A dataset provided by the European Space Agency

Name: X-ray weak broad-line quasars: absorption or intrinsic X-ray weakness
Published: 2005-01-20T00:00:00Z

Proposal ID	014874
Title	X-ray weak broad-line quasars: absorption or intrinsic X-ray weakness
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148740101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148740201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148740301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148740401 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148740501 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148740601 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148740701 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148740801 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148742101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148742201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148742401 ... https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148742501 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148742601
DOI	https://doi.org/10.5270/esa-zrbak7m
Principal Investigator, PI	Mr Guido Risaliti
Abstract	We propose to observe a sample of 20 soft X-ray weak, optically red quasars,discovered by the Hamburg Quasar Survey. The lack of detection in the ROSATPSPC, despite their relatively bright optical emission make them a peculiarclass of quasars, classified as type 1 in the optical but type 2 in the X-rays.Establishing the X-ray properties of these objects is important for (1) theX-ray background synthesis models (they could be the missing QSO2s), (2) theunified models (they challenge the traditional torus model) and (3) the longdebated problem on the discrepancy between optical and X-ray luminosityfunctions. XMM provides the unique opportunity to observe a well defined sampleof such sources and measure their absorption column density in many cases.
Publications	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 The X-ray Energy Dependence of the Relation Between Optical and X-ray Emission in Quasars \|Young, M., Elvis, M., \| ApJ \| 708-1388 \| 2010 \| 2010ApJ...708.1388Y \| http://ui.adsabs.harvard.edu/#abs/2010ApJ...708.1388Y 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 Studying the X-ray/UV Variability of Active Galactic Nuclei with data from Swift and XMM archives \|Turriziani, Sara, \| JPhCS \| 280-12005 \| 2011 \| 2011JPhCS.280a2005T \| http://ui.adsabs.harvard.edu/#abs/2011JPhCS.280a2005T New constraints on the X-ray spectral properties of type 1 active galactic nuclei \|Scott, A. E., Stewart, G. C., et al. \| MNRAS \| 417-992 \| 2011 \| 2011MNRAS.417..992S \| http://ui.adsabs.harvard.edu/#abs/2011MNRAS.417..992S 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 X-ray Emission from Optically Selected Radio-intermediate and Radio-loud Quasars \|Miller, B. P., Brandt, W. N., et al. \| ApJ \| 726-20 \| 2011 \| 2011ApJ...726...20M \| http://ui.adsabs.harvard.edu/#abs/2011ApJ...726...20M A combined optical and X-ray study of unobscured type 1 active galactic nuclei - I. Optical spectra and spectral energy distribution modelling \|Jin, Chichuan, Ward, Martin, et al. \| MNRAS \| 420-1825 \| 2012 \| 2012MNRAS.420.1825J \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.420.1825J 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 XMM-Newton spectroscopy of high-redshift quasars \|Page, K. L., Reeves, J. N., et al. \| MNRAS \| 364-195 \| 2005 \| 2005MNRAS.364..195P \| http://ui.adsabs.harvard.edu/#abs/2005MNRAS.364..195P Identifying XMM-Newton observations affected by solar wind charge exchange. Part I \|Carter, J. A., Sembay, S., \| A&A \| 489-837 \| 2008 \| 2008A&A...489..837C \| http://ui.adsabs.harvard.edu/#abs/2008A&A...489..837C