We propose a new XMM-Newton monitoring of the X-ray obscured AGN in NGCvirgul4507,with the aim of testing a scenario where the variable X-ray absorption is due tothe broad emission line clouds. The identification of these two components issuggested by our previous monitoring of a few other sources (NGC 1365, NGC 4151,UGC 4203), where rapid X-ray absorption variability, suggestive of an extremelycompact X-ray absorber, has been found ..by chance. The new campaign we proposeis for the first time based on a precise prediction, rather than on a blindsearch, and will therefore provide a strong test of the general validity of thisnew scheme for the structure of the AGN circumnuclear medium.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2010-06-24T04:09:31Z/2010-08-03T06:59:07Z
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.
European Space Agency, Dr Guido Risaliti, 2011, 'X-ray monitoring of NGCvirgul4507: X-ray absorption by Broad Line Clouds', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-591xtqh
