| Name | 014941 |
| Title | X-ray Spectra of High Redshift (z>4) Quasars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0149410401 |
| DOI | https://doi.org/10.5270/esa-si51j7n |
| Author | Dr Smita Mathur |
| Description | We propose to harness both the unequalled sensitivity and broad energy band of XMM to systematically study a sample of high redshift (z>4) quasars, the most luminous, youngest and least studies objects known. XMM can determine accurately both the absorption column density and the underlying spectral shape of the X-ray emission allowing us to resolve intriguing, outstanding questions such as: Is the apparent difference between the X-ray spectra of high-redshift radio-loud and radio-quiet quasars real? If so, is it explained by intrinsic absorption or by different evolution of the X-ray spectrum with redshift? What constraints can we place on the X-ray spectral evolution with redshift and/or luminosity for each class? What limits can we put on intervening Damped Ly-alpha systems? |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2003-05-17T06:09:29Z/2003-05-17T15:44:04Z |
| 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 | 2004-05-31T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Smita Mathur, 2004, 014941, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-si51j7n |