Listar Ciencias Exactas y Naturales por autor "Peterson, Bradley M."

Mostrando ítems 1-19 de 19

    • Discovery of a z = 0.65 post-starburst BAL quasar in the DES supernova fields 

      Mudd, Dale; Martini, Paul; Tie, Suk Sien; Lidman, Chris; McMahon, Richard G.; Banerji, M.; Davis, Tamara M.; Peterson, Bradley M.; Sharp, Robert G.; Seymour, Nick; Childress, Michael; Lewis, Geraint F.; Tucker, Bradley; Yuan, Fang; Abbott, Timothy M. C.; Abdalla, Filipe B.; Allam, Sahar S.; Benoit-Lévy, Aurélien; Bertin, Emmanuel; Brooks, D.; Carnero Rosell, Aurelio; Carrasco Kind, Matías; Carretero Palacios, Jorge; Costa, Luiz N. da; Desai, S.; Diehl, H. Thomas; Eifler, Tim; Finley, David A.; Flaugher, Brenna; Glazebrook, Karl; Gruen, Daniel; Gruendl, Robert A.; Gutierrez, Gaston R.; Hinton, Samuel; Honscheid, K.; James, David J.; Kuehn, Kyler; Kuropatkin, Nikolay P.; Macaulay, Edward; Maia, Marcio Antonio Geimba; Miquel, Ramon; Ogando, Ricardo L.C.; Plazas Malagón, Andrés Alejandro; Reil, Kevin; Sanchez-Alvaro, Eusebio; Santiago, Basilio Xavier; Schubnell, Michael; Sevilla Noarbe, Ignacio; Smith, Robert Christopher; Soares-Santos, Marcelle; Sobreira, Flávia; Suchyta, Eric; Swanson, Molly E. C.; Tarle, Gregory; Thomas, D.; Uddin, Syed; Walker, Alistair; Zhang, Bonnie; DES Collaboration (2017) [Artículo de periódico]
      We present the discovery of a z = 0.65 low-ionization broad absorption line (LoBAL) quasar in a post-starburst galaxy in data from the Dark Energy Survey (DES) and spectroscopy from the Australian Dark Energy Survey (OzDES). ...

    • Double-peaked profiles : ubiquitous signatures of disks in the broad emission lines of active galactic nuclei 

      Storchi-Bergmann, Thaisa; Schimoia, Jáderson da Silva; Peterson, Bradley M.; Elvis, Martin; Denney, Kelly D.; Eracleous, Michael; Nemmen, Rodrigo S. (2017) [Artículo de periódico]
      Broad (10,000 km s−1), double-peaked emission-line profiles of Balmer lines emitted by active galactic nuclei (AGN) are thought to originate in the outer parts of an accretion disk surrounding a nuclear supermassive black ...

    • Outflows in the inner kiloparsec of NGC1566 as revealed by molecular (ALMA) and ionized gas (Gemini-GMOS/IFU) kinematics 

      Slater, Roy; Nagar, Neil M.; Müller, Allan Schnorr; Storchi-Bergmann, Thaisa; Finlez, Carolina; Lena, Davide; Ramakrishnan, Venkatessh; Mundell, Carole G.; Riffel, Rogemar André; Peterson, Bradley M.; Robinson, Andrew; Orellana, Gustavo (2019) [Artículo de periódico]
      Context. Tracing nuclear inflows and outflows in active galactic nuclei (AGNs), determining the mass of gas involved in them, and their impact on the host galaxy and nuclear black hole requires 3D imaging studies of both ...

    • Short timescale monitoring of the X-ray, UV, and broad double-pead emission line of the nucleus of 1097 

      Schimoia, Jáderson da Silva; Storchi-Bergmann, Thaisa; Grupe, Dirk; Eracleous, Michael; Peterson, Bradley M.; Baldwin, Jack A.; Nemmen, Rodrigo S.; Winge, Claudia (2015) [Artículo de periódico]
      Recent studies have suggested that the short-timescale (<~ 7 days) variability of the broad (∼10,000 km s-ˡ) doublepeaked Hα profile of the LINER nucleus of NGC 1097 could be driven by a variable X-ray emission from a ...

