A dataset provided by the European Space Agency

Proposal ID 006579
Title Possible very distant or optically dark cluster of galaxies
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0065790101

DOI https://doi.org/10.5270/esa-s2gx5yc
Principal Investigator, PI Dr Alexey Vikhlinin
Abstract We propose a snapshot (5 ks) XMM observation of an extended X-ray sourcedetected 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. Apossible nature of this source is either optically dark, but X-ray brightcluster, or a hot (T>8 keV) cluster at a very high redshift (z>1). The goalof the proposed XMM observation, that utilizes the large area and goodangular resolution of XMM, is to determine unambiguously whether the X-raysource is extended. This would provide a basis for deeper X-rayobservations, and very deep infrared and radio followup.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-11-12T20:10:02Z/2001-11-12T22:56:01Z
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2002-12-06T00:00:00Z
Keywords "optically dark cluster", "deep infrared", "kev cluster", "XMM", "redshift z", "xray source", "rosat pspc image", "optically dark", "cluster survey", "optical counterparts", "deeper xray", "faint magnitude limits", "angular resolution", "xray bright cluster", "ROSAT"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Alexey Vikhlinin, 2002, 'Possible very distant or optically dark cluster of galaxies', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-s2gx5yc