| Name | 079063 |
| Title | THE NATURE OF THE SOFT EXCESS IN THE RADIO AND GAMMA-RAY LOUD NLS1 PKS 2004-447 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0790630101 |
| DOI | https://doi.org/10.5270/esa-zk3mw2s |
| Author | European Space Agency |
| Description | X-ray emission in excess of the intrinsic power law below 2 keV is a typical feature of radio-quiet active galactic nuclei (AGN). It has now been observed in a few sources of the newly-discovered class of radio-loud and gamma-ray emitting narrow-line Seyfert 1 (gamma-NLS1) galaxies. But the nature of this component in radio-loud AGN is not clear. Very recently, we found tentative evidence for the presence of a variable soft excess in the gamma-NLS1 galaxy PKS 2004-447 (Kreikenbohm et al. 2015, A&A, in press). Here, we propose a target-of-opportunity observation to study this peculiar component in this key source for the class of gamma-NLS1 galaxies. The unique joint NuSTAR-XMM-Newton program allows for the first reliable detection of the soft excess in this source. |
| Publication | No observations found associated with the current proposal |
| 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 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 | 2017-05-20T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 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 |