    • A snapshot of the continuous emission of the active galactic nucleus in ngc 3783 from gamma-ray to radio wavelengths 

      Alloin, Danielle Marie; Santos-Lleo, M.; Peterson, Bradley M.; Wamsteker, W.; Altieri, B.; Brinkmann, W.; Crenshaw, Daniel Michael; George, I.M.; Clavel, J.; Glass, I.S.; Johnson, W.N.; Kriss, Gerard A.; Malkan, M.A.; Polidan, R.S.; Reichert, G.A.; Rodriguez-Pascual, P.M.; Romanishin, W.; Starr, C.H.; Stirpe, Giovanna M.; Taylor, M.; Turner, T.J.; Vega, H.J. de; Winge, Claudia; Wood, D.O.S. (1995) [Artículo de periódico]
      With the aim of better understanding the physical processes that produce the continuous emission in active galactic nuclei (AGNs), a snapshot of the overall continuous energy distribution of NGC 3783, from γ-ray to radio ...

    • Space telescope and optical reverberation mapping project : III. optical continuum emission and broadband time delays in NGC 5548 

      Fausnaugh, Michael; Denney, Kelly D.; Barth, Aaron J.; Bentz, Misty Cherie; Bottorff, Mark; Carini, Michael; Croxall, Kevin V.; De Rosa, Gisella; Goad, Michael R.; Horne, Keith; Joner, Michael D.; Kaspi, Shai; Kim, Minsun; Klimanov, S. A.; Kochanek, C.S.; Leonard, Douglas C.; Netzer, Hagai; Peterson, Bradley M.; Schnuelle, Kirsten; Sergeev, Sergey G.; Vestergaard, Marianne; Zheng, WeiKang; Zu, Ying; Anderson, Matt; Arévalo, Patricia; Bazhaw, C.; Borman, G. A.; Boroson, Todd; Brandt, W.N.; Breeveld, Alice A.; Brewer, Brendon J.; Cackett, Edward M.; Crenshaw, Daniel Michael; Dalla Bontà, Elena; De Lorenzo-Cáceres, Adriana; Dietrich, Matthias; Edelson, Rick A.; Efimova, Natalia V.; Ely, Justin C.; Evans, Phil A.; Filippenko, Alexei V.; Flatland, Kelsi; Gehrels, Neil C.; Geier, Stephan; Gelbord, Jonathan M.; Gonzalez, Luis A.; Gorjian, Varoujan; Grier, Catherine J.; Grupe, Dirk; Hall, Patrick B.; Hicks, Shannon; Horenstein, Daniel; Hutchison, T.; Im, Myungshin; Jensen, J. J.; Jones, Jeremy Bryn; Kaastra, Jelle S.; Kelly, Brandon Charles; Kennea, Jamie A.; Kim, Sang Chul; Korista, Kirk T.; Kriss, Gerard A.; Lee, Julia C.; Lira, Paulina; MacInnis, F.; Manne-Nicholas, Emily R.; Mathur, Smita; Mchardy, Ian Michael; Montouri, C.; Musso, R.; Nazarov, S. V.; Norris, Richard P.; Nousek, John A.; Okhmat, D. N.; Pancoast, Anna; Papadakis, Iossif; Parks, J. Robert; Pei, Liuyi; Pogge, Richard William; Pott, Jörg-Uwe; Rafter, Stephen E.; Rix, H.-W.; Saylor, Dicy A.; Schimoia, Jáderson da Silva; Siegel, Michael H.; Spencer, Meghin; Starkey, Donn R.; Sung, Hyun-Il; Teems, Katherine G.; Treu, Tommaso; Turner, Clay S.; Uttley, Phil; Villforth, Carolin; Weiss, Y.; Woo, Jong-Hak; Yan, H.; Young, Stuart (2016) [Artículo de periódico]
      We present ground-based optical photometric monitoring data for NGC 5548, part of an extended multiwavelength reverberation mapping campaign. The light curves have nearly daily cadence from 2014 January to July in nine ...

    • Space telescope and optical reverberation mapping project. IV. Anomalous behavior of the broad ultraviolet emission lines in NGC 5548 

