Related papers: Mass Outflow in the Seyfert 1 Galaxy NGC 5548

Intrinsic Absorption Lines in the Seyfert 1 Galaxy NGC 5548: UV Echelle Spectra from the Space Telescope Imaging Spectrograph

We present the first observations of a Seyfert galaxy with the echelle gratings on the Space Telescope Imaging Spectrograph (STIS), which provide high-resolution (R = 40,000) coverage of the intrinsic UV absorption lines in NGC 5548. We…

Astrophysics · Physics 2009-10-31 D. Michael Crenshaw , Steven B. Kraemer

X-ray spectroscopy of NGC 5548

We analyze the high-resolution X-ray spectrum of the Seyfert 1 galaxy NGC 5548, for the full 0.1-10 keV band, using improved calibration results of the Chandra-LETGS instrument. The warm absorber consists of at least three ionization…

Astrophysics · Physics 2009-11-07 J. S. Kaastra , K. C. Steenbrugge , A. J. J. Raassen , R. L. J. van der Meer , A. C. Brinkman , D. A. Liedahl , E. Behar , A. de Rosa

Intrinsic Absorption Lines in Seyfert 1 Galaxies. I. Ultraviolet Spectra from the Hubble Space Telescope

We present a study of the intrinsic absorption lines in the ultraviolet spectra of Seyfert 1 galaxies. We find that the fraction of Seyfert 1 galaxies that show absorption associated with their active nuclei is more than one-half (10/17),…

Astrophysics · Physics 2008-11-26 D. Michael Crenshaw , Steven B. Kraemer , Albert Boggess , Stephen P. Maran , Richard F. Mushotzky , Chi-Chao Wu

Mass Outflow from the Nucleus of the Seyfert 1 Galaxy NGC 4151

We present an analysis of UV and optical spectra of NGC 4151 obtained at high spectral and angular resolutions with the Hubble Space Telescope's (HST's) Space Telescope Imaging Spectrograph (STIS). We identify a kinematic component of the…

Astrophysics · Physics 2011-02-11 D. M. Crenshaw , S. B. Kraemer

High-Resolution Ultraviolet Spectra of the Dwarf Seyfert 1 Galaxy NGC 4395: Evidence for Intrinsic Absorption

We present ultraviolet spectra of the dwarf Seyfert 1 nucleus of NGC 4395, obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) and the Hubble Space Telescope's Space Telescope Imaging Spectrograph at velocity resolutions of 7 to…

Astrophysics · Physics 2009-11-10 D. M. Crenshaw , S. B. Kraemer , J. R. Gabel , H. R. Schmitt , A. V. Filippenko , L. C. Ho , J. C. Shields , T. J. Turner

The Connection between the Narrow-Line Region and the UV Absorbers in Seyfert Galaxies

We present evidence that the outflowing UV absorbers in Seyfert 1 galaxies arise primarily in their inner narrow (emission) line regions (NLRs), based on similarities in their locations, kinematics, and physical conditions. 1) Hubble Space…

Astrophysics · Physics 2009-11-10 D. M. Crenshaw , S. B. Kraemer

Simultaneous UV and X-ray Spectroscopy of the Seyfert 1 Galaxy NGC 5548. I. Physical Conditions in the UV Absorbers

We present new UV spectra of the nucleus of the Seyfert 1 galaxy NGC 5548, which we obtained with the Space Telescope Imaging Spectrograph at high spectral resolution, in conjunction with simultaneous Chandra X-ray Observatory spectra.…

Astrophysics · Physics 2009-11-07 D. M. Crenshaw , S. B. Kraemer , J. R. Gabel , J. S. Kaastra , K. C. Steenbrugge , A. C. Brinkman , J. P. Dunn , I. M. George , D. A. Liedahl , F. B. S. Paerels , T. J. Turner , T. Yaqoob

STIS Echelle Observations of NGC 4151: Variable Ionization of the Intrinsic UV Absorbers

We present echelle observations of the intrinsic UV absorption lines in the Seyfert galaxy NGC 4151, which were obtained with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope on 1999 July 19. The UV continuum…

Astrophysics · Physics 2009-10-31 D. M. Crenshaw , S. B. Kraemer , J. B. Hutchings , A. C. Danks , T. R. Gull , M. E. Kaiser , C. H. Nelson , D. Weistrop

Far Ultraviolet Spectroscopic Explorer Observations of the Seyfert 1.5 Galaxy NGC 5548 in a Low State

We present far-ultraviolet spectra of the Seyfert 1.5 galaxy NGC 5548 obtained in 2000 June with the Far Ultraviolet Spectroscopic Explorer (FUSE). Our data span the observed wavelength range 915--1185 Angstroms at a resolution of 20 km/s.…

Astrophysics · Physics 2009-11-07 M. S. Brotherton , R. F. Green , G. A. Kriss , W. Oegerle , M. E. Kaiser , W. Zheng , J. B. Hutchings

