2007
CHEMICAL ABUNDANCES IN AN AGN ENVIRONMENT: X-RAY/UV CAMPAIGN ON THE MARKARIAN 279 OUTFLOW, Nahum Arav, Jack R. Gabel, Kirk T. Korrista, Jelle S. Kaastra, Gerard A. Kriss, Ehud Behar, Elisa Constantini, C. Martin Gaskell, Ari Laor, C. Nalaka Kodituwakku, Daniel Proga, Masao Sako, Jennifer E. Scott, and Katrien C. Steenbrugge
Transformations between 2MASS, SDSS and BVRI photometric systems: bridging the near infrared and optical, S. Bilir, S. Ak, S. Karaali, A. Cabrera-Lavers, T. S. Chonis, and C. M. Gaskell
Setting UBVRI Photometric Zero-Points Using Sloan Digital Sky Survey ugriz Magnitudes, Taylor S. Chonis and C. Martin Gaskell
X-Ray/Ultraviolet Observing Campaign of the Markarian 279 Active Galactic Nucleus Outflow: a close look at the absorbing/emitting gas with Chandra-LETGS, E. Costantini, J. A. Kaastra, N. Arav, G. A. Kriss, K. C. Steenbrugge, J. R. Gabel, F. Verbunt, E. Behar, C. M. Gaskell, K. T. Korista, D. Proga, J. Kim Quijano, J. E. Scott, E. S. Klimek, and C. H. Hedrick
HUBBLE SPACE TELESCOPE ULTRAVIOLET SPECTROSCOPY OF 14 LOW-REDSHIFT QUASARS, Rajib Ganguly, Michael S. Brotherton, Nahum Arav, Sara R. Heap, Lutz Wisotzki, Thomas L. Aldcroft, Danielle Alloin, Ehud Behar, Gabriela Canalizo, D. Michael Crenshaw, Martijn De Kool, Kenneth Chambers, Gerald Cecil, Eleni Chatzichristou, John Everett, Jack Gabel, C. Martin Gaskell, Emmanuel Galliano, Richard F. Green, Patrick B. Hall, Dean C. Hines, Vesa T. Junkkarinen, Jelle S. Kaastra, Mary Elizabeth Kaiser, Demosthenes Kazanas, Arieh Konigl, Kirk T. Korista, Gerard A. Kriss, Ari Laor, Karen M. Leighly, Smita Mathur, Patrick Ogle, Daniel Proga, Bassem Sabra, Ran Sivron, Stephanie Snedden, Randal Telfer, and Marianne Vestergaard
DISCOVERY OF POLARIZATION REVERBERATION IN NGC 4151, C. M. Gaskell, Rene W. Goosmann, Nelly I. Merkulova, Nikolay M. Shakhovskoy, and Masatoshi Shoji
AGN REDDENING AND ULTRAVIOLET EXTINCTION CURVES FROM HUBBLE SPACE TELESCOPE SPECTRA, C. Martin Gaskell and A. J. Benker
NGC 5548: THE AGN ENERGY BUDGET PROBLEM AND THE GEOMETRY OF THE BROAD-LINE REGION AND TORUS, C. Martin Gaskell, Elizabeth S. Klimek, and Ludmila S. Nazarova
Modeling optical and UV polarization of AGNsI. Imprints of individual scattering regions, R. W. Goosmann and C. M. Gaskell
AGN polarization modeling with STOKES, R. W. Goosmann and C. Martin Gaskell
Modeling the Polarization of Dusty Scattering Cones in Active Galactic Nuclei, René W. Goosmann, C. M. Gaskell, and Masatoshi Shoji
Modeling optical and UV polarization of AGNs I. Imprints of individual scattering regions, René W. Goosmann and C. Martin Gaskell
THE CASE FOR OPTICALLY THICK HIGH-VELOCITY BROAD-LINE REGION GAS IN ACTIVE GALACTIC NUCLEI, Stephanie A. Snedden and C. Martin Gaskell