Identification of a Wide, Low-Mass Multiple System Containing the Brown Dwarf 2MASS J0850359+105716 \|Faherty, Jacqueline K., Burgasser, Adam J., et al. \| AJ \| 141-71 \| 2011 \| 2011AJ....141...71F \| http://ui.adsabs.harvard.edu/#abs/2011AJ....141...71F 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 An XMM-Newton Survey of the Soft X-ray Background. I. The O VII and O VIII Lines Between l = 120 and l = 240 \|Henley, David B., Shelton, Robin L., \| ApJS \| 187-388 \| 2010 \| 2010ApJS..187..388H \| http://ui.adsabs.harvard.edu/#abs/2010ApJS..187..388H A serendipitous XMM survey of the SDSS: the evolution of the colour-magnitude diagram of X-ray AGN from z= 0.8 to 0.1 \|Georgakakis, Antonis, Nandra, K., \| MNRAS \| 414-992 \| 2011 \| 2011MNRAS.414..992G \| http://ui.adsabs.harvard.edu/#abs/2011MNRAS.414..992G 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 Fe Kalpha line profile in AGNs: average shape and redshift dependence \|Mao, Wei-Ming, Hu, Chen, et al. \| RAA \| 10-905 \| 2010 \| 2010RAA....10..905M \| http://ui.adsabs.harvard.edu/#abs/2010RAA....10..905M CAIXA: a catalogue of AGN in the XMM-Newton archive. I. Spectral analysis \|Bianchi, S., Guainazzi, M., et al. \| A&A \| 495-421 \| 2009 \| 2009A&A...495..421B \| http://ui.adsabs.harvard.edu/#abs/2009A&A...495..421B 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 Exospheric solar wind charge exchange as seen by XMM-Newton \|Carter, J. A., Semba, S., \| AN \| 333-313 \| 2012 \| 2012AN....333..313C \| http://ui.adsabs.harvard.edu/#abs/2012AN....333..313C Detectability of low-energy X-ray spectral components in type 1 active galactic nuclei \|Scott, A. E., Stewart, G. C., \| MNRAS \| 423-2633 \| 2012 \| 2012MNRAS.423.2633S \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.423.2633S The cosmological analysis of X-ray cluster surveys - II. Application of the CR-HR method to the XMM archive \|Clerc, N., Sadibekova, T., et al. \| MNRAS \| 423-3561 \| 2012 \| 2012MNRAS.423.3561C \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.423.3561C 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 Variability and the X-ray/UV ratio of active galactic nuclei \|Vagnetti, F., Turriziani, S., et al. \| A&A \| 519-17 \| 2010 \| 2010A&A...519A..17V \| http://ui.adsabs.harvard.edu/#abs/2010A&A...519A..17V The X-ray luminous galaxies optically classified as star forming are mostly narrow line Seyfert 1 s \|Castello-Mor, N., Barcons, X., et al. \| A&A \| 544-48 \| 2012 \| 2012A&A...544A..48C \| http://ui.adsabs.harvard.edu/#abs/2012A&A...544A..48C 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 A combined optical and X-ray study of unobscured type 1 active galactic nuclei - III. Broad-band SED properties \|Jin, Chichuan, Ward, Martin, \| MNRAS \| 425-907 \| 2012 \| 2012MNRAS.425..907J \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.425..907J The XMM-Newton serendipitous ultraviolet source survey catalogue \|Page, M. J., Brindle, C., et al. \| MNRAS \| 426-903 \| 2012 \| 2012MNRAS.426..903P \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.426..903P 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 On the Iwasawa-Taniguchi effect of radio-quiet AGN \|Bianchi, S., Guainazzi, M., et al. \| A&A \| 467-19 \| 2007 \| 2007A&A...467L..19B \| http://ui.adsabs.harvard.edu/#abs/2007A&A...467L..19B Properties of the integrated spectrum of serendipitous 2XMM catalog sources \|Chaudhary, P., Brusa, M., et al. \| A&A \| 518-58 \| 2010 \| 2010A&A...518A..58C \| http://ui.adsabs.harvard.edu/#abs/2010A&A...518A..58C Rest-frame stacking of 2XMM catalog sources. Properties of the Fe Kalpha line \|Chaudhary, P., Brusa, M., et al. \| A&A \| 537-6 \| 2012 \| 2012A&A...537A...6C \| http://ui.adsabs.harvard.edu/#abs/2012A&A...537A...6C 