A dataset provided by the European Space Agency

Name 055471
Title Deep Minimum States of AGNs


DOI 10.5270/esa-hxw3qcc
Author Dr Norbert Schartel
Description The deep minimum state of AGNs is characterized by a strongly suppressed or even total absence of the primary continuum. As the continuum disappears weak spectral features like relativistic- ally broad iron lines or "narrow" soft X-ray emission lines become highly significant and their parameters can be determined with high accuracy. Therefore deep minimum states offer unique possibilities to constrain the physics of the different X-ray emission mechanisms in the very cores of AGN, including the immediate vicinity of the supermassive black holes. Applying our experience gained in spring 2007 with a successful trigger of a 200ks-observation, we propose long observations of AGNs in deep minimum state triggered based on Swift and XMM-Newton slews observations.
Publication 1H 0707-495 in 2011: an X-ray source within a gravitational radius of the event horizon . Fabian, A. C., Zoghbi, A., et all. . MNRAS . 419-116 . 2012 . 2012MNRAS.419..116F ,
The quasar PG 0844+349 in an X-ray weak state . Gallo, L. C., Grupe, D., et all. . MNRAS . 412-161 . 2011 . 2011MNRAS.412..161G ,
CAIXA: a catalogue of AGN in the XMM-Newton archive. III. Excess variance analysis . Ponti, G., Papadakis, I., et all. . A&A . 542-83 . 2012 . 2012A&A...542A..83P ,
X-ray variability of 104 active galactic nuclei. XMM-Newton power-spectrum density profiles . Gonzalez-Martin, O., Vaughan, S., . A&A . 544-80 . 2012 . 2012A&A...544A..80G ,
An XMM-Newton Survey of the Soft X-Ray Background. II. An All-Sky Catalog of Diffuse O VII and O VIII Emission Intensities . Henley, David B., Shelton, Robin L., . ApJS . 202-14 . 2012 . 2012ApJS..202...14H ,
A Comparison of Hard X-ray Photon Indices and Iron Kalpha Emission Lines in X-ray Luminous Narrow- and Broad-line Seyfert 1 Galaxies . Zhou, Xin-Lin, Zhang, Shuang-Nan, . ApJ . 713-11 . 2010 . 2010ApJ...713L..11Z ,
The origin of the lag spectra observed in AGN: Reverberation and the propagation of X-ray source fluctuations . Wilkins, D. R., Fabian, A. C., . MNRAS . 430-247 . 2013 . 2013MNRAS.430..247W ,
A Magnetic Reconnection Origin for the Soft X-Ray Excess in an Active Galactic Nucleus . Zhong, Xiaogu, Wang, Jiancheng, . Ap...
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2009-05-03T05:04:05Z/2011-01-13T21:22:08Z
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 2012-01-27T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-01-27T00:00:00Z, 055471, 17.56_20190403_1200. https://doi.org/10.5270/esa-hxw3qcc