2006
X-Ray/Ultraviolet Observing Campaign of the Markarian 279 Active Galactic Nucleus Outflow: a close look at the absorbing/emitting gas with Chandra-LETGS, E. Constantini, J.S. Kaastra, N. Arav, G.A. Kriss, K.C. Steenbrugge, J.R. Gabel, F. Verbunt, E. Behar, C. Martin Gaskell, K.T. Korista, D. Proga, J. Kim Quijano, J.E. Scott, E.S. Klimek, and C.H. Hedrick
Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars, Rajib Ganguly, Michael S. Brotherton, Nahum Arav, Sara R. Heap, Lutz Wisotzki, Thomas L. Aldcroft, Danielle Alloin, Ehud Behar, Gabriela Canalizo, D. Michael Crenshaw, Martijn de Kool, Kenneth Chambers, Gerald Cecil, Eleni Chatzichristou, John Everett, Jack Gabel, C.M. Gaskell, Emmanuel Galliano, Richard F. Green, Patrick B. Hall, Dean C. Hines, Vesa T. Junkkarinen, Jelle S. Kaastra, Mary Elizabeth Kaiser, Demosthenes Kazanas, Arieh Konigl, Kirk T. Korista, Gerard A. Kriss, Ari Laor, Karen M. Leighly, Smita Mathur, Patrick Ogle, Daniel Ogle, Bassem Sabra, Ran Sivron, Stephanie Snedden, Randal Telfer, and Marianne Vestergaard
Optical and X-ray Variability of AGNs, C. Martin Gaskell
The Origin of Wavelength-Dependent Continuum Delays in AGNs – a New Model, C. Martin Gaskell
Optical Variability of the Three Brightest Nearby Quasars, C. Martin Gaskell, Andrew J. Benker, Jeffrey S. Campbell, Thomas A. George, Cecilia H. Hedrick, Mary E. Hiller, Elizabeth S. Klimek, Joseph P. Leonard, Shoji Masatoshi, Bradley W. Peterson, Kelly S. Peterson, and Kelly M. Sanders
Evidence for Two Kinematically Distinct Broad Emission Line Producing Regions in Active Galactic Nuclei, Stephanie A. Snedden and C. Martin Gaskell
2005
X-RAY/ULTRAVIOLET OBSERVING CAMPAIGN OF THE MARKARIAN 279 ACTIVE GALACTIC NUCLEUS OUTFLOW: A GLOBAL-FITTING ANALYSIS OF THE ULTRAVIOLET ABSORPTION, Jack R. Gabel, Nahum Arav, Jelle S. Kaastra, Gerard A. Kriss, Ehud Behar, Elisa Costantini, C. Martin Gaskell, Kirk T. Korista, Ari Laor, Frits Paerels, Daniel Proga, Jessica Kim Quijano, Masao Sako, Jennifer E. Scott, and Katrien C. Steenbrugge
Modelling continuum optical and ultraviolet polarization of active galactic nuclei, René W. Goosmann and C. Martin Gaskell
2004
LOGNORMAL X-RAY FLUX VARIATIONS IN AN EXTREME NARROW-LINE SEYFERT 1 GALAXY, C. Martin Gaskell
THE NUCLEAR REDDENING CURVE FOR ACTIVE GALACTIC NUCLEI AND THE SHAPE OF THE INFRARED TO X-RAY SPECTRAL ENERGY DISTRIBUTION, C. Martin Gaskell, René W. Goosmann, Robert R. J. Antonucci, and David H. Whysong
OPTICAL VARIABILITY OF NARROW-LINE SEYFERT 1 GALAXIES, Elizabeth S. Klimek, C. Martin Gaskell, and Cecilia H. Hedrick
Different Velocity Dependences of Physical Conditions of High- and Low-Ionization Lines in Broad-Line Regions, Stephanie A. Snedden and C. Martin Gaskell
