J
Joseph C. Shields
Researcher at University of California, Berkeley
Publications - 14
Citations - 920
Joseph C. Shields is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Active galactic nucleus & Galaxy. The author has an hindex of 9, co-authored 14 publications receiving 896 citations. Previous affiliations of Joseph C. Shields include Ohio State University.
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Journal ArticleDOI
Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. II - An intensive study of NGC 5548 at optical wavelengths
Bradley M. Peterson,Bradley M. Peterson,Thomas J. Balonek,Edwin S. Barker,Jill Bechtold,R. Bertram,R. Bertram,N. G. Bochkarev,M. J. Bolte,M. J. Bolte,D. Bond,T. A. Boroson,M. T. Carini,T. E. Carone,T. E. Carone,J. A. Christensen,S. D. Clements,Anita L. Cochran,Ross D. Cohen,David Crampton,M. Dietrich,Martin Elvis,A. Ferguson,A. Ferguson,Alexei V. Filippenko,Klaus J. Fricke,C. M. Gaskell,Jules P. Halpern,John P. Huchra,J. B. Hutchings,Wolfram Kollatschny,A. P. Koratkar,A. P. Koratkar,Kirk T. Korista,Kirk T. Korista,Julian H. Krolik,N. J. Lame,Ari Laor,R. J. Leacock,Gordon M. MacAlpine,M. A. Malkan,D. Maoz,H. R. Miller,Simon L. Morris,Hagai Netzer,C. L. M. Oliveira,Jeffrey Penfold,M. V. Penston,Enrique Pérez,Richard W. Pogge,Richard W. Pogge,M. W. Richmond,W. Romanishin,E. I. Rosenblatt,E. I. Rosenblatt,Leslie Saddlemyer,A. C. Sadun,S. R. Sawyer,Joseph C. Shields,Alla I. Shapovalova,Alex G. Smith,Horace A. Smith,Paul S. Smith,Wei-Hsin Sun,Wei-Hsin Sun,U. Thiele,T. J. Turner,Sylvain Veilleux,Sylvain Veilleux,R. M. Wagner,R. M. Wagner,Ray J. Weymann,Belinda Jane Wilkes,Beverley J. Wills,Derek Wills,P. F. Younger +75 more
TL;DR: In this paper, a large-scale ground-based optical spectroscopy and photometry of the variable Seyfert 1 galaxy NGC 5548 undertaken in support of an IUE monitoring campaign is described.
Journal ArticleDOI
Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. 5: Variability of the ultraviolet continuum and emission lines of NGC 3783
Gail A. Reichert,P. M. Rodriquez-Pascual,Danielle Alloin,J. Clavel,D. M. Crenshaw,Gerard A. Kriss,Julian H. Krolik,M. A. Malkan,Hagai Netzer,Bradley M. Peterson,W. Wamsteker,Aldo Altamore,B. Altieri,K. S. J. Anderson,J. H. Blackwell,Catherine Boisson,Noah Brosch,T. E. Carone,M. Dietrich,M. N. England,I. N. Evans,Alexei V. Filippenko,C. M. Gaskell,M. R. Goad,P. M. Gondhalekar,Keith Horne,Demos Kazanas,Wolfram Kollatschny,Anuradha Koratkar,Kirk T. Korista,Gordon M. MacAlpine,D. Maoz,Tsevi Mazeh,B. McCollum,H. R. Miller,C. Mendes de Oliveira,P. T. O'Brien,Miriani Griselda Pastoriza,D. Pelat,Enrique Pérez,G. C. Perola,Richard W. Pogge,Roger Ptak,M. C. Recondo-Gonzalez,J. M. Rodriguez-Espinoza,E. I. Rosenblatt,A. C. Sadun,M. Santos-Lleo,Joseph C. Shields,Chris Shrader,J. M. Shull,S. M. Simkin,Michael L. Sitko,M. A. J. Snijders,Linda S. Sparke,G. M. Stirpe,R. Stoner,Thaisa Storchi-Bergmann,Wei-Hsin Sun,Tinggui Wang,W. F. Welsh,R. J. White,Claudia Winge,W. Zheng +63 more
TL;DR: In this paper, the authors report on the results of intensive ultraviolet spectral monitoring of the Seyfert 1 galaxy NGC 3783, which was observed with the International Ultraviolet Explorer satellite on a regular basis for a total of 7 months, once every 4 days for the first 172 days and once every other day for the final 50 days.