      Goad, Michael R.; Korista, Kirk T.; De Rosa, Gisella; Kriss, Gerard A.; Edelson, Rick A.; Barth, Aaron J.; Ferland, Gary J.; Kochanek, C.S.; Netzer, Hagai; Peterson, Bradley M.; Bentz, Misty Cherie; Bisogni, S.; Crenshaw, Daniel Michael; Denney, Kelly D.; Ely, Justin C.; Fausnaugh, Michael; Grier, Catherine J.; Gupta, Anjali K.; Horne, Keith; Kaastra, Jelle S.; Pancoast, Anna; Pei, Liuyi; Pogge, Richard William; Skielboe, Andreas; Starkey, Donn R.; Vestergaard, Marianne; Zu, Ying; Anderson, Matt; Arévalo, Patricia; Bazhaw, C.; Borman, G. A.; Boroson, Todd; Bottorff, Mark; Brandt, W.N.; Breeveld, Alice A.; Brewer, Brendon J.; Cackett, Edward M.; Carini, Michael; Croxall, Kevin V.; Dalla Bontà, Elena; De Lorenzo-Cáceres, Adriana; Dietrich, Matthias; Efimova, Natalia V.; Evans, Phil A.; Filippenko, Alexei V.; Flatland, Kelsi; Gehrels, Neil C.; Geier, Stephan; Gelbord, Jonathan M.; Gonzalez, Luis A.; Gorjian, Varoujan; Grupe, Dirk; Hall, Patrick B.; Hicks, Shannon; Horenstein, Daniel; Hutchison, T.; Im, Myungshin; Jensen, J. J.; Joner, Michael D.; Jones, Jeremy Bryn; Kaspi, Shai; Kelly, Brandon Charles; Kennea, Jamie A.; Kim, Minsun; Kim, Sang Chul; Klimanov, S. A.; Lee, Julia C.; Leonard, Douglas C.; Lira, Paulina; MacInnis, F.; Manne-Nicholas, Emily R.; Mathur, Smita; Mchardy, Ian Michael; Montouri, C.; Musso, R.; Nazarov, S. V.; Norris, Richard P.; Nousek, John A.; Okhmat, D. N.; Papadakis, Iossif; Parks, J. Robert; Pott, Jörg-Uwe; Rafter, Stephen E.; Rix, H.-W.; Saylor, Dicy A.; Schimoia, Jáderson da Silva; Schnuelle, Kirsten; Sergeev, Sergey G.; Siegel, Michael H.; Spencer, Meghin; Sung, Hyun-Il; Teems, Katherine G.; Treu, Tommaso; Turner, Clay S.; Uttley, Phil; Villforth, Carolin; Weiss, Y.; Woo, Jong-Hak; Yan, H.; Young, Stuart; Zheng, WeiKang (2016) [Artículo de periódico]
      During an intensive Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) UV monitoring campaign of the Seyfert 1 galaxy NGC 5548 performed from 2014 February to July, the normally highly correlated far UV continuum ...

    • Spectroscopy monitoring of active galactic nuclei from CTIO. I. NGC 3227 

      Winge, Claudia; Peterson, Bradley M.; Horne, Keith; Pogge, Richard William; Pastoriza, Miriani Griselda; Storchi-Bergmann, Thaisa (1995) [Artículo de periódico]
      The results of a five-month monitoring campaign on the Seyfert 1.5 galaxy NGC 3227 are presented. Variability was detected in the continuum and in the broad emission lines. Cross correlations of the 4200 Å continuum light ...

    • Spetroscopic monitoring of active galactic nuclei from CTIO. II. IC 4329A, ESO 141-G55, Arakelian 120, and Fairall 9 

      Peterson, Bradley M.; Pastoriza, Miriani Griselda; Storchi-Bergmann, Thaisa; Winge, Claudia (1996) [Artículo de periódico]
      The results of an intensive monitoring campaign on the Seyfert 1 galaxies IC 4329A and ESO 141-G55 are presented. Variability was detected in both continuum and broad e issjon line fluxes, and the cross-correlation analysis ...

    • Spitzer space telescope measurements of dust reverberation lags in the Seyfert 1 galaxy NGC 6418 

      Vasquez, Billy; Galianni, Pasquale; Richmond, Michael; Robinson, Andrew; Axon, David J.; Horne, Keith; Almeyda, Triana; Fausnaugh, Michael; Peterson, Bradley M.; Bottorff, Mark; Gallimore, Jack F.; Elitzur, Moshe; Netzer, Hagai; Storchi-Bergmann, Thaisa; Marconi, A.; Capetti, A.; Batcheldor, Dan; Buchanan, Catherine; Stirpe, Giovanna M.; Kishimoto, Makoto; Packham, Christopher; Pérez Jiménez, Enrique; Tadhunter, Clive; Upton, John; Estrada-Carpenter, Vicente (2015) [Artículo de periódico]
      We present results from a 15 month campaign of high-cadence (∼3 days) mid-infrared Spitzer and optical (B and V) monitoring of the Seyfert 1 galaxy NGC 6418, with the objective of determining the characteristic size of the ...

