S
Steve Penton
Researcher at University of Colorado Boulder
Publications - 31
Citations - 1438
Steve Penton is an academic researcher from University of Colorado Boulder. The author has contributed to research in topics: Cosmic Origins Spectrograph & Galaxy. The author has an hindex of 13, co-authored 31 publications receiving 1402 citations.
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Journal ArticleDOI
Multiwavelength Observations of a Dramatic High-Energy Flare in the Blazar 3C 279
Ann E. Wehrle,Elena Pian,C. M. Urry,L. Maraschi,I. M. McHardy,Anthony Lawson,G. Ghisellini,R. C. Hartman,Greg Madejski,F. Makino,Alan P. Marscher,Stefan Wagner,James R. Webb,James R. Webb,G. Aldering,Margo F. Aller,Hugh D. Aller,Dana E. Backman,Thomas J. Balonek,P. Boltwood,Jerry T. Bonnell,J. Caplinger,Annalisa Celotti,Werner Collmar,J. Dalton,A. Drucker,Renato Falomo,C. E. Fichtel,Wolfram Freudling,Walter Kieran Gear,N. Gonzales,Patrick B. Hall,H. Inoue,W. N. Johnson,Demos Kazanas,Mark R. Kidger,Tsuneo Kii,R. I. Kollgaard,Yoji Kondo,James D. Kurfess,Yiing Lin,B. McCollum,K. McNaron-Brown,F. Nagase,A. D. Nair,Steve Penton,Joseph E. Pesce,Joseph E. Pesce,Martin Pohl,C. M. Raiteri,Matthew J. Renda,E. I. Robson,Rita M. Sambruna,Rita M. Sambruna,A. F. Schirmer,Chris Shrader,Marek Sikora,A. Sillanpää,Paul S. Smith,Jamie Stevens,John T. Stocke,L. O. Takalo,H. Teräsranta,D. J. Thompson,R. Thompson,Merja Tornikoski,G. Tosti,Aldo Treves,P. Turcotte,Stephen C. Unwin,E. Valtaoja,M. Villata,W. Xu,A. Yamashita,A. C. Zook +74 more
TL;DR: The blazar 3C 279, one of the brightest identified extragalactic objects in the γ-ray sky, underwent a large (factor of ~10 in amplitude) flare in γ rays toward the end of a 3 week pointing by Compton Gamma Ray Observatory (CGRO), in 1996 January-February.
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.
Steps toward determination of the size and structure of the broad-line region in active galactic nuclei .11. Intensive monitoring of the ultraviolet spectrum of NGC 7469
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,H. Netzer,P. T. O'Brien,Gail A. Reichert,P. M. Rodríguez-Pascual,Willem Wamsteker,Tal Alexander,Ksj Anderson,Erika Benítez,N. G. Bochkarev,Alexander N. Burenkov,FZ Cheng,Stefan Collier,Andrea Comastri,M. Dietrich,D DultzinHacyan,Brian R. Espey,Alexei V. Filippenko,C. M. Gaskell,Ian M. George,Goad,Luis C. Ho,Shai Kaspi,Wolfram Kollatschny,Kirk T. Korista,Ari Laor,Gordon M. MacAlpine,M. Mignoli,Simon L. Morris,K. Nandra,Steve Penton,R. 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,M. H. Ulrich,Tinggui Wang,C. Wei,W. F. Welsh,SJ Xue,Z.-L. Zou +56 more
TL;DR: In this paper, 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
Multiwavelength monitoring of the BL Lacertae Object PKS 2155-304 in 1994 May. III. Probing the inner jet through multiwavelength correlations
C. Megan Urry,Aldo Treves,Aldo Treves,Laura Maraschi,Herman L. Marshall,Tsuneo Kii,Greg Madejski,Steve Penton,Joseph E. Pesce,Elena Pian,Annalisa Celotti,R. Fujimoto,F. Makino,Chiko Otani,R. M. Sambruna,K. Sasaki,J. M. Shull,Paul S. Smith,Tadayuki Takahashi,Makoto Tashiro +19 more
TL;DR: In this paper, the International Ultraviolet Explorer (IUE) was used to observe the BL Lac object PKS 2155-304 for 10 days and 2 days with ASCA and with ground-based radio, infrared, and optical telescopes.