A dataset provided by the European Space Agency

Name: THE NATURE OF THE SOFT EXCESS IN THE RADIO AND GAMMA-RAY LOUD NLS1 PKS 2004-447
Published: 2017-05-20T22:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	079063
Title	THE NATURE OF THE SOFT EXCESS IN THE RADIO AND GAMMA-RAY LOUD NLS1 PKS 2004-447
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0790630101
DOI	https://doi.org/10.5270/esa-zk3mw2s
Principal Investigator, PI	Ms Annika Kreikenbohm
Abstract	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.
Publications	X-ray absorption towards high-redshift sources: probing the intergalactic medium with blazars \|Arcodia R. Campana S. et al. \| A&A \| 616-170 \| 2018 \| 2018A&A...616A.170A \| http://ui.adsabs.harvard.edu/#abs/2018A&A...616A.170A General Physical Properties of Gamma-Ray-emitting Narrow-line Seyfert 1 Galaxies \|Paliya Vaidehi S. Parker M. L. et al. \| ApJ \| 872-169 \| 2019 \| 2019ApJ...872..169P \| http://ui.adsabs.harvard.edu/#abs/2019ApJ...872..169P Broadband X-ray observations of four gamma-ray narrow-line Seyfert 1 galaxies \|Berton M. Braito V. et al. \| A&A \| 632-120 \| 2019 \| 2019A&A...632A.120B \| http://ui.adsabs.harvard.edu/#abs/2019A&A...632A.120B Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z Probing the physical properties of the intergalactic medium using SRG/eROSITA spectra from blazars \|Gatuzz E. Wilms J. et al. \| A&A \| 683-A213 \| 2024 \| 2024A&A...683A.213G \| http://ui.adsabs.harvard.edu/#abs/2024A&A...683A.213G The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII O VIII and Fe L-shell Transitions \|Pan Zeyang Qu Zhijie et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P Robust constraints on feebly interacting particles using XMM-Newton \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2016-05-05T00:27:40Z/2016-05-05T15:17:40Z
Version	21.51_20241115_1113
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.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2017-05-20T22:00:00Z
Last Update	2026-06-19
Keywords	"reliable detection", "XMM", "xray emission", "tentative evidence", "gamma nls1 galaxy", "2004 447 kreikenbohm", "NuSTAR", "power law", "XMM-Newton", "2004 447", "radio loud agn", "soft excess", "radio loud", "variable soft excess", "key source"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Ms Annika Kreikenbohm, 2017, 'THE NATURE OF THE SOFT EXCESS IN THE RADIO AND GAMMA-RAY LOUD NLS1 PKS 2004-447', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-zk3mw2s
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.