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 virgul 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 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 The Fifth Data Release Sloan Digital Sky Survey/XMM-Newton Quasar Survey \|Young, M., Elvis, M., \| ApJS \| 183-17 \| 2009 \| 2009ApJS..183...17Y \| http://ui.adsabs.harvard.edu/#abs/2009ApJS..183...17Y A statistical relation between the X-ray spectral index and Eddington ratio of active galactic nuclei in deep surveys \|Brightman, M., Silverman, J. D., et al. \| MNRAS \| 433-2485 \| 2013 \| 2013MNRAS.433.2485B \| http://ui.adsabs.harvard.edu/#abs/2013MNRAS.433.2485B The 2XMMi/SDSS Galaxy Cluster Survey. III. Clusters associated with spectroscopically targeted luminous red galaxies in SDSS-DR10 \|Takey, A., Schwope, A., \| A&A \| 564-54 \| 2014 \| 2014A&A...564A..54T \| http://ui.adsabs.harvard.edu/#abs/2014A&A...564A..54T 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 Obscuration-dependent Evolution of Active Galactic Nuclei \|Buchner, Johannes, Georgakakis, Antonis, et al. \| ApJ \| 802-89 \| 2015 \| 2015ApJ...802...89B \| http://ui.adsabs.harvard.edu/#abs/2015ApJ...802...89B Reaching the peak of the quasar spectral energy distribution - I. Observations and models \|Collinson, James S., Ward, Martin J., et al. \| MNRAS \| 449-2174 \| 2015 \| 2015MNRAS.449.2174C \| http://ui.adsabs.harvard.edu/#abs/2015MNRAS.449.2174C ERRATUM: The Fifth Data Release Sloan Digital Sky Survey/XMM-Newton Quasar Survey (2009, ApJS, 183, 17) \|Young, M., Elvis, M., \| ApJS \| 185-250 \| 2009 \| 2009ApJS..185..250Y \| http://ui.adsabs.harvard.edu/#abs/2009ApJS..185..250Y CAIXA: a catalogue of AGN in the XMM-Newton archive. II. Multiwavelength correlations \|Bianchi, S., Bonilla, N. F., et al. \| A&A \| 501-915 \| 2009 \| 2009A&A...501..915B \| http://ui.adsabs.harvard.edu/#abs/2009A&A...501..915B Sunyaev-Zel.dovich 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 Do the spectral energy distributions of type 1 active galactic nuclei show diversity? \|Scott, A. E., Stewart, G. C., \| MNRAS \| 438-2253 \| 2014 \| 2014MNRAS.438.2253S \| http://ui.adsabs.harvard.edu/#abs/2014MNRAS.438.2253S 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 Tight Relation between X-Ray and Ultraviolet Luminosity of Quasars \|Lusso, E., Risaliti, G., \| ApJ \| 819-154 \| 2016 \| 2016ApJ...819..154L \| http://ui.adsabs.harvard.edu/#abs/2016ApJ...819..154L 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 Way.s 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 SPIDERS: the spectroscopic follow-up of X-ray selected clusters of galaxies in SDSS-IV \|Clerc, N., Merloni, A., et al. \| MNRAS \| 463-4490 \| 2016 \| 2016MNRAS.463.4490C \| http://ui.adsabs.harvard.edu/#abs/2016MNRAS.463.4490C 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 A new sample of X-ray selected narrow emission-line galaxies. II. Looking for True Seyfert 2 \|Pons, E., Watson, M. G., \| A&A \| 594-72 \| 2016 \| 2016A&A...594A..72P \| http://ui.adsabs.harvard.edu/#abs/2016A&A...594A..72P Dependence of the broad Fe Kalpha line on the physical parameters of AGN \|Liu, Zhu, Yuan, Weimin, et al. \| MNRAS \| 463-684 \| 2016 \| 2016MNRAS.463..684L \| http://ui.adsabs.harvard.edu/#abs/2016MNRAS.463..684L Reaching the peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy \|Collinson, James S., Ward, Martin J., et al. \| MNRAS \| 465-358 \| 2017 \| 2017MNRAS.465..358C \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.465..358C Determining the torus covering factors for a sample of type 1 AGN in the local Universe \|Ezhikode, Savithri H., Gandhi, Poshak, et al. \| MNRAS \| 472-3492 \| 2017 \| 2017MNRAS.472.3492E \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.472.3492E 