Now showing items 1-11 of 11

    • Active galactic nuclei at z similar to 1.5-I. Spectral energy distribution and accretion discs 

      Capellupo, D. M.; Netzer, H.; Lira Teillery, Paulina; Trakhtenbrot, B.; Mejía Restrepo, Julián (Oxford University Press, 2015)
      The physics of active super massive black holes (BHs) is governed by their mass (MBH), spin (a(*)) , and accretion rate ((M) over dot). This work is the first in a series of papers with the aim of testing how these parameters ...
    • Active galactic nuclei at z ˜ 1.5 - I. Spectral energy distribution and accretion discs 

      Capellupo, D. M.; Netzer, H.; Lira Teillery, Paulina; Trakhtenbrot, B.; Mejía-Restrepo, Julian (Royal Astronomical Society, 2015)
      The physics of active super massive black holes (BHs) is governed by their mass (MBH), spin (a∗), and accretion rate (M˙ ). This work is the first in a series of papers with the aim of testing how these parameters determine ...
    • Active galactic nuclei at z ∼ 1.5 – II. Black hole mass estimation by means of broad emission lines 

      Mejía Restrepo, Julián; Trakhtenbrot, Benny; Lira Teillery, Paulina; Netzer, H.; Capellupo, Daniel (Oxford University Press, 2016)
      This is the second in a series of papers aiming to test how the mass (M-BH), accretion rate (M) over dot and spin (a(*)) of supermassive black holes (SMBHs) determine the observed properties of type I active galactic nuclei ...
    • Can we improve CIV-based single-epoch black hole mass estimations? 

      Mejía-Restrepo, J. E.; Trakhtenbrot, B.; Lira, P.; Netzer, H. (Oxford University Press, 2018)
      © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. In large optical surveys at high redshifts (z > 2), the C IV λ1549 broad emission line is the most practical ...
    • Evidence for Periodicity in 43 Year-Long Monitoring of NGC 5548 

      Bon, Edi; Zucker, S.; Netzer, H.; Marziani, Paola; Bon, N.; Jovanovic, Predrag; Shapovalova, A. I.; Komossa, S.; Gaskell, C. M.; Popović, Ljiljana; Britzen, Stefan; Chavushyan, V. H.; Burenkov, A.; Sergeev, S. G.; La Mura, Giovanni; Valdés, J. R.; Stalevski, Marko (IOP, 2016)
      We present an analysis of 43 years (1972 to 2015) of spectroscopic observations of the Seyfert 1 galaxy NGC 5548. This includes 12 years of new unpublished observations (2003 to 2015). We compiled about 1600 H beta spectra ...
    • Space telescope and optical reverberation mapping project. I. Ultraviolet observations of the seyfert 1 galaxy NGC 5548 with the cosmic origins spectrograph on hubble space telescope 

      Rosa, G. de; Peterson, B. M.; Ely, J.; Kriss, G. A.; Crenshaw, D. M.; Horne, Keith; Korista, K. T.; Netzer, H.; Pogge, R. W.; Arévalo, P.; Barth, A. J.; Bentz, M. C.; Brandt, W. N.; Breeveld, A. A.; Brewer, B. J.; Dalla Bontà, E.; Lorenzo Cáceres, A. de; Denney, K. D.; Dietrich, M.; Edelson, R.; Evans, P. A.; Fausnaugh, M. M.; Gehrels, N.; Gelbord, J. M.; Goad, M. R.; Grier, C. J.; Grupe, D.; Hall, P. B.; Kaastra, J.; Kelly, B. C.; Kennea, J. A.; Kochanek, C. S.; Lira Teillery, Paulina; Mathur, S.; McHardy, I. M.; Nousek, J. A.; Pancoast, A.; Papadakis, I.; Pei, L.; Schimoia, J. S.; Siegel, M.; Starkey, D.; Treu, T.; Uttley, P.; Vaughan, S.; Vestergaard, M.; Villforth, C.; Yan, H.; Young, S.; Zu, Y. (IOP Publishing, 2015)
      We describe the first results from a six-month long reverberation-mapping experiment in the ultraviolet based on 171 observations of the Seyfert 1 galaxy NGC 5548 with the Cosmic Origins Spectrograph on the Hubble Space ...
    • Space telescope and optical reverberation mapping project. II. Swift and hst reverberation mapping of the accretion disk of NGC 5548 