    • Steps foward determination of the size and structure of the broad-line region in active galactic nuclei. V. Variability of the ultraviolet continuum and emission lines of NGC 3783 

      Reichert, G.A.; Rodriguez-Pascual, P.M.; Alloin, Danielle Marie; Clavel, J.; Crenshaw, Daniel Michael; Kriss, Gerard A.; Krolik, J.H.; Malkan, M.A.; Netzer, Hagai; Peterson, Bradley M.; Wamsteker, W.; Pastoriza, Miriani Griselda; Altamore, A.; Altieri, B.; Anderson, K.S.J.; Blackwell, J.H., Jr.; Boisson, Catherine; Brosch, N.; Carone, T.E.; Dietrich, Matthias; England, M.N.; Evans, I.N.; Filippenko, Alexei V.; Gaskell, C.M.; Good, M.; Gondhalekar, P.M.; Horne, Keith; Kazanas, D.; Kollatschny, W.; Koratkar, A.P.; Korista, Kirk T.; Macalpine, G.M.; Maoz, D.; Mazeh, Tsevi; Mccollum, B.; Miller, Hugh Richard; Oliveira, Carlos Roberto Mendes de; O'Brien, P.T.; Pelat, D.; Pérez Jiménez, Enrique; Perola, G.C.; Pogge, Richard William; Ptak, R.L.; Recondo-Gonzalez, M.C.; Rodríguez Espinosa, Jose Miguel; Rosenblat, E.I.; Asadun, A.C.; Santos-Lleo, M.; Shields, J.C.; Shrader, C.R.; Shull, John Michael; Simkin, S.M.; Sitko, M.L.; Snijders, M.A.J.; Sparke, L.S.; Stirpe, Giovanna M.; Stoner, R.E.; Storchi-Bergmann, Thaisa; Sun, W.-H.; Wang, T.; Welsh, W.F.; White, R.J.; Winge, Claudia; Zheng, W. (1994) [Artículo de periódico]
      We report on the results of intensive ultraviolet spectral monitoring of the Seyfert 1 galaxy NGC 3783. The nucleus of NGC 3783 was observed with the International Ultraviolet Explorer satellite on a regular basis for a ...

    • Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. IX. Ultraviolet observations of Fairall 9 

      Rodriguez-Pascual, P.M.; Alloin, Danielle Marie; Clavel, J.; Crenshaw, Daniel Michael; Horne, Keith; Kriss, Gerard A.; Krolik, J.H.; Malkan, M.A.; Netzer, Hagai; O'Brien, P.T.; Peterson, Bradley M.; Reichert, G.A.; Wansteker, W.; Alexander, T.; Barr, P.; Blandford, R.D.; Bregman, J.N.; Carone, T.E.; Clements, S.; Courvoisier, T.-J.; De Robertis, M.M.; Dietrich, Matthias; Dottori, Horacio Alberto; Edelson, Rick A.; Filippenko, Alexei V.; Gaskell, C.M.; Huchra, John P.; Hutchings, John B.; Kollatschny, W.; Koratkar, A.P.; Korista, Kirk T.; Laor, A.; Macalpine, G.M.; Martin, P.G.; Maoz, D.; Mccollum, B.; Morris, S.L.; Perola, G.C.; Pogge, Richard William; Ptak, R.L.; Recondo-Gonzalez, M.C.; Rodríguez Espinosa, Jose Miguel; Rokaki, E.L.; Santos-Lleo, M.; Sekiguchi, Kazuhiro; Shull, John Michael; Snijders, M.A.J.; Sparke, L.S.; Stirpe, Giovanna M.; Stoner, R.E.; Sun, W.-H.; Wagner, S.J.; Wanders, I.; Wilkes, B.J.; Winge, Claudia; Zheng, W. (1997) [Artículo de periódico]
      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 continuumÈemission-line ...

    • Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. VIII. An intensive HST, IUE, and ground-based study of NGC 5548 