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 A Candidate Tidal Disruption Event in a Quasar at z = 2.359 from Abundance Ratio Variability \|Liu, Xin, Dittmann, Alexander, et al. \| ApJ \| 859-8 \| 2018 \| 2018ApJ...859....8L \| http://ui.adsabs.harvard.edu/#abs/2018ApJ...859....8L Chandra Survey of Nearby Galaxies: Testing the Accretion Model for Low-luminosity AGNs \|She, Rui, Ho, Luis C., et al. \| ApJ \| 859-152 \| 2018 \| 2018ApJ...859..152S \| http://ui.adsabs.harvard.edu/#abs/2018ApJ...859..152S Imaging Plasma Density Structures in the Soft X-Rays Generated by Solar Wind Charge Exchange with Neutrals \|Sibeck, David G., Allen, R., et al. \| SSRv \| 214-79 \| 2018 \| 2018SSRv..214...79S \| http://ui.adsabs.harvard.edu/#abs/2018SSRv..214...79S 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 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 X-ray properties of the X-CLASS-redMaPPer galaxy cluster sample: the luminosity-temperature relation \|Molham, Mona, Clerc, Nicolas, et al. \| MNRAS \| 494-161 \| 2020 \| 2020MNRAS.494..161M \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.494..161M Accretion History of AGNs. II. Constraints on AGN Spectral Parameters Using the Cosmic X-Ray Background \|Ananna, Tonima Tasnim, Treister, Ezequiel, et al. \| ApJ \| 889-17 \| 2020 \| 2020ApJ...889...17A \| http://ui.adsabs.harvard.edu/#abs/2020ApJ...889...17A A Comparison of X-Ray Photon Indices among the Narrow- and Broad-line Seyfert 1 Galaxies \|Ojha, Vineet, Chand, Hum, et al. \| ApJ \| 896-95 \| 2020 \| 2020ApJ...896...95O \| http://ui.adsabs.harvard.edu/#abs/2020ApJ...896...95O Multiwavelength classification of X-ray selected galaxy cluster candidates using convolutional neural networks \|Kosiba, Matej, Lieu, Maggie, et al. \| MNRAS \| 496-4141 \| 2020 \| 2020MNRAS.496.4141K \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.496.4141K SPIDERS: overview of the X-ray galaxy cluster follow-up and the final spectroscopic data release \|Clerc, N., Kirkpatrick, C. C., et al. \| MNRAS \| 497-3976 \| 2020 \| 2020MNRAS.497.3976C \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.497.3976C 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 A Luminous X-Ray Transient in SDSS J143359.16+400636.0: A Likely Tidal Disruption Event \|Brightman, Murray, Ward, Charlotte, et al. \| ApJ \| 909-102 \| 2021 \| 2021ApJ...909..102B \| http://ui.adsabs.harvard.edu/#abs/2021ApJ...909..102B 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 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 X-ray emission from a rapidly accreting narrow-line Seyfert 1 galaxy at z = 6.56 \|Wolf, J., Nandra, K., et al. \| A&A \| 669-127 \| 2023 \| 2023A&A...669A.127W \| http://ui.adsabs.harvard.edu/#abs/2023A&A...669A.127W Dependency of optical/UV parameters on X-ray spectral index in AGNs \|Nour, D., Sriram, K., \| JHEAp \| 37-34 \| 2023 \| 2023JHEAp..37...34N \| http://ui.adsabs.harvard.edu/#abs/2023JHEAp..37...34N 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 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
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2002-11-12T07:49:30Z/2003-12-19T00:32:29Z
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	2005-01-20T00:00:00Z
Keywords	"", "xray weakness", "xray properties", "unified models", "xray luminosity functions", "XMM", "qso2s "", "absorption column density", "soft xray weak", "defined sample", "rosat pspc", "traditional torus model", "optically red quasars", "hamburg quasar survey", "ROSAT"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Mr Guido Risaliti, 2005, 'X-ray weak broad-line quasars: absorption or intrinsic X-ray weakness', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-zrbak7m