A dataset provided by the European Space Agency

Name: Study of the Soft Excess / Warm Absorber in a Sample of AGN
Published: 2002-03-22T00:00:00Z

Proposal ID	011291
Title	Study of the Soft Excess / Warm Absorber in a Sample of AGN
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0112910101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0112910201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0112910301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0112910401 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0112910501
DOI	https://doi.org/10.5270/esa-y30orc9
Principal Investigator, PI	Dr Martin Turner
Abstract	GT-A sample of AGN showing structure in their soft X-rayspectra is to be observed. The physics of the spectralstructure may be 1) a soft excess component above theunderlying power law, possibly from the emission of theaccretion disk, or/and 2) selective absorption due to awarm absorber. The candidate objects have been selected by a systematic study of ROSAT PSPC spectra in comparisonto hard (2-10 keV) spectra measured by HEAO-1, EXOSATor Ginga.
Publications	The history of the iron Kalpha line profile in the Piccinotti AGN ESO 198-G24 \|Guainazzi M. \| A&A \| 401-903 \| 2003 \| 2003A&A...401..903G \| http://ui.adsabs.harvard.edu/#abs/2003A&A...401..903G Exploring the X-ray sky with the XMM-Newton bright serendipitous survey \|Della Ceca R. Maccacaro T. et al. \| A&A \| 428-383 \| 2004 \| 2004A&A...428..383D \| http://ui.adsabs.harvard.edu/#abs/2004A&A...428..383D On the variability of the iron Kalpha line in Mrk 841 \|Longinotti A. L. Nandra K. et al. \| MNRAS \| 355-929 \| 2004 \| 2004MNRAS.355..929L \| http://ui.adsabs.harvard.edu/#abs/2004MNRAS.355..929L Unveiling the broad band X-ray continuum and iron line complex in Mrk 841 \|Petrucci P. O. Ponti G. et al. \| A&A \| 470-889 \| 2007 \| 2007A&A...470..889P \| http://ui.adsabs.harvard.edu/#abs/2007A&A...470..889P High-resolution X-ray spectroscopy of the Seyfert 1 Mrk 841: insights into the warm absorber and warm emitter \|Longinotti A. L. Costantini E. et al. \| A&A \| 510-92 \| 2010 \| 2010A&A...510A..92L \| http://ui.adsabs.harvard.edu/#abs/2010A&A...510A..92L PKS 1502+106: A New and Distant Gamma-ray Blazar in Outburst Discovered by the Fermi Large Area Telescope \|Abdo A. A. Ackermann M. et al. \| ApJ \| 710-810 \| 2010 \| 2010ApJ...710..810A \| http://ui.adsabs.harvard.edu/#abs/2010ApJ...710..810A X-QUEST: A Comprehensive X-ray Study of Local ULIRGS and QSOs \|Teng Stacy H. Veilleux Sylvain \| ApJ \| 725-1848 \| 2010 \| 2010ApJ...725.1848T \| http://ui.adsabs.harvard.edu/#abs/2010ApJ...725.1848T High-precision multi-band measurements of the angular clustering of X-ray sources \|Ebrero J. Mateos S. et al. \| A&A \| 500-749 \| 2009 \| 2009A&A...500..749E \| http://ui.adsabs.harvard.edu/#abs/2009A&A...500..749E The XMM-Newton serendipitous survey. V. The Second XMM-Newton serendipitous source catalogue \|Watson M. G. Schroder A. C. et al. \| A&A \| 493-339 \| 2009 \| 2009A&A...493..339W \| http://ui.adsabs.harvard.edu/#abs/2009A&A...493..339W An Extremely Luminous Panchromatic Outburst from the Nucleus of a Distant Galaxy \|Levan A. J. Tanvir N. R. et al. \| Sci \| 333-199 \| 2011 \| 2011Sci...333..199L \| http://ui.adsabs.harvard.edu/#abs/2011Sci...333..199L Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras \|Mateos S. Saxton R. D. et al. \| A&A \| 496-879 \| 2009 \| 2009A&A...496..879M \| http://ui.adsabs.harvard.edu/#abs/2009A&A...496..879M The XMM Cluster Survey: optical analysis methodology and the first data release \|Mehrtens Nicola