      Korista, Kirk T.; Alloin, Danielle Marie; Barr, P.; Clavel, J.; Cohen, R.D.; Crenshaw, Daniel Michael; Evans, I.N.; Horne, Keith; Koratkar, A.P.; Kriss, Gerard A.; Krolik, J.H.; Malkan, M.A.; Morris, S.L.; Netzer, Hagai; O'Brien, P.T.; Peterson, Bradley M.; Reichert, G.A.; Rodriguez-Pascual, P.M.; Wamsteker, W.; Anderson, K.S.J.; Axon, David J.; Benitez, E.; Berlind, P.; Bertram, R.; Blackwell, J.H., Jr.; Bochkarev, N.G.; Boisson, Catherine; Carini, M.; Carrillo, R.; Carone, T.E.; Cheng, F.Z.; Christensem, J.A.; Chuvaev, K.K.; Dietrich, Matthias; Dokter, J.J.; Doroshenko, V.; Hayan, D. Dultzin; England, M.N.; Espey, B.R.; Filippenko, Alexei V.; Gaskell, C.M.; Goad, M.R.; Ho, Luis C.; Huchra, John P.; Jiang, Xiaojun; Kaspi, Shai; Kollatschny, W.; Laor, A.; Luminet, J.P.; Macalpine, G.M.; Mackenty, J.W.; Malkov, Yu. F.; Maoz, D.; Martin, P.G.; Matheson, T.; Mccollum, B.; Merkulova, N.; Metik, L.; Mignoli, M.; Miller, Hugh Richard; Pastoriza, Miriani Griselda; Pelat, D.; Penfold, J.; Perez, Marth; Perola, G.C.; Persaud, J.L.; Peters, J.; Pitts, R.; Pogge, Richard William; Pronik, V.I.; Ptak, R.L.; Rawley, L.; Recondo-Gonzalez, M.C.; Rodríguez Espinosa, Jose Miguel; Romanishin, W.; Sadun, A.C.; Salamanca, I.; Santos-Lleo, M.; Sekiguchi, Kazuhiro; Sergeev, S.G.; Shapovalova, A.I.; Shields, J.C.; Sharder, C.; Shull, John Michael; Silbermann, N.A.; Sitko, M.L.; Skillman, D.R.; Smith, H.A.; Smith, S.M.; Snijders, M.A.J.; Sparke, L.S.; Stirpe, Giovanna M.; Stoner, R.E.; Sun, W.-H.; Thiele, U.; Tokarz, S.; Tsvetanov, Z.I.; Turnshek, D.A.; Veilleux, Sylvain; Wagner, R.M.; Wagner, S.J.; Wanders, I.; Wang, T.; Welsh, W.F.; Weymann, R.J.; White, R.J.; Wilkes, B.J.; Wills, B.J.; Winge, Claudia; Wu, H.; Zou, Z.L. (1995) [Artículo de periódico]
      We present the data and initial results from a combined HST/IUE/ground-based spectroscopic monitoring campaign on the Seyfert I galaxy NGC 5548 that was undertaken in order to address questions that require both higher ...

    • Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. VII. Variability of the optical spectrum of NGC 5548 over 4 years 

      Peterson, Bradley M.; Berlind, P.; Bertram, R.; Bochkarev, N.G.; Bond, D.; Brotherton, Mike; Busler, J.R.; Chuvaev, K.K.; Cohen, R.D.; Dietrich, Matthias; Elvis, Martin; Filippenko, Alexei V.; Foltz, C.B.; Garnavich, P.M.; Ho, Luis C.; Horine, E.; Horne, Keith; Huchra, John P.; Kollatschny, W.; Korista, Kirk T.; Malkan, M.A.; Matheson, T.; Mignoli, M.; Morris, S.L.; Nazarova, L.; Penfold, J.; Peters, J.; Pogge, Richard William; Pronik, V.I.; Rush, B.; Sergeev, S.G.; Shapovalova, A.I.; Shields, J.C.; Stirpe, Giovanna M.; Tokarz, S.; Wagner, R.M.; Weymann, R.J.; White, R.J.; Wilkes, B.J.; Wills, Derek; Wills, Beverley J.; Winge, Claudia; Younger, P.F. (1994) [Artículo de periódico]
      We report on the results of a continuation of a large monitoring program of optical spectroscopy of the Seyfert 1 galaxy NGC 5548. The new observations presented here were obtained between 1990 December and 1992 October, ...

    • Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. VI. Variability of NGC 3783 from ground-based data 

