M
M. H. Ulrich
Researcher at European Southern Observatory
Publications - 31
Citations - 1304
M. H. Ulrich is an academic researcher from European Southern Observatory. The author has contributed to research in topics: Emission spectrum & Quasar. The author has an hindex of 19, co-authored 31 publications receiving 1274 citations.
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Journal ArticleDOI
Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. I, an 8 month campaign of monitoring NGC 5548 with IUE
J. Clavel,G. A. Reichert,Danielle Alloin,D. M. Crenshaw,Gerard A. Kriss,Julian H. Krolik,M. A. Malkan,Hagai Netzer,Bradley M. Peterson,W. Wamsteker,Aldo Altamore,T. Baribaud,P. Barr,Sara C. Beck,Luc Binette,G. E. Bromage,Noah Brosch,Angeles I. Díaz,Alexei V. Filippenko,Klaus J. Fricke,C. M. Gaskell,Paolo Giommi,Ian S. Glass,P. M. Gondhalekar,R. L. Hackney,Jules P. Halpern,D. J. Hutter,S. Jörsäter,Anne L. Kinney,Wolfram Kollatschny,A. P. Koratkar,Kirk T. Korista,Ari Laor,Jean-Pierre Lasota,Elia M. Leibowitz,D. Maoz,Peter G. Martin,Tsevi Mazeh,E. J.A. Meurs,A. D. Nair,P. T. O'Brien,D. Pelat,Enrique Pérez,G. C. Perola,Roger Ptak,P. M. Rodríguez-Pascual,E. I. Rosenblatt,A. C. Sadun,M. Santos-Lleo,R. A. Shaw,Paul S. Smith,G. M. Stirpe,R. Stoner,Wei-Hsin Sun,M. H. Ulrich,E. van Groningen,Wei Zheng +56 more
TL;DR: In this paper, an 8-month campaign of monitoring NGC 5548 with IUE is described, with the goal of determining the size and structure of the broad-line region in active galactic nuclei.
Journal ArticleDOI
Detailed observations of NGC 4151 with IUE – III. Variability of the strong emission lines from 1978 February to 1980 May
M. H. Ulrich,A. Boksenberg,G. E. Bromage,J. Clavel,A. Elvius,M. V. Penston,G. C. Perola,Max Pettini,M. A. J. Snijders,E. G. Tanzi,M. Tarenghi +10 more
Journal ArticleDOI
New Results on the X-Ray Emission and Its Correlation with the Ultraviolet in NGC 4151
G. C. Perola,Luigi Piro,Aldo Altamore,Fabrizio Fiore,A. Boksenberg,M. V. Penston,M. A. J. Snijders,G. E. Bromage,J. Clavel,A. Elvius,M. H. Ulrich +10 more
Journal ArticleDOI
A month in the life of NGC 4151: velocity-delay maps of the broad-line region
M. H. Ulrich,Keith Horne +1 more
TL;DR: In this paper, the authors analyse the CIV and emission-line variability in NGC 4151 based on IUE spectra taken with nearly complete I-d sampling over a 35-d interval during 1991 November- December.
Journal Article
30 years of multi-wavelength observations of 3C 273 ?
M. Turler,S. Paltani,T. J-L. Courvoisier,Margo F. Aller,Hugh D. Aller,A. Blecha,Patrice Bouchet,Markku Lainela,I. M. McHardy,E. I. Robson,Jamie Stevens,H. Teräsranta,Merja Tornikoski,M. H. Ulrich,E. B. Waltman,W. Wamsteker,M. C. H. Wright +16 more
TL;DR: In this paper, the European Southern Observatory (ESO) proposed a method for the detection of asteroids in the Earth's magnetic field using the AAS-AAS data set, which can be found at http://aas.aanda.org