Romer A. Kathy et al. \| MNRAS \| 423-1024 \| 2012 \| 2012MNRAS.423.1024M \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.423.1024M An X-ray Baldwin effect for the narrow Fe Kalpha lines observed in active galactic nuclei \|Page K. L. OBrien P. T. et al. \| MNRAS \| 347-316 \| 2004 \| 2004MNRAS.347..316P \| http://ui.adsabs.harvard.edu/#abs/2004MNRAS.347..316P Relativistic spectral features from X-ray-illuminated spots and the measure of the black hole mass in active galactic nuclei \|Dovciak M. Bianchi S. et al. \| MNRAS \| 350-745 \| 2004 \| 2004MNRAS.350..745D \| http://ui.adsabs.harvard.edu/#abs/2004MNRAS.350..745D The XMM-SSC survey of hard-spectrum XMM-Newton sources - I. Optically bright sources \|Page M. J. Lehmann I. et al. \| MNRAS \| 378-1335 \| 2007 \| 2007MNRAS.378.1335P \| http://ui.adsabs.harvard.edu/#abs/2007MNRAS.378.1335P The Difference in Narrow Fe Kalpha Line Emission Between Seyfert 1 and Seyfert 2 Galaxies \|Liu Teng Wang Jun-Xian \| ApJ \| 725-2381 \| 2010 \| 2010ApJ...725.2381L \| http://ui.adsabs.harvard.edu/#abs/2010ApJ...725.2381L The XMM-Newton HBS28 sample: Studying the obscuration in hard X-ray selected AGNs \|Caccianiga A. Severgnini P. et al. \| A&A \| 416-901 \| 2004 \| 2004A&A...416..901C \| http://ui.adsabs.harvard.edu/#abs/2004A&A...416..901C X-ray reprocessing in Seyfert galaxies: Simultaneous XMM-Newton/BeppoSAX observations \|Bianchi S. Matt G. et al. \| A&A \| 422-65 \| 2004 \| 2004A&A...422...65B \| http://ui.adsabs.harvard.edu/#abs/2004A&A...422...65B The XMM-Newton view of PG quasars. II. Properties of the Fe K_alpha line \|Jimenez-Bailon E. Piconcelli E. et al. \| A&A \| 435-449 \| 2005 \| 2005A&A...435..449J \| http://ui.adsabs.harvard.edu/#abs/2005A&A...435..449J High precision X-ray log N - log S distributions: implications for the obscured AGN population \|Mateos S. Warwick R. S. et al. \| A&A \| 492-51 \| 2008 \| 2008A&A...492...51M \| http://ui.adsabs.harvard.edu/#abs/2008A&A...492...51M The Properties and Evolution of the Highly Ionized Gas in MR 2251-178 \|Kaspi Shai Netzer Hagai et al. \| ApJ \| 611-68 \| 2004 \| 2004ApJ...611...68K \| http://ui.adsabs.harvard.edu/#abs/2004ApJ...611...68K Narrow Iron Kalpha Lines in Active Galactic Nuclei: Evolving Populations? \|Zhou Xin-Lin Wang Jian-Min \| ApJ \| 618-83 \| 2005 \| 2005ApJ...618L..83Z \| http://ui.adsabs.harvard.edu/#abs/2005ApJ...618L..83Z Fe K Line Profile in Low-Redshift Quasars: Average Shape and Eddington Ratio Dependence \|Inoue Hirohiko Terashima Yuichi \| ApJ \| 662-860 \| 2007 \| 2007ApJ...662..860I \| http://ui.adsabs.harvard.edu/#abs/2007ApJ...662..860I X-Ray Absorption from the Milky Way Halo and the Local Group \|Bregman Joel N. Lloyd-Davies Edward J. \| ApJ \| 669-990 \| 2007 \| 2007ApJ...669..990B \| http://ui.adsabs.harvard.edu/#abs/2007ApJ...669..990B The XMM-Newton serendipitous survey. VI. The X-ray luminosity function \|Ebrero J. Carrera F. J. et al. \| A&A \| 493-55 \| 2009 \| 2009A&A...493...55E \| http://ui.adsabs.harvard.edu/#abs/2009A&A...493...55E Search for narrow energy-shifted lines in AGN spectra in the XMM-Newton archive \|Longinotti A. L. Bianchi S. et al. \| AN \| 327-1020 \| 2006 \| 2006AN....327.1020L \| http://ui.adsabs.harvard.edu/#abs/2006AN....327.1020L Statistics of relativistically broadened Fe Kalpha lines in AGN \|Guainazzi M. Bianchi S. \| AN \| 327-1032 \| 2006 \| 2006AN....327.1032G \| http://ui.adsabs.harvard.edu/#abs/2006AN....327.1032G The origin of the strong soft excess and puzzling iron line complex in Mkn 841 \|Petrucci P. O. Ponti G. et al. \| AN \| 327-1043 \| 2006 \| 