The Case for an Optically-Thick High-Velocity Broad-Line Region, Stephanie A. Snedden and C. Martin Gaskell
2001
A spectroscopic and photometric study of short-timescale variability in NGC 5548, M. Dietrich, C. F. Bender, D. J. Bergmann, T. E. Bills, N. G. Bochkarev, A. Burenkov, C. Martin Gaskell, D. D. Gutzmer, R. Grove, M. E. Hiller, J. P. Huchra, E. S. Klimek, C. Lund, N. Merkulova, S. Pebley, M. A. Poulsen, V. I. Pronik, S. G. Sergeev, E. A. Sergeeva, A. I. Shapovalova, V. V. Vlasyuk, and B. Wilkes
MULTIWAVELENGTH MONITORING OF THE NARROW-LINE SEYFERT 1 GALAXY ARAKELIAN 564. III. OPTICAL OBSERVATIONS AND THE OPTICAL--UV--X-RAY CONNECTION, O. Shemmer, P. Romano, R. Bertram, W. Brinkmann, S. Collier, K. A. Crowley, E. Detsis, A. V. Filippenko, C. Martin Gaskell, T. A. George, M. Gliozzi, M. E. Hiller, T. L. Jewell, S. Kaspi, E. S. Klimek, M. H. Lannon, W D. Li, P. Martini, S. Mathur, H. Negoro, H. Netzer, I. Papadakis, I. Papamastorakis, B. M. Peterson, B. W. Peterson, R. W. Pogge, V. I. Pronik, K. S. Rumstay, S. G. Sergeev, G. M. Stirpe, C. J. Taylor, R. R. Treffers, T. J. Turner, P. Uttley, M. Vestergaard, K. von Braun, R. M. Wagner, and Z. Zheng
2000
A Look At What Is (And Isn't) Known About Quasar Broad Line Regions And How Narrow-Line Seyfert 1s Fit In, C. Martin Gaskell
1999
THE EFFECT OF ABUNDANCE VARIATIONS ON ESTIMATES OF THE DENSITIES OF BROAD-LINE REGION CLOUDS IN QUASARS, Stephanie A. Snedden and C. Martin Gaskell
1998
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, S.J. Collier, Keith Horne, S. Kaspi, H. Netzer, B.M. Peterson, I. Wanders, T. Alexander, R. Bertram, A. Comastri, C. Martin Gaskell, Yu. F. Malkov, D. Maoz, M. Mignoli, R.W. Pogge, V.I. Pronik, S.G. Sergeev, S. Snedden, G.M. Stirpe, N.G. Bochkarev, A.N. Burenkov, A.I. Shapovalova, and R.M. Wagner
STEPS TOWARD DETERMINATION OF THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI. XII. GROUND-BASED MONITORING OF 3C 390.3, M. Dietrich, B.M. Peterson, P. Albrecht, M. Altmann, A.J. Barth, P.J. Bennie, R. Bertram, N.G. Bochkarev, H. Bock, J.M. Braun, A. Burenkov, S. Collier, L.-Z. Fang, O.P. Francis, A.V. Filippenko, C.B. Foltz, W. Gassler, C.M. Gaskell, M. Geffert, K.K. Ghosh, R.W. Hilditch, R.K. Honeycutt, K. Horne, J.P. Huchra, S. Kaspi, M. Kummel, K.M. Leighly, D.C. Leonard, Yu. F. Malkov, V. Mikhailov, H.R. Miller, A.C. Morrill, J. Noble, P.T. O'Brien, T.D. Oswalt, S.P. Pebley, M. Pfeiffer, V.I. Pronik, B.-C. Qian, J.W. Robertson, A. Robinson, K.S. Rumstay, J. Schmoll, S.G. Sergeev, E.A. Sergeeva, A.I. Shapovalova, D.R. Skillman, S.A. Snedden, S. Soundararajaperumal, G.M. Stirpe, J. Tao, G.W. Turner, R.M. Wagner, S.J. Wagner, J.Y. Wei, H. Wu, W. Zheng, and Z.L. Zhou
