SPACE TELESCOPE AND OPTICAL REVERBERATION MAPPING PROJECT. I. ULTRAVIOLET OBSERVATIONS OF THE SEYFERT 1 GALAXY NGC 5548 WITH THE COSMIC ORIGINS SPECTROGRAPH ON<i>HUBBLE SPACE TELESCOPE</i>

Rosa, Gisella De; Peterson, B. M.; Ely, Justin; Kriss, G. A.; Crenshaw, D. Michael; Horne, K.; Korista, K. T.; Netzer, H.; Pogge, Richard W.; Arévalo, P.; Barth, Aaron J.; Bentz, Misty C.; Brandt, W. N.; Breeveld, A. A.; Brewer, Brendon J.; Bontà, E. Dalla; Lorenzo-Cáceres, A. de; Denney, K. D.; Dietrich, M.; Edelson, R.; Evans, P. A.; Fausnaugh, Michael; Gehrels, N.; Gelbord, Jonathan; Goad, M. R.; Grier, C. J.; Grupe, D.; Hall, Patrick B.; Kaastra, J. S.; Kelly, Brandon C.; Kennea, J. A.; Kochanek, C. S.; Lira, P.; Mathur, S.; McHardy, I. M.; Nousek, J. A.; Pancoast, Anna; Papadakis, I. E.; Pei, L.; Schimoia, J. S.; Siegel, M. H.; Starkey, D.; Treu, Tommaso; Uttley, P.; Vaughan, S.; Vestergaard, M.; Villforth, C.; Yan, Haojing; Young, S.; Zu, Ying

doi:10.1088/0004-637x/806/1/128

Cited by 145 publications

(126 citation statements)

References 116 publications

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“…All observations used multiple central wavelength settings and focal-plane positions (FP-POS) to allow our merged spectra to span the gaps between the two detector segments and eliminate flat-field features and detector defects. The individual exposures were combined with updated wavelength calibrations, flat-field procedures, and flux calibrations as described by Kriss et al (2011) andDe Rosa et al (2015). The wavelength zero point was adjusted by matching the low-ionization interstellar absorption features in the spectrum to the H i velocity of v LSR = −7 km s −1 (Wakker et al 2011).…”

Section: Observationsmentioning

confidence: 99%

Discovery of a fast, broad, transient outflow in NGC 985

Ebrero

Kriss

Kaastra

et al. 2016

A&A

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Aims. We observed the Seyfert 1 galaxy NGC 985 on several occasions to search for variability in its UV and X-ray absorption features to establish their location and physical properties. Methods. We used XMM-Newton to obtain X-ray spectra using the EPIC-pn camera, and the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST) to obtain UV spectra. Our observations were simultaneous and span timescales of days to years. Results. We find that the soft X-ray obscuration that absorbed the low energy continuum of NGC 985 in August 2013 diminished greatly by January 2015. The total X-ray column density decreased from 2.1 × 10 22 cm −2 to ∼6 × 10 21 cm −2 . We also detect broad, fast UV absorption lines in COS spectra obtained during the 2013 obscuration event. Lines of C iii*, Lyα, Si iv, and C iv with outflow velocities of −5970 km s −1 and a full-width at half-maximum of 1420 km s −1 are prominent in the 2013 spectrum, but have disappeared in all but Lyα in the 2015 spectra. The ionization state and the column density of the UV absorbing gas is compatible with arising in the same gas as that causing the X-ray obscuration. The high velocity of the UV-absorbing gas suggests that the X-ray obscurer and the associated UV outflow are manifestations of an accretion disk wind.