      Edelson, R.; Gelbord, J. M.; Horne, K.; McHardy, I. M.; Peterson, B. M.; Arévalo, P.; Breeveld, A. A.; Rosa, G. de; Evans, P. A.; Goad, M. R.; Kriss, G. A.; Brandt, W.N.; Gehrels, N.; Grupe, D.; Kennea, J. A.; Kochanek, C. S.; Nousek, J. A.; Papadakis, I.; Siegel, M.; Starkey, D.; Uttley, P.; Vaughan, S.; Young, S.; Barth, A. J.; Bentz, M. C.; Brewer, B. J.; Crenshaw, D. M.; Dalla Bontà, E.; Lorenzo Cáceres, A. de; Denney, K. D.; Dietrich, M.; Ely, J.; Fausnaugh, M. M.; Grier, C. J.; Hall, P. B.; Kaastra, J.; Kelly, B. C.; Korista, K. T.; Lira Teillery, Paulina; Mathur, S.; Netzer, H.; Pancoast, A.; Pei, L.; Pogge, R. W.; Schimoia, J. S.; Treu, T.; Vestergaard, M.; Villforth, C.; Yan, H.; Zu, Y. (IOP Publishing, 2015)
      Recent intensive Swift monitoring of the Seyfert 1 galaxy NGC 5548 yielded 282 usable epochs over 125 days across six UV/optical bands and the X-rays. This is the densest extended active galactic nucleus (AGN) UV/optical ...
    • Space telescope and optical reverberation mapping project. III optical continuum emission and broadband time delays in ngc 5548 

      Fausnaugh, M. M.; Denney, K. D.; Barth, A. J.; Bentz, M. C.; Bottorff, M. C.; Carini, M. T.; Croxall, K. V.; Rosa, G. de; Goad, M. R.; Horne, Keith; Joner, M. D.; Kaspi, S.; Kim, M.; Klimanov, S. A.; Kochanek, C. S.; Leonard, D. C.; Netzer, H.; Peterson, B. M.; Schnulle, K.; Sergeev, S. G.; Vestergaard, M.; Zheng, W.-K; Zu, Y.; Anderson, M. D.; Arévalo, P.; Bazhaw, C.; Borman, G. A.; Boroson, T. A.; Brandt, W. N.; Breeveld, A. A.; Brewer, B. J.; Cackett, E. M.; Crenshaw, D. M.; Dalla Bonta, E.; Lorenzo Cáceres, A. de; Dietrich, M.; Edelson, R.; Efimova, N. V.; Ely, J.; Evans, P. A.; Filippenko, A. V.; Flatland, K.; Gehrels, N.; Geier, S.; Gelbord, J. M.; González, L.; Gorjian, V.; Grier, C. J.; Grupe, D.; Hall, P. B.; Hicks, S.; Horenstein, D.; Hutchison, T.; Im, M.; Jensen, J. J.; Jones, J.; Kaastra, J.; Kelly, B. C.; Kennea, J. A.; Kim, S. C.; Korista, K. T.; Kriss, G. A.; Lee, J. C.; Lira Teillery, Paulina; MacInnis, F.; Manne-Nicholas, E. R.; McHardy, I. M.; Montouri, C.; Musso, R.; Nazarov, S. V.; Norris, R. P.; Nousek, J. A.; Okhmat, D. N.; Pancoast, A.; Papadakis, I.; Parks, J. R.; Pei, L.; Pogge, R. W.; Pott, J.-U; Rafter, S. E.; Rix, H. -W.; Saylor, D. A.; Schimoia, J. S.; Siegel, M.; Spencer, M.; Starkey, D.; Sung, H. -I.; Teems, K. G.; Treu, T.; Turner, C. S.; Uttley, P.; Villforth, C.; Weiss, Y.; Woo, J. -H; Yan, H.; Young, S. (IOP Publisihing, 2016)
      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 ...
    • Space telescope and optical reverberation mapping project. iv. anomalous behavior of the broad ultraviolet emission lines in ngc 5548 

      Goad, M. R.; Korista, K. T.; De Rosa, G.; Kriss, G. A.; Edelson, R.; Barth, A. J.; Ferland, G. J.; Kochanek, C. S.; Netzer, H.; Peterson, B. M.; Bentz, M. C.; Bisogni, S.; Crenshaw, D. M.; Denney, K. D.; Ely, J.; Fausnaugh, M. M.; Grier, C. J; Gupta, A.; Horne, K. D.; Kaastra, J.; Pancoast, A.; Pei, L.; Pogge, R. W.; Skielboe, A.; Kaastra, J.; Pancoast, A.; Pei, L.; Pogge, R. W.; Skielboe, A.; Starkey, D.; Vestergaard, M.; Zu, Y.; Anderson, M. D.; Arévalo, P.; Bazhaw, C.; Borman, G. A.; Boroson, T. A.; Bottorff, M. C.; Brandt, W. N.; Breeveld, A. A.; Brewer, B. J.; Cackett, E. M.; Carini, M. T.; Croxall, K. V.; Dalla Bonta, E.; De Lorenzo Cáceres, A.; Dietrich, M.; Efimova, N. V.; Evans, P. A.; Filippenko, A. V.; Flatland, K.; Gehrels, N.; Geier, S.; Gelbord, J. M.; González, L.; Gorjian, V.; Grupe, D.; Hall, P. B.; Hicks, S.; Horenstein, D.; Hutchison, T.; Im, M.; Jensen, J. J.; Joner, M. D.; Jones, J.; Kaspi, S.; Kelly, B. C.; Kennea, J. A.; Kim, M.; Kim, S. C.; Klimanov, S. A.; Lee, J. C.; Leonard, D. C.; Lira Teillery, Paulina; MacInnis, F.; Manne-Nicholas, E. R.; Mathur, S.; McHardy, I. M.; Montouri, C.; Musso, R.; Nazarov, S. V.; Norris, R. P.; Nousek, J. A.; Okhmat, D. N.; Papadakis, I.; Parks, J. R.; Pott, J. U.; Rafter, S. E.; Rix, H. W.; Saylor, D. A.; Schimoia, J. S; Schnuelle, K.; Sergeev, S. G.; Siegel, M.; Spencer, M.; Sung, H. I.; Teems, K. G.; Treu, T.; Turner, C. S.; Uttley, P.; Villforth, C.; Weiss, Y.; Woo, J. H.; Yan, H.; Young, S.; Zheng, W. K. (IOP Publishing, 2016)
      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 ...
    • Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548 

