J
J. A. Christensen
Researcher at Colgate University
Publications - 2
Citations - 286
J. A. Christensen is an academic researcher from Colgate University. The author has contributed to research in topics: Active galactic nucleus & Galaxy. The author has an hindex of 2, co-authored 2 publications receiving 277 citations.
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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. III. Further observations of NGC 5548 at optical wavelengths
Bradley M. Peterson,Danielle Alloin,David Axon,Thomas J. Balonek,R. Bertram,Todd A. Boroson,J. A. Christensen,S. D. Clements,M. Dietrich,Martin Elvis,Alexei V. Filippenko,C. M. Gaskell,Carole A. Haswell,John P. Huchra,N. J. Jackson,Wolfram Kollatschny,Kirk T. Korista,N. J. Lame,R. J. Leacock,S. N. Lin,M. A. Malkan,A. S. Monk,M. V. Penston,Richard W. Pogge,Andrew Robinson,E. I. Rosenblatt,Joseph C. Shields,Alex G. Smith,G. M. Stirpe,Wei-Hsin Sun,T. J. Turner,R. M. Wagner,Belinda Jane Wilkes,B. J. Wills +33 more
TL;DR: The second year of an intensive ground-based spectroscopic and photometric study of variability in the bright Seyfert 1 galaxy NGC 5548 is reported in order to study the relationship between continuum and emission-line variability as discussed by the authors.