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Section: Observationsmentioning

confidence: 99%

Discovery of a fast, broad, transient outflow in NGC 985

Ebrero

Kriss

Kaastra

et al. 2016

A&A

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“…However, with sufficiently high-quality RM data, we can actually resolve the time delays in velocity space and thus recover information about the possible phase space structure within the BLR. This velocityresolved analysis has been successfully done for several sets of data in recent years Denney et al 2010;Barth et al 2011b;Barth et al 2011a;Doroshenko et al 2012;Grier et al 2013b;De Rosa et al 2015;Du et al 2016;Pei et al 2017). In most cases, we see signatures of either gas in bound elliptical orbits or inflowing gas, although signatures of outflowing gas have also been seen (Denney et al 2009;Du et al 2016).…”

Section: Introductionmentioning

confidence: 99%

The Structure of the Broad-line Region in Active Galactic Nuclei. II. Dynamical Modeling of Data From the AGN10 Reverberation Mapping Campaign

Grier

Pancoast

Barth

et al. 2017

ApJ

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143

171

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We present inferences on the geometry and kinematics of the broad-Hβ line-emitting region in four active galactic nuclei monitored as a part of the fall 2010 reverberation mapping campaign at MDM Observatory led by the Ohio State University. From modeling the continuum variability and response in emission-line profile changes as a function of time, we infer the geometry of the Hβ-emitting broad line regions to be thick disks that are close to face-on to the observer with kinematics that are well-described by either elliptical orbits or inflowing gas. We measure the black hole mass to be log 10 (M BH ) = 7.25 −0.23 for PG 2130+099. These black hole mass measurements are not based on a particular assumed value of the virial scale factor f , allowing us to compute individual f factors for each target. Our results nearly double the number of targets that have been modeled in this manner, and investigate the properties of a more diverse sample by including previously modeled objects. We measure an average scale factor f in the entire sample to be log 10f = 0.54 ± 0.17 when the line dispersion is used to characterize the line width, which is consistent with values derived using the normalization of the M BH -σ relation. We find that the scale factor f for individual targets is likely correlated with the black hole mass, inclination angle, and opening angle of the broad line region but we do not find any correlation with the luminosity.

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“…Concurrent with the HST program were 4 months of Swift observations and 6 months of ground-based photometric and spectroscopic observations. First results of the HST, Swift, and ground-based photometry programs were presented by De Rosa et al (2015), Edelson et al (2015), and Fausnaugh et al (2016) (Papers I-III, respectively). Goad et al (2016) (Paper IV) explore the anomalous behavior of the UV continuum and broad emission-line light curves observed during a portion of this campaign.…”

Section: Introductionmentioning

confidence: 99%

Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548

Pei¹,

Fausnaugh²,

Barth³

et al. 2017

ApJ

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116

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We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multiwavelength reverberation mapping campaign. The campaign spanned 6 months and achieved an almost daily cadence with observations from five ground-based telescopes. The Hβ and He II λ4686 broad emission-line light curves lag that of the 5100Å optical continuum by , respectively. The Hβ lag relative to the 1158Å ultraviolet continuum light curve measured by the Hubble Space Telescope is ∼50% longer than that measured against the optical continuum, and the lag difference is consistent with the observed lag between the optical and ultraviolet continua. This suggests that the characteristic radius of the broad-line region is ∼50% larger than the value inferred from optical data alone. We also measured velocity-resolved emission-line lags for Hβ and found a complex velocity-lag structure with shorter lags in the line wings, indicative of a broadline region dominated by Keplerian motion. The responses of both the Hβ and He II emission lines to the driving continuum changed significantly halfway through the campaign, a phenomenon also observed for C IV, Lyα, He II (+O III]), and Si IV(+O IV]) during the same monitoring period. Finally, given the optical luminosity of NGC 5548 during our campaign, the measured Hβ lag is a factor of five shorter than the expected value implied by the R BLR -L AGN relation based on the past behavior of NGC 5548.

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SPACE TELESCOPE AND OPTICAL REVERBERATION MAPPING PROJECT. I. ULTRAVIOLET OBSERVATIONS OF THE SEYFERT 1 GALAXY NGC 5548 WITH THE COSMIC ORIGINS SPECTROGRAPH ONHUBBLE SPACE TELESCOPE

Cited by 145 publications

References 116 publications

Discovery of a fast, broad, transient outflow in NGC 985

Discovery of a fast, broad, transient outflow in NGC 985

The Structure of the Broad-line Region in Active Galactic Nuclei. II. Dynamical Modeling of Data From the AGN10 Reverberation Mapping Campaign

Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548

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