STEPS TOWARD DETERMINATION OF THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI. XIII. ULTRAVIOLET OBSERVATIONS OF THE BROAD-LINE RADIO GALAXY 3C 390.3, P. T. O'Brien, M. Dietrich, K. Leighly, D. Alloin, J. Clavel, D. M. Crenshaw, K. Horne, G. A. Criss, J. H. Krolik, M. A. Malkan, H. Netzer, B. M. Peterson, G. A. Reichert, P. M. Rodriguez-Pascual, W. Wamsteker, K. S. J. Anderson, N. G. Bochkarev, F.-Z. Cheng, A. V. Filippenko, C. M. Gaskell, I. M. George, M. R. Goad, L. C. Ho, S. Kaspi, W. Kollatschny, K. T. Korista, G. MacAlpine, D. Marlow, P. G. Martin, S. L. Morris, R. W. Pogge, B. C. Qian, M. C. Recondo-Gonzalez, J. M. Rodriguez Espinosa, M. Santos-Lleo, A. I. Shapovalova, J. M. Shull, G. M. Stirpe, W.-H. Sun, T. J. Turner, R. Vio, S. Wagner, I. Wanders, K. A. Wills, H. Wu, S. J. Xue, and Z.-L. Zou
1997
STEPS TOWARD DETERMINATION OF THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI. IX. ULTRAVIOLET OBSERVATIONS OF FAIRALL, P.M. Rodriguez-Pascual, D. Allion, J. Clavel, D.M. Crenshaw, K. Horne, G.A. Kriss, J.H. Krolik, M.A. Malkan, H. Netzer, P.T. O'Brien, B.M. Peterson, G.A. Reichert, W. Wamsteker, T. Alexander, P. Barr, R.D. Blandford, J.N. Bergman, T.E. Carone, S. Clements, T.-J. Courvoisier, M.M. De Robertis, M. Dietrich, H. Dottori, R.A. Edelson, A.V. Filippenko, C.M. Gaskell, J. P. Huchra, J.B. Hutchings, W. Kollatschny, A.P. Koratkar, K.T. Korista, A. Laor, G.M. MacAlpine, P.G. Martin, D. Maoz, B. McCollum, S.L. Morris, G.C. Perola, R.W. Pogge, R.L. Ptak, M.C. Recondo-Gonzalez, J.M. Rodriguez-Espinoza, E.L. Rokaki, M. Santos-Lleo, K. Sekiguchi, J.M. Schull, M.A.J. Snuders, L.S. Sparke, G.M. Stirpe, R.E. Stoner, W.-H. Sun, S.J. Wagner, I. Wanders, B.J. Wilkes, C. Winge, and W. Zheng
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, I. Wanders, B.M. Peterson, D. Alloin, T.R. Ayres, J. Clavel, D.M. Crenshaw, K. Horne, G.A. Kriss, J.H. Krolik, M.A. Malkan, H. Netzer, P.T. O'Brien, G.A. Reichert, P.M. Rodriguez-Pascual, W. Wamsteker, T. Alexander, K.S.J. Anderson, E. Benitez, N.G. Bochkarev, A.N. Burenkov, F.-Z. Cheng, S.J. Collier, A. Comastri, M. Dietrich, D. Dultzin-Hacyan, B.R. Espey, A.V. Filippenko, C.M. Gaskell, I.M. George, M.R. Goad, L.C. Ho, S. Kaspi, W. Kollatschny, K.T. Korista, A. Laor, G.M. MacAlpine, M. Mignoli, S.L. Morris, K. Nandra, S. Penton, R.W. Pogge, R.L. Ptak, J.M. Rodriguez-Espinoza, M. Santos-Lleo, A.I. Shapovalova, J.M. Shull, S.A. Snedden, L.S. Sparke, G.M. Stirpe, W.-H. Sun, T.J. Turner, M.-H. Ulrich, T.-G. Wang, C. Wei, W.F. Welsh, S.-J. Xue, and Z.-L. Zhou
1996
Evidence for Binary Orbital Motion of a Quasar Broad-Line Region, C. M. Gaskell
Supermassive Binaries and Extragalactic Jets, C. Martin Gaskell