2006AN....327.1043P \| http://ui.adsabs.harvard.edu/#abs/2006AN....327.1043P Breaking the sigma8-Omega m Degeneracy Using the Clustering of High-z X-ray Active Galactic Nuclei \|Basilakos Spyros Plionis Manolis \| ApJ \| 714-185 \| 2010 \| 2010ApJ...714L.185B \| http://ui.adsabs.harvard.edu/#abs/2010ApJ...714L.185B FeXXV and FeXXVI lines from low-velocity photoionized gas in the X-ray spectra of active galactic nuclei \|Bianchi Stefano Matt Giorgio et al. \| MNRAS \| 357-599 \| 2005 \| 2005MNRAS.357..599B \| http://ui.adsabs.harvard.edu/#abs/2005MNRAS.357..599B An All-Sky Atlas of Radio/X-ray Associations \|Flesch E. \| PASA \| 27-283 \| 2010 \| 2010PASA...27..283F \| http://ui.adsabs.harvard.edu/#abs/2010PASA...27..283F A ROSAT Survey of Contact Binary Stars \|Geske M. T. Gettel S. J. \| AJ \| 131-633 \| 2006 \| 2006AJ....131..633G \| http://ui.adsabs.harvard.edu/#abs/2006AJ....131..633G Mining for normal galaxies in the first XMM-Newton Serendipitous Source Catalog \|Georgakakis A. E. Chavushyan V. et al. \| MNRAS \| 367-1017 \| 2006 \| 2006MNRAS.367.1017G \| http://ui.adsabs.harvard.edu/#abs/2006MNRAS.367.1017G The XMM Cluster Survey: X-ray analysis methodology \|Lloyd-Davies E. J. Romer A. Kathy et al. \| MNRAS \| 418-14 \| 2011 \| 2011MNRAS.418...14L \| http://ui.adsabs.harvard.edu/#abs/2011MNRAS.418...14L Classification of X-Ray Sources in the XMM-Newton Serendipitous Source Catalog \|Lin Dacheng Webb Natalie A. \| ApJ \| 756-27 \| 2012 \| 2012ApJ...756...27L \| http://ui.adsabs.harvard.edu/#abs/2012ApJ...756...27L An XMM-Newton Survey of the Soft X-Ray Background. II. An All-Sky Catalog of Diffuse O VII and O VIII Emission Intensities \|Henley David B. Shelton Robin L. \| ApJS \| 202-14 \| 2012 \| 2012ApJS..202...14H \| http://ui.adsabs.harvard.edu/#abs/2012ApJS..202...14H Ensemble X-ray variability of active galactic nuclei from serendipitous source catalogues \|Vagnetti F. Turriziani S. \| A&A \| 536-84 \| 2011 \| 2011A&A...536A..84V \| http://ui.adsabs.harvard.edu/#abs/2011A&A...536A..84V The stellar content of the XMM-Newton bright serendipitous survey \|Lopez-Santiago J. Micela G. et al. \| A&A \| 463-165 \| 2007 \| 2007A&A...463..165L \| http://ui.adsabs.harvard.edu/#abs/2007A&A...463..165L Cross-correlation of the 2XMMi catalogue with Data Release 7 of the Sloan Digital Sky Survey \|Pineau F.-X. Motch C. et al. \| A&A \| 527-126 \| 2011 \| 2011A&A...527A.126P \| http://ui.adsabs.harvard.edu/#abs/2011A&A...527A.126P A systematic cross-search for radio/infrared counterparts of XMM- Newton sources \|Combi J. A. Albacete Colombo J. F. et al. \| Ap&SS \| 331-53 \| 2011 \| 2011Ap&SS.331...53C \| http://ui.adsabs.harvard.edu/#abs/2011Ap&SS.331...53C Exploring X-ray and radio emission of type 1 AGN up to z ~ 2.3 \|Ballo L. Heras F. J. H. et al. \| A&A \| 545-66 \| 2012 \| 2012A&A...545A..66B \| http://ui.adsabs.harvard.edu/#abs/2012A&A...545A..66B The XMM-Newton serendipitous source catalogue \|Watson M. G. Pye J. P. et al. \| AN \| 324-89 \| 2003 \| 2003AN....324...89W \| http://ui.adsabs.harvard.edu/#abs/2003AN....324...89W The 2-8 keV cosmic X-ray background spectrum as observed with XMM-Newton \|De Luca A. Molendi S. \| A&A \| 419-837 \| 2004 \| 2004A&A...419..837D \| http://ui.adsabs.harvard.edu/#abs/2004A&A...419..837D X-Ray Properties of the Northern Galactic Cap Sources in the 58 Month Swift/BAT Catalog \|Vasudevan Ranjan V. Brandt William N. et al. \| ApJ \| 763-111 \| 2013 \| 2013ApJ...763..111V \| http://ui.adsabs.harvard.edu/#abs/2013ApJ...763..111V High spectral resolution X-ray observations of AGN \|Kaastra