We are requesting time to re-observe a rich cluster of galaxies (CL 1257+4738; z = 0.866) that we have observed with XMM-newton (obsID 0413380), but we onlyhad much less (how much is yet to be determined) than 16 ksec of usable data outof a 83 ksec observation. With these data we confirm the existence of diffuseX-ray emission. We tentatively conclude that the cluster is unusually cool forits bolometric luminosity and compared to all other clusters at this redshift.More observation time is needed to confirm or deny this result. The spectrum isso soft and the Chandra observation so short that we could not derive a spectrumfrom the Chandra data.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2008-12-18T21:40:19Z/2008-12-19T08:02:11Z
Version
17.56_20190403_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.
European Space Agency, Prof Melville Ulmer, 2010, 'A Request for a Re-observation of a Distant X-ray Luminous Cluster of Galaxies', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-m5dxsa3
