A dataset provided by the European Space Agency

Name 076379
Title The Hard X-ray Perspective on the Soft X-ray excess


DOI https://doi.org/10.5270/esa-9vo4jcy
Author Dr Ranjan Vasudevan
Description The physical origin of the soft excess in AGN remains hotly debated. Blurred ionised reflection, Comptonization, ionised absorption and other models can account for it, but 0.4-50keV observations are needed to break the degeneracy between models. Our recent work shows that short, simultaneous snapshots with XMM and NuSTAR can distinguish between reflection and absorption using only the strengths of the soft and hard excesses, without requiring more complex model fits. We propose to observe 7 extreme AGN from the hard X-ray-selected Swift-BAT catalogue jointly with XMM and NuSTAR in a 140 ks campaign. Our observations will constrain the soft excess production mechanisms in these sources using a novel, powerful technique,shedding light on this long-standing question in AGN science.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2015-07-05T21:43:58Z/2015-07-15T02:13:30Z
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 2016-07-29T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2016-07-29T22:00:00Z, 076379, 17.56_20190403_1200. https://doi.org/10.5270/esa-9vo4jcy