J. S. \| AN \| 329-162 \| 2008 \| 2008AN....329..162K \| http://ui.adsabs.harvard.edu/#abs/2008AN....329..162K A Comparison of Hard X-ray Photon Indices and Iron Kalpha Emission Lines in X-ray Luminous Narrow- and Broad-line Seyfert 1 Galaxies \|Zhou Xin-Lin Zhang Shuang-Nan \| ApJ \| 713-11 \| 2010 \| 2010ApJ...713L..11Z \| http://ui.adsabs.harvard.edu/#abs/2010ApJ...713L..11Z On the origin of the featureless soft X-ray excess emission from the Seyfert 1 galaxy ESO 198-G24 \|Laha Sibasish Dewangan Gulab C. \| MNRAS \| 437-2664 \| 2014 \| 2014MNRAS.437.2664L \| http://ui.adsabs.harvard.edu/#abs/2014MNRAS.437.2664L Are X-Ray Emitting Coronae around Supermassive Black Holes Outflowing? \|Liu Teng Wang Jun-Xian et al. \| ApJ \| 783-106 \| 2014 \| 2014ApJ...783..106L \| http://ui.adsabs.harvard.edu/#abs/2014ApJ...783..106L The diversity of quasars unified by accretion and orientation \|Shen Yue Ho Luis C. \| Natur \| 513-210 \| 2014 \| 2014Natur.513..210S \| http://ui.adsabs.harvard.edu/#abs/2014Natur.513..210S Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift \|Yershov V. N. \| Ap&SS \| 354-97 \| 2014 \| 2014Ap&SS.354...97Y \| http://ui.adsabs.harvard.edu/#abs/2014Ap&SS.354...97Y Modeling of the broad band X-ray spectra of the Seyfert Mrk 841 \|Petrucci P. O. Boisson C. et al. \| RMxAC \| 32-104 \| 2008 \| 2008RMxAC..32..104P \| http://ui.adsabs.harvard.edu/#abs/2008RMxAC..32..104P The relationship between O IIIlambda5007 A equivalent width and obscuration in active galactic nuclei \|Caccianiga A. Severgnini P. \| MNRAS \| 415-1928 \| 2011 \| 2011MNRAS.415.1928C \| http://ui.adsabs.harvard.edu/#abs/2011MNRAS.415.1928C Sunyaev-Zeldovich effect or not? Detecting the main foreground effect of most galaxy clusters \|Xiao Weike Chen Chen et al. \| MNRAS \| 432-41 \| 2013 \| 2013MNRAS.432L..41X \| http://ui.adsabs.harvard.edu/#abs/2013MNRAS.432L..41X Swift follow-up of IceCube triggers and implications for the Advanced-LIGO era \|Evans P. A. Osborne J. P. et al. \| MNRAS \| 448-2210 \| 2015 \| 2015MNRAS.448.2210E \| http://ui.adsabs.harvard.edu/#abs/2015MNRAS.448.2210E XMM-Newton publication statistics \|Ness J.-U. Parmar A. N. et al. \| AN \| 335-210 \| 2014 \| 2014AN....335..210N \| http://ui.adsabs.harvard.edu/#abs/2014AN....335..210N The Rotation of the Hot Gas around the Milky Way \|Hodges-Kluck Edmund J. Miller Matthew J. \| ApJ \| 822-21 \| 2016 \| 2016ApJ...822...21H \| http://ui.adsabs.harvard.edu/#abs/2016ApJ...822...21H Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function \|Vagnetti F. Middei R. et al. \| A&A \| 593-55 \| 2016 \| 2016A&A...593A..55V \| http://ui.adsabs.harvard.edu/#abs/2016A&A...593A..55V The Interaction of the Fermi Bubbles with the Milky Ways Hot Gas Halo \|Miller Matthew J. Bregman Joel N. \| ApJ \| 829-9 \| 2016 \| 2016ApJ...829....9M \| http://ui.adsabs.harvard.edu/#abs/2016ApJ...829....9M The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch Eric W. \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F Anisotropy of the galaxy cluster X-ray luminosity-temperature relation \|Migkas Konstantinos Reiprich Thomas H. \| A&A \| 611-50 \| 2018 \| 2018A&A...611A..50M \| http://ui.adsabs.harvard.edu/#abs/2018A&A...611A..50M Testing warm Comptonization models for the origin of the soft X-ray excess in AGNs \|Petrucci P.