A dataset provided by the European Space Agency

Name 040056
Title XMM-Newton observations of NGC4258


DOI https://doi.org/10.5270/esa-o8diovy
Author Prof Christopher Reynolds
Description We request three XMM observations totaling 200ksec of the low-luminosity active galaxy NGC4258. The proposed program will allow us to (1) Probe the accretion disk geometry through the shape, strength and variability of the iron emission line discovered by ASCA, (2) Search for the absorption line signatures of an ionized outflow hinted at in Chandra ACIS data, (3) Obtain a unique probe the accretion disk structure through month-to-month variations in the neutral absorbing column. Given the details constraints on the geometry of this AGN and the mass of the central black hole from radio observations of this object, these X-ray investigations are key to understanding the physics of low-luminosity black hole accretion.
Publication No observations found associated with the current proposal
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 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 2007-12-12T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2007-12-12T00:00:00Z, 040056, 17.56_20190403_1200. https://doi.org/10.5270/esa-o8diovy