A dataset provided by the European Space Agency

Name 020206


DOI 10.5270/esa-puwijkf
Description About 10% of the quasars can be classified as soft X-ray-weak, whose X-ray emission is by a factor 10-30 fainter than in typical quasars. They show a strong correlation between Alpha(OX) and the C IV absorption equivalent width, which suggest that absorption is the primary cause of their soft X-ray- weakness. But the shape of the correlation can not be reproduced by an uniform screen covering both the X-ray source and the ultraviolet emission. Therefore either the UV and X-ray absorbers are not identical (warm absorber, partly covered, only scattered flux) or the X-ray weakness is due to a peculiar property of the nuclear emission, as extreme variability or unusual steepness.
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The XMM-Newton serendipitous survey. V. The Second XMM-Newton serendipitous source catalogue . Watson, M. G., Schroder, A. C., et all. . A&A . 493-339 . 2009 . 2009A&A...493..339W ,
Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras . Mateos, S., Saxton, R. D., et all. . A&A . 496-879 . 2009 . 2009A&A...496..879M ,
The XMM Cluster Survey: optical analysis methodology and the first data release . Mehrtens, Nicola, Romer, A. Kathy, et all. . MNRAS . 423-1024 . 2012 . 2012MNRAS.423.1024M ,
Variable X-ray absorption in the mini-BAL QSO PG 1126-041 . Giustini, M., Cappi, M., et all. . A&A . 536-49 . 2011 . 2011A&A...536A..49G ,
Statistics of relativistically broadened Fe Kalpha lines in AGN . Guainazzi, M., Bianchi, S., . AN . 327-1032 . 2006 . 2006AN....327.1032G ,
An All-Sky Atlas of Radio-X-ray Associations . Flesch, E., . PASA . 27-283 . 2010 . 2010PASA...27..283F ,
Fe Kalpha line profile in AGNs: average shape and redshift dependence . Mao, Wei-Ming, Hu, Chen, et all. . RAA . 10-905 . 2010 . 2010RAA....10..905M ,
CAIXA: a catalogue of AGN in the XMM-Newton archive. I. Spectral analysis . Bianchi, S., Guainaz...
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-12-31T01:12:42Z/2005-05-08T14:38:50Z
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 2006-06-15T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2006-06-15T00:00:00Z, 020206, 17.56_20190403_1200. https://doi.org/10.5270/esa-puwijkf