| Proposal ID | 020463 |
| Title | THE LENSING CLUSTER IN THE WIDEST SEPARATION GRAVITIONAL LENS |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204630101 |
| 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 |
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| 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 |
| Last Update | 2025-01-27 |
| Keywords | "redshift z", "separation leads", "integration time", "xray properties", "optical spectra", "probable redshift z", "deep xmm imaging", "single lens", "bright galaxy", "lens model", "XMM", "cosmological constraints", "emission redshift", "mass implied", "qsos separated" |
| 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 |