| Name | 015087 |
| Title | Spectroscopy of Z>4 Quasars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0150870201 |
| DOI | https://doi.org/10.5270/esa-egx7fkg |
| Author | European Space Agency |
| Description | We propose to measure the X-ray spectra of 5 quasars with z>4. We have carried out a survey of 14 optically bright, radio-quiet z>4 quasars using short Chandra ACIS-S exposures. From the measured fluxes, we can estimate exposure times required for spectroscopy. To date, only four z>4 quasars have X-ray spectroscopy, and all 4 are radio-loud blazars. Our sample includes one z=5 quasar, and we ask for a deep exposure which may detect its flux to 60 keV in the rest frame. We can test whether the high energy turnover seen in local Seyferts is present in this z=5 quasar. The only other z>5 quasar with a measured X-ray flux is too faint to obtain spectroscopy in a reasonable exposure time. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2002-12-20T01:42:09Z/2003-07-15T14:26:39Z |
| 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 | 2004-11-18T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2004, Spectroscopy Of Z&Amp;Gt;4 Quasars, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-egx7fkg |