|Title||Spectroscopy of Z>4 Quasars|
|Author||Prof Jill Bechtold|
|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|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2004-11-18T00:00:00Z, 015087, 17.56_20190403_1200. https://doi.org/10.5270/esa-egx7fkg|