Intrinsic Absorption in NGC 7469

We present results from a coordinated FUSE, HST/STIS and Chandra campaign to study intrinsic UV and X-ray absorption in the outflow of the Seyfert 1 galaxy NGC 7469. Previous non-simultaneous observations of this outflow found two distinct…

Astrophysics · Physics 2007-05-23 Jennifer E. Scott , the FUSE AGN Working Group

Simultaneous X-ray and UV spectroscopy of the Seyfert 1 galaxy NGC 5548.II. Physical conditions in the X-ray absorber

We present the results from a 500 ks Chandra observation of the Seyfert 1 galaxy NGC 5548. We detect broadened emission lines of O VII and C VI in the spectra, similar to those observed in the optical and UV bands. The source was…

Astrophysics · Physics 2009-11-10 K. C. Steenbrugge , J. S. Kaastra , D. M. Crenshaw , S. B. Kraemer , N. Arav , I. M. George , D. A. Liedahl , R. L. J. van der Meer , F. B. S. Paerels , T. J. Turner , T. Yaqoob

Observations of Outflowing UV Absorbers in NGC 4051 with the Cosmic Origins Spectrograph

We present new Hubble Space Telescope (HST)/Cosmic Origins Spectrograph observations of the Narrow-Line Seyfert 1 galaxy NGC 4051. These data were obtained as part of a coordinated observing program including X-ray observations with the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 S. B. Kraemer , D. M. Crenshaw , J. P. Dunn , T. J. Turner , A. P. Lobban , L. Miller , J. N. Reeves , T. C. Fischer , V. Braito

X-ray absorption lines in the Seyfert 1 galaxy NGC 5548 discovered with Chandra-LETGS

We present for the first time a high-resolution X-ray spectrum of a Seyfert galaxy. The Chandra-LETGS spectrum of NGC 5548 shows strong, narrow absorption lines from highly ionised species (the H-like and He-like ions of C, N, O, Ne, Na,…

Astrophysics · Physics 2007-05-23 J. S. Kaastra , R. Mewe , D. A. Liedahl , S. Komossa , A. C. Brinkman

The Ionized Gas and Nuclear Environment in NGC 3783 V. Variability and Modeling of the Intrinsic Ultraviolet Absorption

We present results on the location, physical conditions, and geometry of the outflow in the Seyfert 1 galaxy NGC 3783 from a study of the variable intrinsic UV absorption. Based on 18 observations with HST/STIS and 6 observations with FUSE,…

Astrophysics · Physics 2009-11-11 J. R. Gabel , S. B. Kraemer , D. M. Crenshaw , I. M. George , W. N. Brandt , F. W. Hamann , M. E. Kaiser , S. Kaspi , G. A. Kriss , S. Mathur , K. Nandra , H. Netzer , B . M. Peterson , J. C. Shields , T. J. Turner , W. Zheng

The Ionized Gas and Nuclear Environment in NGC 3783 III. Detection of a Decreasing Radial Velocity in an Intrinsic UV Absorber

We report an intrinsic absorber with decreasing outflow velocity in the Seyfert 1 galaxy NGC 3783. This is the first detection of a change in radial velocity in an outflow associated with a Seyfert galaxy. These results are based on…

Astrophysics · Physics 2009-11-07 J. R. Gabel , D. M. Crenshaw , S. B. Kraemer , W. N. Brandt , I. M. George , F. W. Hamann , M. E. Kaiser , S. Kaspi , G. A. Kriss , S. Mathur , R. F. Mushotzky , K. Nandra , H. Netzer , B. M. Peterson , J. C. Shields , T. J. Turner , W. Zheng

Evidence for a Physically Compact Narrow-Line Region in the Seyfert 1 Galaxy NGC 5548

We have combined HST/FOS and ground-based spectra of the Seyfert 1 galaxy NGC 5548 to study the narrow emission lines over the 1200 -- 10,000 angstrom region. All of the spectra were obtained when the broad emission line and continuum…

Astrophysics · Physics 2009-10-30 Steven B. Kraemer , D. Michael Crenshaw , Alexei V. Filippenko , Bradley M. Peterson

Intrinsic Absorption in the Spectrum of NGC 7469: Simultaneous Chandra, FUSE, and STIS Observations

We present simultaneous X-ray, far-ultraviolet, and near-ultraviolet spectra of the Seyfert 1 galaxy NGC 7469 obtained with the Chandra X-Ray Observatory, the Far Ultraviolet Spectroscopic Explorer, and the Space Telescope Imaging…

Astrophysics · Physics 2009-11-13 Jennifer E. Scott , Gerard A. Kriss , Julia C. Lee , Jessica Kim Quijano , Michael Brotherton , Claude R. Canizares , Richard F. Green , John Hutchings , Mary Elizabeth Kaiser , Herman Marshall , William Oegerle , Patrick Ogle , Wei Zheng

Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum

We model the ultraviolet spectra of the Seyfert 1 galaxy NGC~5548 obtained with the Hubble Space Telescope during the 6-month reverberation-mapping campaign in 2014. Our model of the emission from NGC 5548 corrects for overlying absorption…

Astrophysics of Galaxies · Physics 2019-09-04 G. A. Kriss , G. De Rosa , J. Ely , B. M. Peterson , J. Kaastra , M. Mehdipour , G. J. Ferland , M. Dehghanian , S. Mathur , R. Edelson , K. T. Korista , N. Arav , A. J. Barth , M. C. Bentz , W. N. Brandt , D. M. Crenshaw , E. Dalla Bontà , K. D. Denney , C. Done , M. Eracleous , M. M. Fausnaugh , E. Gardner , M. R. Goad , C. J. Grier , Keith Horne , C. S. Kochanek , I. M. Mchardy , H. Netzer , A. Pancoast , L. Pei , R. W. Pogge , D. Proga , C. Silva , N. Tejos , M. Vestergaard , S. M. Adams , M. D. Anderson , P. Arévalo , T G. Beatty , E. Behar , V. N. Bennert , S. Bianchi , A. Bigley , S. Bisogni , R. Boissay-Malaquin , G. A. Borman , M. C. Bottorff , A. A. Breeveld , M. Brotherton , J. E. Brown , J. S. Brown , E. M. Cackett , G. Canalizo , M. Cappi , M. T. Carini , K. I. Clubb , J. M. Comerford , C. T. Coker , E. M. Corsini , E. Costantini , S. Croft , K. V. Croxall , A. J. Deason , A. De Lorenzo-Cáceres , B. De Marco , M. Dietrich , L. Di Gesu , J. Ebrero , P. A. Evans , A. V. Filippenko , K. Flatland , E. L. Gates , N. Gehrels , Z S. Geier , J. M. Gelbord , L. Gonzalez , V. Gorjian , D. Grupe , A. Gupta , P. B. Hall , C. B. Henderson , S. Hicks , E. Holmbeck , T. W. -S. Holoien , T. A. Hutchison , M. Im , J. J. Jensen , C. A. Johnson , M. D. Joner , S. Kaspi , B. C. Kelly , P. L. Kelly , J. A. Kennea , M. Kim , S. C. Kim , S. Y. Kim , A. King , S. A. Klimanov , Y. Krongold , M. W. Lau , J. C. Lee , D. C. Leonard , Miao Li , P. Lira , C. Lochhaas , Zhiyuan Ma , F. Macinnis , M. A. Malkan , E. R. Manne-Nicholas , G. Matt , J. C. Mauerhan , R. Mcgurk , C. Montuori , L. Morelli , A. Mosquera , D. Mudd , F. Müller-Sánchez , S. V. Nazarov , R. P. Norris , J. A. Nousek , M. L. Nguyen , P. Ochner , D. N. Okhmat , S. Paltani , J. R. Parks , C. Pinto , A. Pizzella , R. Poleski , G. Ponti , J. -U. Pott , S. E. Rafter , H. -W. Rix , J. Runnoe , D. A. Saylor , J. S. Schimoia , K. Schnülle , B. Scott , S. G. Sergeev , B. J. Shappee , I. Shivvers , M. Siegel , G. V. Simonian , A. Siviero , A. Skielboe , G. Somers , M. Spencer , D. Starkey , D. J. Stevens , H. -I. Sung , J. Tayar , K. G. Teems , T. Treu , C. S. Turner , P. Uttley , J . Van Saders , L. Vican , C. Villforth , S. Villanueva , D. J. Walton , T. Waters , Y. Weiss , J. -H. Woo , H. Yan , H. Yuk , W. Zheng , W. Zhu , Y. Zu

Infrared spectroscopy of NGC4151: Probing the obscured ionizing AGN continuum

The ISO-SWS infrared spectroscopic observations of the nucleus of Seyfert galaxy NGC4151, which are described in a companion paper, are used together with a compilation of UV to IR narrow emission line data to determine the spectral shape…

Astrophysics · Physics 2009-10-30 Tal Alexander , Eckhard Sturm , Dieter Lutz , Amiel Sternberg , Hagai Netzer , Reinhard Genzel

STIS Echelle Observations of the Seyfert Galaxy NGC 4151: Physical Conditions in the Ultraviolet Absorbers

We have examined the physical conditions in intrinsic UV-absorbing gas in the Seyfert galaxy NGC 4151, using echelle spectra obtained with the Space Telescope Imaging Spectrograph (STIS). We confirm the presence of the kinematic components…

Astrophysics · Physics 2009-11-06 S. B. Kraemer , D. M. Crenshaw , J. B. Hutchings , I. M. George , A. C. Danks , T. R. Gull , M. E. Kaiser , C. H. Nelson , D. Weistrop