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Black hole masses of intermediate-redshift quasars: near-infrared spectroscopy |
Authors: Dietrich, Matthias; Mathur, Smita; Grupe, Dirk; Komossa, Stefanie | Date of Publication (YYYY-MM-DD): 2009-05-10 | Title of Journal: The Astrophysical Journal | Volume: 696 | Issue / Number: 2 | Start Page: 1998 | End Page: 2013 | Document Type: Article | ID: 431662.0 |
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First detection of hard X-ray photons in the soft X-ray transient narrow-line Seyfert 1 galaxy WPVS 007: the X-ray photon distribution observed by Swift |
Authors: Grupe, Dirk; Leighly, Karen M.; Komossa, Stefanie | Date of Publication (YYYY-MM-DD): 2008-12 | Title of Journal: Astronomical Journal | Volume: 136 | Issue / Number: 6 | Start Page: 2343 | End Page: 2349 | Document Type: Article | ID: 400380.0 |
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Discovery of the narrow-line Seyfert 1 galaxy Markarian 335 in a historical low X-ray flux state |
Authors: Grupe, Dirk; Komossa, Stefanie; Gallo, Luigi C. | Date of Publication (YYYY-MM-DD): 2007-10-20 | Title of Journal: Astrophysical Journal | Volume: 668 | Issue / Number: 2 Part 2 | Start Page: L111 | End Page: L114 | Document Type: Article | ID: 324166.0 |
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Multiwavelength studies of AGN |
Authors: Grupe, Dirk | Place of Publication: Berlin | Publisher: Springer | Date of Publication (YYYY-MM-DD): 2004 | Name of Conference/Meeting: oward an International Virtual Observatory | Title of Proceedings: Toward an International Virtual Observatory | Start Page: 283 | End Page: 284 | Document Type: Conference-Paper | ID: 201551.0 |
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X-ray transient galaxies and AGN |
Authors: Grupe, Dirk | Place of Publication: Berlin | Publisher: Springer | Date of Publication (YYYY-MM-DD): 2002 | Name of Conference/Meeting: Lighthouses of the Universe : The Most Luminous Celestial Objects and Their Use for Cosmology | Title of Proceedings: Lighthouses of the Universe : The Most Luminous Celestial Objects and Their Use for Cosmology | Start Page: 292 | End Page: 294 | Title of Series: ESO Astrophysics Symposia | Document Type: Conference-Paper | ID: 14701.0 |
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