      Stirpe, Giovanna M.; Winge, Claudia; Altieri, B.; Alloin, Danielle Marie; Aguero, E.L.; Anupama, G.C.; Ashley, R.; Bertram, R.; Calderon, J.H.; Catchpole, R.M.; Corradi, R.L.M.; Covino, E.; Dottori, Horacio Alberto; Feast, M.W.; Ghosh, K.K.; Hutton, R. Gil; Glass, I.S.; Grebel, Eva K.; Jorda, L.; Koen, C.; Laney, C.D.; Maia, Marcio Antonio Geimba; Marang, Fred; Mayya, Y.D.; Morrell, Nidia; Nakada, Y.; Pastoriza, Miriani Griselda; Pati, A.K.; Pelat, D.; Peterson, Bradley M.; Prabhu, T.P.; Roberts, G.; Sagar, R.; Salamanca, I.; Sekiguchi, Kazuhiro; Storchi-Bergmann, Thaisa; Subramaniam, A.; Villada, M.; Wagner, R.M.; Whitelock, P.A.; Winkler, Hartmut; Clavel, J.; Dietrich, Matthias; Kollatschny, W.; Perola, G.C.; Van Winckel, H.; Van Wyk, Francois; O'Brien, P.T.; Recondo-Gonzalez, M.C.; Rodriguez-Pascual, P.M.; Santos-Lleo, M. (1994) [Artículo de periódico]
      The Seyfert 1 galaxy NGC 3783 was intensely monitored in several bands between 1991 December and 1992 August. This paper presents the results from the ground-based observations in the optical and near-IR bands, which ...

    • Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. X. Variability of Fairall 9 from optical data 

      Santos-Lleo, M.; Chatzichristou, E.; Oliveira, Claudia Lucia Mendes de; Winge, Claudia; Alloin, Danielle Marie; Peterson, Bradley M.; Rodriguez-Pascual, P.M.; Stirpe, Giovanna M.; Beers, T.C.; Bragaglia, Angela; Claeskens, J.-F.; Federspiel, M.; Giannuzzo, E.; Gregorio-Hetem, J.; Mathys, G.; Salamanca, I.; Stein, P.; Stenholm, B.; Wilhelm, Ronald; Zanin, C.; Albrecht, P.; Calderon, J.H.; Caretta, C.A.; Carranza, Gustavo Jose; Costa, Roberto Dell'Aglio Dias da; Díaz, Rubén Joaquín; Dietrich, Matthias; Dottori, Horacio Alberto; Elizalde, Flavio; Goldes, G.; Ghosh, K.K.; Maia, M.A.G.; Paolantonio, S.; Rodrigues, Irapuan; Rodrigues-Ardila, Alberto; Schmitt, Henrique Roberto; Soundararajaperumal, S.; Souza, R.E. de; Willmer, C.N.A.; Zheng, W. (1997) [Artículo de periódico]
      The results of an optical monitoring campaign on the active nucleus in the luminous Seyfert 1 galaxy Fairall 9 are presented. This campaign was undertaken in parallel with ultraviolet spectroscopic monitoring with the IUE ...

    • The black hole mass of NGC 4151. II. Stellar dynamical measurement from near-infrared field spectroscopy 

      Onken, Christopher Alan; Valluri, Monica; Brown, Jonathan S.; McGregor, Peter J.; Peterson, Bradley M.; Bentz, Misty Cherie; Ferrarese, Laura; Pogge, Richard William; Vestergaard, Marianne; Storchi-Bergmann, Thaisa; Riffel, Rogemar André (2014) [Artículo de periódico]
      We present a revised measurement of themass of the central black hole (MBH ) in the Seyfert 1 galaxyNGC4151. The new stellar dynamical mass measurement is derived by applying an axisymmetric orbit-superposition code to ...

    • The Eddington ratio-dependent ‘changing look’ events in NGC 2992 

      Pereira, Muryel Guolo; Dutra, Daniel Ruschel; Grupe, Dirk; Peterson, Bradley M.; Storchi-Bergmann, Thaisa; Schimoia, Jáderson da Silva; Nemmen, Rodrigo S.; Robinson, Andrew (2021) [Artículo de periódico]
      We present an analysis of historical multiwavelength emission of the `Changing Look’ (CL) Active Galactic Nucleu (AGN) in NGC 2992, covering epochs ranging from 1978 to 2021, as well as new X-ray and optical spectra. The ...

    • The first spectroscopic dust reverberation programme on active galactic nuclei : the torus in NGC 5548 

      Landt, Hermine; Ward, Martin John; Kynoch, Daniel; Packham, Christopher; Ferland, Gary J.; Lawrence, Andy; Pott, Jörg-Uwe; Esser, Johannes; Horne, Keith; Starkey, David A.; Malhotra, Deepak; Fausnaugh, Michael; Peterson, Bradley M.; Wilman, Richard J.; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Barth, Aaron J.; Villforth, Carolin; Winkler, Hartmut (2019) [Artículo de periódico]
      We have recently initiated the first spectroscopic dust reverberation programme on active galactic nuclei in the near-infrared. Spectroscopy enables measurement of dust properties, such as flux, temperature, and covering ...