| Name | 020463 |
| Title | THE LENSING CLUSTER IN THE WIDEST SEPARATION GRAVITIONAL LENS |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204630101 |
| DOI | https://doi.org/10.5270/esa-x440hd3 |
| Author | European Space Agency |
| Description | We propose deep XMM imaging of a system of two QSOs separated by 33 arcseconds at z=2.4, that is likely the most widely separated gravitational lens known. The evidence of lensing is (1) the overall similarity of the optical spectra, (2) the almost identical Lyman-alpha forest near the emission redshift, and (3) the presence of a bright galaxy near the implied lensing mass center. The 15 ks integration time is designed to easily detect a cluster of the mass implied by a lens model at the most probable redshift (z=0.44) and marginally detect a cluster at the highest plausible redshift (z=1). The X-ray properties of this first ever mass-selected cluster are of interest, and the confirmation of even a single lens of this separation leads to significant cosmological constraints. |
| Publication | No observations found associated with the current proposal |
| 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 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2006-02-25T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2006, The Lensing Cluster In The Widest Separation Gravitional Lens, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-x440hd3 |