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Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
Shai Kaspi, Paul S. Smith, Hagai Netzer +3
(abridged) We have spectrophotometrically monitored a well-defined sample of 28 Palomar-Green quasars in order to obtain measurements of their BLRs and to investigate the relations…
X-ray Observations of Optically-Selected, Radio-Quiet Quasars I: The ASCA results
I. M. George, T. J. Turner, T. Yaqoob +5
We present the result of 27 ASCA observations of 26 radio-quiet quasars (RQQs) from the PG survey. All the RQQs were detected except 2 BALQSOs. We find the variability characterist…
A search for broad infrared recombination lines in NGC 1068
D. Lutz, R. Genzel, E. Sturm +12
We report infrared spectroscopy of the prototypical Seyfert 2 galaxy NGC 1068, aiming at detection of broad components of hydrogen recombination lines that originate in the obscure…
Akn 564: an unusual component in the X-ray spectra of NLSy1 galaxies
T. J. Turner, I. M. George, Hagai Netzer
We present an ASCA observation of the NLSy1 Ark 564. The X-ray light curve shows rapid variability, but no evidence for energy-dependence to these variations, within the 0.6 -- 10…
Modeling Variable Emission Lines in AGNs: Method and Application to NGC 5548
Shai Kaspi, Hagai Netzer
We present a new scheme for modeling the broad line region in active galactic nuclei (AGNs). It involves photoionization calculations of a large number of clouds, in several pre-de…
Long-term optical variability properties of the Palomar-Green quasars
Uriel Giveon, Dan Maoz, Shai Kaspi +2
We present results from a monitoring program of 42 quasars from the Palomar Green sample. The objects were observed for 7 years at the Wise Observatory, as part of a long term effo…