X-ray emission in excess of the intrinsic power law below 2 keV is a typicalfeature of radio-quiet active galactic nuclei (AGN). It has now been observed ina few sources of the newly-discovered class of radio-loud and gamma-ray emittingnarrow-line Seyfert 1 (gamma-NLS1) galaxies. But the nature of this component inradio-loud AGN is not clear. Very recently, we found tentative evidence for thepresence of a variable soft excess in the gamma-NLS1 galaxy PKS 2004-447(Kreikenbohm et al. 2015, A&A, in press). Here, we propose atarget-of-opportunity observation to study this peculiar component in this keysource for the class of gamma-NLS1 galaxies. The unique joint NuSTAR-XMM-Newtonprogram allows for the first reliable detection of the soft excess in this source.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2016-05-05T00:27:40Z/2016-05-05T15:17:40Z
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, Ms Annika Kreikenbohm, 2017, 'THE NATURE OF THE SOFT EXCESS IN THE RADIO AND GAMMA-RAY LOUD NLS1 PKS 2004-447', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-zk3mw2s
