G
Gordon M. MacAlpine
Researcher at University of Michigan
Publications - 40
Citations - 2078
Gordon M. MacAlpine is an academic researcher from University of Michigan. The author has contributed to research in topics: Galaxy & Crab Nebula. The author has an hindex of 21, co-authored 40 publications receiving 2015 citations. Previous affiliations of Gordon M. MacAlpine include Trinity 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. IX. Ultraviolet Observations of Fairall 9
P. M. Rodríguez-Pascual,Danielle Alloin,J. Clavel,D. M. Crenshaw,Keith Horne,Gerard A. Kriss,Julian H. Krolik,M. A. Malkan,Hagai Netzer,P. T. O'Brien,Bradley M. Peterson,Gail A. Reichert,Willem Wamsteker,Tal Alexander,P. Barr,Roger Blandford,Joel N. Bregman,T. E. Carone,S. D. Clements,Thierry J.-L. Courvoisier,M. M. De Robertis,M. Dietrich,Horacio Alberto Dottori,Rick Edelson,Alexei V. Filippenko,C. M. Gaskell,John P. Huchra,J. B. Hutchings,Wolfram Kollatschny,Anuradha Koratkar,Kirk T. Korista,Ari Laor,Gordon M. MacAlpine,Peter G. Martin,D. Maoz,B. McCollum,Simon L. Morris,G. C. Perola,Richard W. Pogge,Roger Ptak,M. C. Recondo‐Gonzalez,J. M. Rodriguez‐Espinoza,E. L. Rokaki,Maria Santos-Lleo,Kazuhiro Sekiguchi,J. M. Shull,M. A. J. Snijders,Linda S. Sparke,G. M. Stirpe,R. Stoner,Wei-Hsin Sun,Stefan Wagner,Ignaz Wanders,Belinda Jane Wilkes,Claudia Winge,W. Zheng +55 more
TL;DR: In this article, an 8-month monitoring campaign on the Seyfert 1 galaxy Fairall 9 has been conducted with the International Ultraviolet Explorer in an attempt to obtain reliable estimates of continuum-continuum and continuum-emission-line delays for a high-luminosity active galactic nucleus (AGN).
Journal ArticleDOI
Multiwavelength Observations of Short-Timescale Variability in NGC 4151. IV. Analysis of Multiwavelength Continuum Variability
Rick Edelson,Tal Alexander,D. M. Crenshaw,Shai Kaspi,M. A. Malkan,Bradley M. Peterson,R. S. Warwick,J. Clavel,Alexei V. Filippenko,Keith Horne,Kirk T. Korista,Gerard A. Kriss,Julian H. Krolik,D. Maoz,K. Nandra,P. T. O'Brien,Steve Penton,Tahir Yaqoob,P. Albrecht,Danielle Alloin,Thomas R. Ayres,Thomas J. Balonek,P. Barr,Aaron J. Barth,R. Bertram,G. E. Bromage,Michael T. Carini,T. E. Carone,FZ Cheng,K. K. Chuvaev,M. Dietrich,D DultzinHacyan,C. M. Gaskell,Ian S. Glass,Goad,S Hemar,LC Ho,John P. Huchra,J. B. Hutchings,W. N. Johnson,Demos Kazanas,Wolfram Kollatschny,A. Koratkar,O Kovo,Ari Laor,Gordon M. MacAlpine,P Magdziarz,Peter G. Martin,Thomas Matheson,B. McCollum,H. R. Miller,Simon L. Morris,V. L. Oknyanskij,Jeffrey Penfold,Enrique Pérez,G. C. Perola,G. Pike,R. W. Pogge,Roger Ptak,BC Qian,M. C. Recondo-Gonzalez,Gail A. Reichert,J. M. Rodriguez-Espinoza,P. M. Rodríguez-Pascual,E. L. Rokaki,J. Roland,A. C. Sadun,I. Salamanca,Maria Santos-Lleo,J. C. Shields,J. M. Shull,DA Smith,S. M. Smith,Maj Snijders,G. M. Stirpe,R. Stoner,Wei-Hsin Sun,M. H. Ulrich,E vanGroningen,Robert Wagner,Stephan Wagner,Ignaz Wanders,W. F. Welsh,Ray J. Weymann,Belinda Jane Wilkes,H Wu,J Wurster,SJ Xue,A. A. Zdziarski,W. Zheng,ZL Zou +90 more
TL;DR: In this article, the authors combine data from the three preceding papers in order to analyze the multi wave-band variability and spectral energy distribution of the Seyfert 1 galaxy NGC 4151 during the 1993 December monitoring campaign.
Journal ArticleDOI
Steps toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XI. Intensive Monitoring of the Ultraviolet Spectrum of NGC 7469
Ignaz Wanders,Ignaz Wanders,Bradley M. Peterson,Danielle Alloin,Thomas R. Ayres,J. Clavel,D. M. Crenshaw,Keith Horne,Gerard A. Kriss,Julian H. Krolik,M. A. Malkan,Hagai Netzer,P. T. O'Brien,Gail A. Reichert,P. M. Rodríguez-Pascual,Willem Wamsteker,Tal Alexander,Tal Alexander,K. S. J. Anderson,Erika Benítez,N. G. Bochkarev,Alexander N. Burenkov,FZ Cheng,Stefan Collier,Andrea Comastri,M. Dietrich,D. Dultzin-Hacyan,Brian R. Espey,Alexei V. Filippenko,C. M. Gaskell,Ian M. George,Ian M. George,M. R. Goad,Luis C. Ho,Shai Kaspi,Wolfram Kollatschny,Kirk T. Korista,Ari Laor,Gordon M. MacAlpine,M. Mignoli,Simon L. Morris,K. Nandra,K. Nandra,Steve Penton,Richard W. Pogge,Roger Ptak,J. M. Rodriguez‐Espinoza,Maria Santos-Lleo,Alla I. Shapovalova,J. M. Shull,Stephanie A. Snedden,Linda S. Sparke,G. M. Stirpe,Wei-Hsin Sun,T. J. Turner,T. J. Turner,M. H. Ulrich,Tinggui Wang,C. Wei,W. F. Welsh,SJ Xue,Z.-L. Zou +61 more
TL;DR: In this article, the International Ultraviolet Explorer monitored the Seyfert 1 galaxy NGC 7469 continuously in an attempt to measure time delays between the continuum and emission-line fluxes.
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.