Journal ArticleDOI
The type Ia supernova 1989B in NGC 3627 (M66)
L. Wells,Mark M. Phillips,Nicholas B. Suntzeff,Steve Heathcote,Mario Hamuy,M. Navarrete,M. Fernandez,W. G. Weller,R. A. Schommer,Robert P. Kirshner,Bruno Leibundgut,Bruno Leibundgut,Steven P. Willner,Reynier Peletier,Eric M. Schlegel,Eric M. Schlegel,J. Craig Wheeler,Robert P. Harkness,David J. Bell,Jaymie M. Matthews,Alexei V. Filippenko,Joseph C. Shields,Michael W. Richmond,David Jewitt,Jane X. Luu,H. D. Tran,Philip N. Appleton,E. I. Robson,J. Anthony Tyson,Puragra Guhathakurta,Jo Ann Eder,Howard E. Bond,Michael Potter,Sylvain Veilleux,Alain C. Porter,Roberta M. Humphreys,Kenneth A. Janes,T. B. Williams,Edgardo Costa,Maria Teresa Ruiz,J. T. Lee,J. H. Lutz,R. Michael Rich,P. Frank Winkler,Neil De Grasse Tyson +44 more
TL;DR: In this article, the authors report extensive optical photometry and spectroscopy of the Type Ia supernova 1989B and derive an extinction for SN 1989B of E(B-V) = 037 +/- 003 mags relative to the unobscured Type IIa SN 1980N.
Journal ArticleDOI
Variations of the ultraviolet Fe II and Balmer continuum emission in the Seyfert galaxy NGC 5548
D. Maoz,H. Netzer,H. Netzer,Bradley M. Peterson,Jill Bechtold,R. Bertram,N. G. Bochkarev,T. E. Carone,T. E. Carone,M. Dietrich,Alexei V. Filippenko,Wolfram Kollatschny,Kirk T. Korista,Alla I. Shapovalova,Joseph C. Shields,Joseph C. Shields,Paul S. Smith,U. Thiele,R. M. Wagner +18 more
TL;DR: In this article, the authors present measurements of the Balmer continuum/Fe II emission blend between 2160 and 4130 A in the Seyfert galaxy NGC 5548.
Journal ArticleDOI
Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. IV - Intensity variations of the optical emission lines of NGC 5548
M. Dietrich,Wolfram Kollatschny,Bradley M. Peterson,Jill Bechtold,R. Bertram,R. Bertram,N. G. Bochkarev,Todd A. Boroson,T. E. Carone,T. E. Carone,Martin Elvis,Alexei V. Filippenko,C. M. Gaskell,C. M. Gaskell,John P. Huchra,J. B. Hutchings,Anuradha Koratkar,Kirk T. Korista,Kirk T. Korista,N. J. Lame,Ari Laor,Gordon M. MacAlpine,M. A. Malkan,C. Mendes de Oliveira,C. Mendes de Oliveira,Hagai Netzer,J. Penfold,J. Penfold,M. V. Penston,Enrique Pérez,Richard W. Pogge,Richard W. Pogge,Michael W. Richmond,E. I. Rosenblatt,E. I. Rosenblatt,Alla I. Shapovalova,Joseph C. Shields,Joseph C. Shields,Horace A. Smith,Horace A. Smith,Paul S. Smith,Wei-Hsin Sun,Wei-Hsin Sun,U. Thiele,Sylvain Veilleux,Sylvain Veilleux,R. M. Wagner,R. M. Wagner,Belinda Jane Wilkes,B. J. Wills,Derek Wills +50 more
TL;DR: In this article, a cross-correlation analysis is applied to measure the lags between the optical emission lines and the continuum of the Seyfert galaxy NGC 5548.