Search Results - "Grier, Catherine J."
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THE LOW-LUMINOSITY END OF THE RADIUS-LUMINOSITY RELATIONSHIP FOR ACTIVE GALACTIC NUCLEI
Published in The Astrophysical journal (20-04-2013)“…We present an updated and revised analysis of the relationship between the H beta broad-line region (BLR) radius and the luminosity of the active galactic…”
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THE BIASES OF OPTICAL LINE-RATIO SELECTION FOR ACTIVE GALACTIC NUCLEI AND THE INTRINSIC RELATIONSHIP BETWEEN BLACK HOLE ACCRETION AND GALAXY STAR FORMATION
Published in The Astrophysical journal (20-09-2015)“…ABSTRACT We use 317,000 emission-line galaxies from the Sloan Digital Sky Survey to investigate line-ratio selection of active galactic nuclei (AGNs). In…”
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The Sloan Digital Sky Survey Reverberation Mapping Project: The Black Hole Mass–Stellar Mass Relations at 0.2 ≲ z ≲ 0.8
Published in The Astrophysical journal (01-09-2023)“…Abstract We measure the correlation between black hole mass M BH and host stellar mass M * for a sample of 38 broad-line quasars at 0.2 ≲ z ≲ 0.8 (median…”
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AGN STORM 2. IV. Swift X-Ray and Ultraviolet/Optical Monitoring of Mrk 817
Published in The Astrophysical journal (01-12-2023)“…Abstract The AGN STORM 2 campaign is a large, multiwavelength reverberation mapping project designed to trace out the structure of Mrk 817 from the inner…”
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AGN STORM 2. III. A NICER View of the Variable X-Ray Obscurer in Mrk 817
Published in The Astrophysical journal (01-04-2023)“…Abstract The AGN STORM 2 Collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign…”
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The Sloan Digital Sky Survey Reverberation Mapping Project: Key Results
Published in The Astrophysical journal. Supplement series (01-06-2024)“…Abstract We present the final data from the Sloan Digital Sky Survey (SDSS) Reverberation Mapping (RM) project, a precursor to the SDSS-V Black Hole Mapper RM…”
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AGN STORM 2. IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-Ray Spectroscopy
Published in The Astrophysical journal (01-10-2024)“…Abstract We present the results of the XMM-Newton and NuSTAR observations taken as part of the ongoing, intensive multiwavelength monitoring program of the…”
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AGN STORM 2. II. Ultraviolet Observations of Mrk 817 with the Cosmic Origins Spectrograph on the Hubble Space Telescope
Published in The Astrophysical journal (01-05-2023)“…Abstract We present reverberation mapping measurements for the prominent ultraviolet broad emission lines of the active galactic nucleus Mrk 817 using 165…”
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The SDSS-V Black Hole Mapper Reverberation Mapping Project: C iv Broad Absorption Line Acceleration in the Quasar SBS 1408+544
Published in The Astrophysical journal (01-06-2024)“…Abstract We present the results of an investigation of a highly variable C iv broad absorption line (BAL) feature in spectra of the quasar SBS 1408+544 ( z =…”
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The Sloan Digital Sky Survey Reverberation Mapping Project: Investigation of Continuum Lag Dependence on Broad-line Contamination and Quasar Properties
Published in The Astrophysical journal (01-01-2024)“…Abstract This work studies the relationship between accretion-disk size and quasar properties, using a sample of 95 quasars from the Sloan Digital Sky Survey…”
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AGN STORM 2. V. Anomalous Behavior of the C iv Light Curve of Mrk 817
Published in The Astrophysical journal (01-03-2024)“…Abstract An intensive reverberation mapping campaign of the Seyfert 1 galaxy Mrk 817 using the Cosmic Origins Spectrograph on the Hubble Space Telescope…”
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The SDSS-V Black Hole Mapper Reverberation Mapping Project: A Kinematically Variable Broad-line Region and Consequences for the Masses of Luminous Quasars
Published in The Astrophysical journal (01-11-2024)“…Abstract We present a velocity-resolved reverberation mapping analysis of the hypervariable quasar RM160 (SDSS J141041.25+531849.0) at z = 0.359 with 153…”
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High-quality Extragalactic Legacy-field Monitoring (HELM) with DECam: Project Overview and First Data Release
Published in The Astrophysical journal. Supplement series (01-10-2024)“…Abstract High-quality Extragalactic Legacy-field Monitoring (HELM) is a long-term observing program that photometrically monitors several well-studied…”
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On the variability of quasars: a link between the Eddington ratio and optical variability?
Published in Monthly notices of the Royal Astronomical Society (01-01-2008)“…Repeat scans by the Sloan Digital Sky Survey (SDSS) of a 278-deg2 stripe along the celestial equator have yielded an average of over 10 observations each for…”
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AGN STORM 2. I. First results: A Change in the Weather of Mrk 817
Published in The Astrophysical journal (01-12-2021)“…Abstract We present the first results from the ongoing, intensive, multiwavelength monitoring program of the luminous Seyfert 1 galaxy Mrk 817. While this…”
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The Sloan Digital Sky Survey Reverberation Mapping Project: Estimating Masses of Black Holes in Quasars with Single-epoch Spectroscopy
Published in The Astrophysical journal (01-11-2020)“…Abstract It is well known that reverberation mapping of active galactic nuclei (AGNs) reveals a relationship between AGN luminosity and the size of the…”
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AGN STORM 2. VI. Mapping Temperature Fluctuations in the Accretion Disk of Mrk 817
Published in The Astrophysical journal (01-02-2024)“…Abstract We fit the UV/optical lightcurves of the Seyfert 1 galaxy Mrk 817 to produce maps of the accretion disk temperature fluctuations δ T resolved in time…”
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DISCOVERY OF A LARGE POPULATION OF ULTRALUMINOUS X-RAY SOURCES IN THE BULGELESS GALAXIES NGC 337 AND ESO 501-23
Published in The Astrophysical journal (01-11-2013)“…We have used Chandra observations of eight bulgeless disk galaxies to identify new ultraluminous X-ray source (ULX) candidates, study their high-mass X-ray…”
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OPTICAL MONITORING OF THE BROAD-LINE RADIO GALAXY 3C 390.3
Published in The Astrophysical journal (20-09-2012)“…We have undertaken a new ground-based monitoring campaign on the broad-line radio galaxy 3C 390.3 to improve the measurement of the size of the broad…”
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The Physical Constraints on a New LoBAL QSO at z = 4.82
Published in The Astrophysical journal (01-04-2017)“…Very few low-ionization broad absorption line (LoBAL) QSOs have been found at high redshifts, to date. One high-redshift LoBAL QSO, J0122+1216, was recently…”
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