Proposal ID | 014950 |
Title | X-ray variability in the z=4.4 blazar, PMN0525-3343 |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0149500601 |
DOI | https://doi.org/10.5270/esa-gt49ehw |
Principal Investigator, PI | Prof Andrew Fabian |
Abstract | A comparison of the XMM-Newton spectrum of the redshift 4.4 blazarPMN00525-3343 with earlier ASCA and BeppoSAX spectra show a dramaticchange in the soft X-ray spectrum of the source. The intrinsic columndensity, if due to cold matter, has dropped by a factor of 10 from1e23 to 1e22 pcmsq. If, as is likely, the absorption is by ionizedmatter, then the ionization parameter has increased and the columnreduced by a factor of three. We propose to observe the object 5 timesover 2 months in order to monitor such absorption changes. This willenable the recombination time and thus properties of the absorber insuch a massive young active nucleus to be determined. |
Publications |
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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 Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 |
Last Update | 2025-08-04 |
Keywords | "XMM", "bepposax spectra", "XMM-Newton", "cold matter", "ionized matter", "xmm newton spectrum", "1e22 pcmsq", "ionization parameter", "BeppoSAX", "active nucleus", "blazar pmn00525 3343", "column reduced", "pmn0525 3343", "x ray variability", "soft xray spectrum", "column density", "recombination time" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Prof Andrew Fabian, 2004, 'X-ray variability in the z=4.4 blazar, PMN0525-3343', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-gt49ehw |