We request three XMM observations totaling 200ksec of the low-luminosity activegalaxy NGC4258. The proposed program will allow us to (1) Probe the accretiondisk geometry through the shape, strength and variability of the iron emissionline discovered by ASCA, (2) Search for the absorption line signatures of anionized outflow hinted at in Chandra ACIS data, (3) Obtain a unique probe theaccretion disk structure through month-to-month variations in the neutralabsorbing column. Given the details constraints on the geometry of this AGN andthe mass of the central black hole from radio observations of this object, theseX-ray investigations are key to understanding the physics of low-luminosityblack hole accretion.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-11-17T14:56:24Z/2006-11-18T11:20:56Z
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, Prof Christopher Reynolds, 2007, 'XMM-Newton observations of NGC4258', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-o8diovy
