| Name | 050279 |
| Title | A Search for Synchrotron X-ray Emission From Radio Quasars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0502790101 |
| DOI | https://doi.org/10.5270/esa-rszcus8 |
| Author | Dr Hermine Landt |
| Description | We propose to observe four radio quasars with unusually high X-ray-radio core flux ratios. Such high values point to a synchrotron origin of their X-rays and this we wish to confirm. So far only low-power blazars, the BL Lacs, were known to have jets with synchrotron emission reaching energies as high as X-rays. Recently, synchrotron X-rays have been convincingly detected in one radio quasar, with suggestive evidence in four more. Establishing the existence of a large population of such sources is vital for our understanding of jet physics. In particular it will challenge the ..blazar sequence., a scenario which advocates that the frequency of the synchrotron emission peak in radio quasars is lower than that in BL Lacs since the particles in their jets suffer more severe Compton cooling. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2007-06-05T17:34:46Z/2008-03-05T03:52:14Z |
| 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 | 2009-04-03T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2009-04-03T00:00:00Z, 050279, 17.56_20190403_1200. https://doi.org/10.5270/esa-rszcus8 |