMM, is to determine unambiguously whether the X-ray source is extended. This would provide a basis for deeper X-ray observations, and very deep infrared and radio followup.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2002-12-06T00:00:00Z, 006579, 17.56_20190403_1200. https://doi.org/10.5270/esa-s2gx5yc|