-O. Ursini F. et al. \| A&A \| 611-59 \| 2018 \| 2018A&A...611A..59P \| http://ui.adsabs.harvard.edu/#abs/2018A&A...611A..59P The XMM Cluster Survey: Present status and latest results \|Viana P. T. P. Mehrtens N. et al. \| AN \| 334-462 \| 2013 \| 2013AN....334..462V \| http://ui.adsabs.harvard.edu/#abs/2013AN....334..462V The Spectrum of the Universe \|Hill Ryley Masui Kiyoshi W. \| ApSpe \| 72-663 \| 2018 \| 2018ApSpe..72..663H \| http://ui.adsabs.harvard.edu/#abs/2018ApSpe..72..663H The evolving X-ray spectrum of active galactic nuclei: Evidence for an increasing reflection fraction with redshift \|Avirett-Mackenzie M. S. Ballantyne D. R. \| MNRAS \| 486-3488 \| 2019 \| 2019MNRAS.486.3488A \| http://ui.adsabs.harvard.edu/#abs/2019MNRAS.486.3488A Testing emergent gravity on galaxy cluster scales \|Tamosiunas Andrius Bacon David et al. \| JCAP \| 5-53 \| 2019 \| 2019JCAP...05..053T \| http://ui.adsabs.harvard.edu/#abs/2019JCAP...05..053T Chandra Follow-up of the SDSS DR8 Redmapper Catalog Using the MATCha Pipeline \|Hollowood Devon L. Jeltema Tesla et al. \| ApJS \| 244-22 \| 2019 \| 2019ApJS..244...22H \| http://ui.adsabs.harvard.edu/#abs/2019ApJS..244...22H Stellar mass as a galaxy cluster mass proxy: application to the Dark Energy Survey redMaPPer clusters \|Palmese A. Annis J. et al. \| MNRAS \| 493-4591 \| 2020 \| 2020MNRAS.493.4591P \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.493.4591P An X-Ray- and SZ-bright Diffuse Source toward M31: A Local Hot Bridge \|Qu Zhijie Huang Rui et al. \| ApJ \| 907-14 \| 2021 \| 2021ApJ...907...14Q \| http://ui.adsabs.harvard.edu/#abs/2021ApJ...907...14Q Estimating the size of X-ray lamppost coronae in active galactic nuclei \|Ursini F. Dovu010diak M. et al. \| A&A \| 644-132 \| 2020 \| 2020A&A...644A.132U \| http://ui.adsabs.harvard.edu/#abs/2020A&A...644A.132U 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 Nitrogen X-ray absorption in the local ISM \|Gatuzz Efrain Garcu00eda Javier A. \| MNRAS \| 504-4460 \| 2021 \| 2021MNRAS.504.4460G \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.504.4460G The Solar Cycle Temporal Variation of the Solar Wind Charge Exchange X-Ray Lines \|Qu Zhijie Koutroumpa Dimitra et al. \| ApJ \| 930-21 \| 2022 \| 2022ApJ...930...21Q \| http://ui.adsabs.harvard.edu/#abs/2022ApJ...930...21Q From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez Antonio C. \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R 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 X-ray view of dissipative warm corona in active galactic nuclei \|Palit B. Ru00f3u017cau0144ska A. et al. \| A&A \| 690-A308 \| 2024 \| 2024A&A...690A.308P \| http://ui.adsabs.harvard.edu/#abs/2024A&A...690A.308P Search for Young Stellar Objects within 4XMM-DR13 Using CatBoost and SPE \|Ma Xiangyao Zhang Yanxia et al. \| AJ \| 168-210 \| 2024 \| 2024AJ....168..210M \| http://ui.adsabs.harvard.edu/#abs/2024AJ....168..210M 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 Windy or Not: Radio Parsec-scale Evidence for a Broad-line Region Wind in Radio-quiet Quasars \|Chen Sina Laor Ari et al. \| ApJ \| 975-35 \| 2024 \| 2024ApJ...975...35C \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...975...35C
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2000-11-29T15:00:12Z/2001-01-13T07:47:16Z
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.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2002-03-22T00:00:00Z
Last Update	2025-08-04
Keywords	"spectral structure", "soft xray spectra", "soft excess component", "soft excess", "rosat pspc spectra", "kev spectra", "selective absorption", "ROSAT", "accretion disk", "candidate objects", "warm absorber", "power law"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Martin Turner, 2002, 'Study of the Soft Excess / Warm Absorber in a Sample of AGN', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-y30orc9