Ultraviolet variability of NGC 5548 - Dynamics of the continuum production region and geometry of the broad-line region

1991 ◽  
Vol 371 ◽  
pp. 541 ◽  
Author(s):  
J. H. Krolik ◽  
Keith Horne ◽  
T. R. Kallman ◽  
M. A. Malkan ◽  
R. A. Edelson ◽  
...  
Keyword(s):  
Broad Line ◽  
Production Region ◽  
Broad Line Region ◽  
Line Region ◽  
Ngc 5548 ◽  
The Continuum

scholarly journals The Infrared, Optical and Ultraviolet Properties of Active Nuclei

1984 ◽  
Vol 110 ◽  
pp. 73-83
Author(s):  
Marie-Helene Ulrich
Keyword(s):  
Energy Distribution ◽  
Temporal Variations ◽  
Optical Polarization ◽  
Broad Line ◽  
Continuum Spectrum ◽  
Broad Line Region ◽  
Line Region ◽  
The Continuum

We review the important properties of active nuclei, in particular (i) the optical polarization and its relation to the jets found by VLBI (ii) the energy distribution and the temporal variations of the continuum spectrum and (iii) the distribution of the matter in the broad line region.

scholarly journals 11.6. Spectral monitoring of AGN at the 6 meter telescope

1998 ◽  
Vol 184 ◽  
pp. 467-468
Author(s):  
N.G. Bochkarev ◽  
A.I. Shapovalova ◽  
A.N. Burenkov ◽  
V.V. Vlasyuk
Keyword(s):  
Special Astrophysical Observatory ◽  
Broad Line ◽  
North Caucasus ◽  
Ngc 4151 ◽  
Broad Line Region ◽  
Line Region ◽  
Ngc 5548 ◽  
Spectral Monitoring ◽  
Ngc 7469

To study broad line region (BLR) size and kinematics spectral monitoring of NGC 3516, NGC 4151, NGC 5548, NGC 7469 and 3C390.3 has been performed with the 6 m telescope of the Special Astrophysical Observatory (N. Arkhyz- North Caucasus) in 1986–1996. The spectra are obtained in the Nasmyth focus using the TV scanner with a resolution of 3–4Å and S/N= 10–25 within 4000–5200ÅÅ (1986–94, 500 spectra), and in the prime focus with the spectrograph UAGS (a long-slit mode) + CCD (resolution 5–10Å) or multi-pupil field spectrograph (MPFS) + CCD (resolution 4Å) within 4000–7000ÅÅ and S/N=50–100 (1995–96, 270 spectra).

scholarly journals Broad Line Variations in NGC 5548

1989 ◽  
Vol 134 ◽  
pp. 114-115
Author(s):  
Edward I. Rosenblatt ◽  
Matthew A. Malkan
Keyword(s):  
Monitoring Program ◽  
Seyfert Galaxies ◽  
Active Galaxies ◽  
Broad Line ◽  
Line Flux ◽  
Continuum Source ◽  
Line Region ◽  
Profile Changes ◽  
Ngc 5548 ◽  
The Continuum

Since broad line variations can, in principle, constrain the structure and kinematics of the broad line region in active galaxies we have conducted a monitoring program of 20 Seyfert galaxies over a 5 year period in order to study broad line flux and profile changes. Included in our sample is the Seyfert 1.5 galaxy NGC 5548. Fifteen observations were taken from 1979 to 1984 mainly with the 60″ Palomar telescope and a SIT vidicon spectrograph. Measurements show (Fig. 1) that both the Hβ and Hγ line flux varied by 200% and the continuum varied by 300%. Furthermore, these changes were positively correlated as one would expect from photoionization by a central continuum source.

scholarly journals REVERBERATION MAPPING OF THE BROAD-LINE REGION IN NGC 5548: EVIDENCE FOR RADIATION PRESSURE?

2016 ◽  
Vol 827 (2) ◽  
pp. 118 ◽  
Author(s):  
Kai-Xing Lu ◽  
Pu Du ◽  
Chen Hu ◽  
Yan-Rong Li ◽  
Zhi-Xiang Zhang ◽  
...  
Keyword(s):  
Radiation Pressure ◽  
Broad Line ◽  
Reverberation Mapping ◽  
Broad Line Region ◽  
Line Region ◽  
Ngc 5548
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