| Name | 014950 |
| Title | X-ray variability in the z=4.4 blazar, PMN0525-3343 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0149500601 |
| DOI | https://doi.org/10.5270/esa-gt49ehw |
| Author | Prof Andrew Fabian |
| Description | A comparison of the XMM-Newton spectrum of the redshift 4.4 blazar PMN00525-3343 with earlier ASCA and BeppoSAX spectra show a dramatic change in the soft X-ray spectrum of the source. The intrinsic column density, if due to cold matter, has dropped by a factor of 10 from 1e23 to 1e22 pcmsq. If, as is likely, the absorption is by ionized matter, then the ionization parameter has increased and the column reduced by a factor of three. We propose to observe the object 5 times over 2 months in order to monitor such absorption changes. This will enable the recombination time and thus properties of the absorber in such a massive young active nucleus to be determined. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2003-02-14T08:29:23Z/2003-08-09T00:21:24Z |
| 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 | 2004-09-13T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2004-09-13T00:00:00Z, 014950, 17.56_20190403_1200. https://doi.org/10.5270/esa-gt49ehw |