      Pei, L.; Fausnaugh, M. M.; Barth, A. J.; Peterson, B. M.; Bentz, M. C.; Rosa, G. de; Denney, K. D.; Goad, M. R.; Kochanek, C. S.; Korista, K. T.; Kriss, G. A.; Pogge, R. W.; Bennert, V. N.; Brotherton, M.; Clubb, K. I.; Dalla Bontà, E.; Filippenko, A. V.; Greene, J. E.; Grier, C. J.; Vestergaard, M.; Zheng, W.-K; Adams, Scott M.; Beatty, Thomas G.; Bigley, A.; Brown, Jacob E.; Brown, Jonathan S.; Canalizo, G.; Comerford, J. M.; Coker, Carl T.; Corsini, E. M.; Croft, S.; Croxall, K. V.; Deason, A. J.; Eracleous, Michael; Fox, O. D.; Gates, E. L.; Henderson, C. B.; Holmbeck, E.; Holoien, T. W.-S; Jensen, J. J.; Johnson, C. A.; Kelly, P. L.; Kim, S.; King, A.; Lau, M. W.; Li, Miao; Lochhaas, Cassandra; Ma, Zhiyuan; Manne-Nicholas, E. R.; Mauerhan, J. C.; Malkan, M. A.; McGurk, R.; Morelli, L.; Mosquera, Ana; Dale Mudd, Dale; Muller Sánchez, F.; Nguyen, M. L.; Ochner, P.; Ou-Yang, B.; Pancoast, A.; Penny, Matthew T.; Pizzella, A.; Poleski, Radoslaw; Runnoe, Jessie; Scott, B.; Schimoia, Jaderson S.; Shappee, B. J.; Shivvers, I.; Simonian, Gregory V.; Siviero, A.; Somers, Garrett; Stevens, Daniel J.; Strauss, M. A.; Tayar, Jamie; Tejos, Nicolás; Treu, T.; Van Saders, J.; Vican, L.; Villanueva, S.; Yuk, H.; Zakamska, N. L.; Zhu, W.; Anderson, M. D.; Arévalo, P.; Bazhaw, C.; Bisogni, S.; Borman, G. A.; Bottorff, M. C.; Brandt, W. N.; Breeveld, A. A.; Cackett, E. M.; Carini, M. T.; Crenshaw, D. M.; Lorenzo Cáceres, A. de; Dietrich, M.; Edelson, R.; Efimova, N. V.; Ely, J.; Evans, P. A.; Ferland, G. J.; Flatland, K.; Gehrels, N.; Geier, S.; Gelbord, J. M.; Grupe, D.; Gupta, A.; Hall, P. B.; Hicks, S.; Horenstein, D.; Horne, Keith; Hutchison, T.; Im, M.; Joner, M. D.; Jones, J.; Kaastra, J.; Kaspi, S.; Kelly, B. C.; Kennea, J. A.; Kim, M.; Kim, S. C.; Klimanov, S. A.; Lee, J. C.; Leonard, D. C.; Lira, P.; MacInnis, F.; Mathur, S.; McHardy, I. M.; Montouri, C.; Musso, R.; Nazarov, S. V.; Netzer, H.; Norris, R. P.; Nousek, J. A.; Okhmat, D. N.; Papadakis, I.; Parks, J. R.; Pott, J.-U.; Rafter, S. E.; Rix, H.-W.; Saylor, D. A.; Schnülle, K.; Sergeev, S. G.; Siegel, M.; Skielboe, A.; Spencer, M.; Starkey, D.; Sung, H.-I.; Teems, K. G.; Turner, C. S.; Uttley, P.; Villforth, C.; Weiss, Y.; Woo, J.-H.; Yan, H.; Young, S.; Zu, Y. (Institute of Physics Publishing, 2017)
      We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multi-wavelength reverberation mapping campaign. The campaign spanned six months and achieved an almost daily ...
    • The effect of nuclear gas distribution on the mass determination of supermassive black holes 

      Mejía Restrepo, J. E.; Lira Teillery, Paulina; Netzer, H.; Trakhtenbrot, B.; Capellupo, D. M. (Nature Publishing Group, 2018)
      Supermassive black holes reside in the nuclei of most galaxies. During their active episodes, black holes are powered by accretion discs where gravitational energy is converted into radiation(1). Accurately determining ...