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Journal Article (71)
61.
Journal Article
397 (2), pp. 557 - 564 (2003)
1ES 1927+654: Persistent and rapid X-ray variability in an AGN with low intrinsic neutral X-ray absorption and narrow optical emission lines. Astronomy & Astrophysics 62.
Journal Article
3 (5), pp. 423 - 430 (2003)
Discovery of five Narrow-Line Seyfert 1 galaxies and implications on the NLS1 model. Chinese Journal of Astronomy and Astrophysics 63.
Journal Article
406, DOI: 10.1051/0004-6361:20030679, pp. 535 - 553 (2003)
The Hamburg/RASS Catalogue of optical identifications. Northern high-galactic latitude ROSAT Bright Source Catalogue X-ray sources. Astrophysics & Astronomy 64.
Journal Article
124 (5), pp. 2364 - 2400 (2002)
Optical and radio properties of extragalactic sources observed by the first survey and the Sloan Digital Sky Survey. The Astronomical Journal 65.
Journal Article
140 (2), pp. 239 - 264 (2002)
The ROSAT All-Sky Survey: A catalog of clusters of galaxies in a region of 1 steradian around the south Galactic pole. The Astrophysical Journal Supplement Series 66.
Journal Article
569 (1), pp. L5 - L9 (2002)
Exploratory Chandra observations of the three highest redshift quasars known. The Astrophysical Journal 67.
Journal Article
566 (1), pp. 93 - 102 (2002)
The ROSAT-ESO Flux-Limited X-ray (REFLEX) Galaxy Cluster Survey. IV. The X-ray luminosity function. The Astrophysical Journal 68.
Journal Article
123 (2), pp. 578 - 582 (2002)
The multiwavelength Quasar Survey. II. Quasars in the Coma Cluster. The Astronomical Journal 69.
Journal Article
123 (2), pp. 567 - 577 (2002)
The Sloan Digital Sky Survey Quasar Catalog. I. Early data release. The Astronomical Journal 70.
Journal Article
123 (1), pp. 485 - 548 (2002)
Sloan Digital Sky Survey: Early data release. The Astronomical Journal 71.
Journal Article
123 (1), pp. 430 - 442 (2002)
Cataclysmic variables from the Sloan Digital Sky Survey. I. The first results. The Astronomical Journal Book Chapter (1)
72.
Book Chapter
Data from the X-ray observatory ROSAT. In: Information & On-Line Data in Astronomy, pp. 27 - 35 (Eds. Egret, D.; Albrecht, M.A.). Kluwer Academic Publishers, Dordrecht, The Netherlands (1995)
Conference Paper (31)
73.
Conference Paper
Using virtual observatory techniques to search for adaptive optics suitable AGN. In: Proccedings of the Multi-Wavelength Astronomy & Virtual Observatory Workshop at ESAC, pp. 15 - 18 (Eds. Baines, D.; Osuna, P.). Multi-Wavelength Astronomy & Virtual Observatory Workshop, Madrid, Spain, December 01, 2008 - December 03, 2008. ESAC, Madrid, Spain (2009)
74.
Conference Paper
A VO study of SDSS AGNs with X-ray emission from ROSAT-PSPC pointed observations. In: Highlights of Astronomy, p. 581 - 581 (Eds. van der Hucht; A., K.). IAU XXVI General Assembly, Prague, Czech Republic, 2006-08. Cambridge University Press, Cambridge, UK (2007)
75.
Conference Paper
The GAVO cross-matcher application. In: Astronomical Data Analysis Software and Systems XV, pp. 695 - 698 (Eds. Gabriel, C.; Arviset, C.; Ponz, D.; Solano, E.). Astronomical Data Analysis Software and Systems XV, San Lorenzo de El Escorial, Spain, October 02, 2005 - October 05, 2005. Astronomical Society of the Pacific, San Francisco, CA, USA (2006)
76.
Conference Paper
VLT-SINFONI observations of Mrk 609 – a showcase for X-ray active galaxies chosen from a sample of AGN suitable for adaptive optics observations with natural guide stars. Workshop on Adaptive Optics-Assisted Integral-Field Spectroscopy, La Palma, Canary Islands, Spain, May 09, 2005 - May 11, 2005. Adaptive Optics-Assisted Integral-Field Spectroscopy, pp. 508 - 514 (2006)
77.
Conference Paper
Assembly and classification of spectral energy distributions — A new VO web service. In: Astronomical Data Analysis Software and Sytems XIV, pp. 365 - 369 (Eds. Shopbell, P.L.; Britton, M.C.; Ebert, R.). Astronomical Data Analysis Software and Sytems XIV, Pasadena, CA, USA, October 24, 2004 - October 27, 2004. Astronomical Society of the Pacific, San Francisco, CA, USA (2005)
78.
Conference Paper
The RASS-SDSS galaxy cluster survey. In: Multiwavelength mapping of galaxy formation and evolution, pp. 444 - 445 (Ed. Renzini Bender R., A.). ESO Workshop on multiwavelength mapping of galaxy formation and evolution, Venice, Italy, October 13, 2003 - October 16, 2003. Springer, Berlin [et al.] (2005)
79.
Conference Paper
Star-forming galaxies in the sloan digital sky survey - the view from Pittsburgh. In: Multiwavelength mapping of galaxy formation and evolution, pp. 320 - 325 (Ed. Renzini Bender R., A.). ESO Workshop on multiwavelength mapping of galaxy formation and evolution, Venice, Italy, October 13, 2003 - October 16, 2003. Springer, Berlin [et al.] (2005)
80.
Conference Paper
Selection of extragalactic targets for AO and VLTI observations. In: Science with Adaptive Optics, pp. 375 - 377 (Ed. Brander Kasper M., W.). ESO Workshop on Science with Adaptive Optics, Garching, Germany, September 16, 2003 - September 19, 2003. Springer, Berlin [et al.] (2005)