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 | 2025-01-27 |
Keywords | "x ray variability", "ionization parameter", "soft xray spectrum", "blazar pmn00525 3343", "cold matter", "active nucleus", "xmm newton spectrum", "XMM-Newton", "column density", "pmn0525 3343", "ionized matter", "recombination time", "BeppoSAX", "column reduced", "bepposax spectra", "XMM", "1e22 pcmsq" |
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 |