R
R. Bertram
Researcher at Ohio State University
Publications - 23
Citations - 2230
R. Bertram is an academic researcher from Ohio State University. The author has contributed to research in topics: Active galactic nucleus & Galaxy. The author has an hindex of 19, co-authored 23 publications receiving 2137 citations. Previous affiliations of R. Bertram include Lowell Observatory & University of Arizona.
Papers
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Journal ArticleDOI
Optical Continuum and Emission-Line Variability of Seyfert 1 Galaxies
Bradley M. Peterson,Ignaz Wanders,Ignaz Wanders,R. Bertram,R. Bertram,James F. Hunley,Richard W. Pogge,R. Mark Wagner,R. Mark Wagner +8 more
TL;DR: In this paper, the authors used cross-correlation analysis to derive the sizes of the broad Hβ-emitting regions based on emission-line time delays, or lags.
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. XVI. A 13 Year Study of Spectral Variability in NGC 5548
Bradley M. Peterson,Perry Berlind,R. Bertram,R. Bertram,K. Bischoff,N. G. Bochkarev,N. V. Borisov,A. N. Burenkov,A. N. Burenkov,Michael L. Calkins,L. Carrasco,V. H. Chavushyan,Ryan Chornock,Matthias Dietrich,V. T. Doroshenko,O. V. Ezhkova,Alexei V. Filippenko,Andrea M. Gilbert,John P. Huchra,Wolfram Kollatschny,Douglas C. Leonard,Douglas C. Leonard,Weidong Li,V. M. Lyuty,Yu. F. Malkov,Thomas Matheson,Thomas Matheson,N. I. Merkulova,V. P. Mikhailov,Maryam Modjaz,Maryam Modjaz,Christopher A. Onken,R. W. Pogge,V. I. Pronik,B.-C. Qian,P. Romano,Sergey G. Sergeev,E. A. Sergeeva,Alla I. Shapovalova,Alla I. Shapovalova,O. I. Spiridonova,J. Tao,Susan Tokarz,José R. Valdés,V. V. Vlasiuk,R. M. Wagner,R. M. Wagner,Belinda Jane Wilkes +47 more
TL;DR: In this paper, the authors present the final installment of an intensive 13-year study of variations of the optical continuum and broad H beta emission line in the Seyfert 1 galaxy NGC 5548.
Journal ArticleDOI
Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. XIV. Intensive Optical Spectrophotometric Observations of NGC 7469
Stefan Collier,Stefan Collier,Keith Horne,Shai Kaspi,Hagai Netzer,Bradley M. Peterson,Ignaz Wanders,Ignaz Wanders,Tal Alexander,R. Bertram,R. Bertram,Andrea Comastri,C. M. Gaskell,Yu. F. Malkov,D. Maoz,M. Mignoli,Richard W. Pogge,V. I. Pronik,S. G. Sergeev,Stephanie A. Snedden,G. M. Stirpe,N. G. Bochkarev,A. N. Burenkov,Alla I. Shapovalova,R. M. Wagner,R. M. Wagner +25 more
TL;DR: In this paper, the authors present results of an intensive 2 month campaign of ground-based spectrophotometric monitoring of the Seyfert 1 galaxy NGC 7469, with a temporal resolution 1 day.
Journal ArticleDOI
Optical Continuum and Emission-Line Variability of Seyfert 1 Galaxies
Bradley M. Peterson,Ignaz Wanders,Ignaz Wanders,R. Bertram,R. Bertram,James F. Hunley,Richard W. Pogge,R. Mark Wagner,R. Mark Wagner +8 more
TL;DR: In this paper, the authors present the light curves obtained during an eight-year program of optical spectroscopic monitoring of nine Seyfert 1 galaxies: 3C 120, Akn 120, Mrk 79, MRK 79, RMK 110, MRKS 335, MRKK 509, MRk 590, MRKN 704, MRKT 704 and MRK 817.