• Evidence for a precessing accretion disk in the nucleus of NGC 1097 

      Storchi-Bergmann, Thaisa; Eracleous, Michael; Ruiz, Maria Teresa; Livio, Mario; Wilson, Andrew S.; Filippenko, Alexei V. (1997) [Artigo de periódico]
      We present new spectroscopic observations of the LINER (and now Seyfert 1) nucleus of NGC 1097, and discuss the evolution of its broad, double-peaked Balmer lines. When originally discovered in 1991, the red peak of the ...
    • Evidence of a starburst within 9 parsecs of the active nucleus of NGC 1097 

      Storchi-Bergmann, Thaisa; Nemmen, Rodrigo S.; Spinelli, Patrícia Figueiro; Eracleous, Michael; Wilson, Andrew S.; Filippenko, Alexei V.; Livio, Mario (2005) [Artigo de periódico]
      We report evidence of a recent burst of star formation located within 9 pc of the active nucleus of NGC 1097. The observational signatures of the starburst include UV absorption lines and continuum emission from young stars ...
    • Evolution of the nuclear accretion disk emission in NGC 1097 : getting closer to the black hole 

      Storchi-Bergmann, Thaisa; Nemmen, Rodrigo S.; Eracleous, Michael; Halpern, Jules P.; Wilson, Andrew S.; Filippenko, Alexei V.; Ruiz, Maria Teresa; Smith, Robert Christopher; Nagar, Neil M. (2003) [Artigo de periódico]
      We study the evolution of the broad, double-peaked H emission-line profile of the LINER/Seyfert 1 nucleus of NGC 1097, using 24 spectra obtained over a time span of 11 years—from 1991 November through 2002 October. While ...
    • 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) [Artigo 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) [Artigo 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 ...
    • 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) [Artigo 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) [Artigo 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) [Artigo 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) [Artigo 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, ...
    • The variability of the double-peaked balmer lines in the active nucleus of NGC 1097 

      Storchi-Bergmann, Thaisa; Livio, Mario; Wilson, Andrew S.; Filippenko, Alexei V.; Halpen, Jules P. (1995) [Artigo de periódico]
      We present spectroscopic observations of the nucleus of the Seyfert/low-ionization nuclear emission-line region galaxy NGC 1097 spanning the period 1991-1994. The goal was to monitor anticipated variations of the broad, ...