A dataset provided by the European Space Agency

Proposal ID 020463
Title THE LENSING CLUSTER IN THE WIDEST SEPARATION GRAVITIONAL LENS
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204630101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204630301

DOI https://doi.org/10.5270/esa-x440hd3
Principal Investigator, PI Dr CHRIS IMPEY
Abstract We propose deep XMM imaging of a system of two QSOs separated by 33 arcsecondsat z=2.4, that is likely the most widely separated gravitational lens known. Theevidence of lensing is (1) the overall similarity of the optical spectra, (2)the almost identical Lyman-alpha forest near the emission redshift, and (3) thepresence of a bright galaxy near the implied lensing mass center. The 15 ksintegration time is designed to easily detect a cluster of the mass implied by alens model at the most probable redshift (z=0.44) and marginally detect acluster at the highest plausible redshift (z=1). The X-ray properties of thisfirst ever mass-selected cluster are of interest, and the confirmation of even asingle lens of this separation leads to significant cosmological constraints.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-08-02T13:30:49Z/2005-02-07T22:36:42Z
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 2006-02-25T00:00:00Z
Keywords "xray properties", "single lens", "optical spectra", "XMM", "redshift z", "cosmological constraints", "deep xmm imaging", "integration time", "probable redshift z", "emission redshift", "separation leads", "mass implied", "qsos separated", "bright galaxy", "lens model"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr CHRIS IMPEY, 2006, 'THE LENSING CLUSTER IN THE WIDEST SEPARATION GRAVITIONAL LENS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-x440hd3