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6 papers · 2 filters
ASCA and ROSAT X-ray Spectra of High-Redshift Radio-Loud Quasars
M. Cappi, M. Matsuoka, A. Comastri +4
Results are presented on the X-ray properties of 9 high-redshift (1.2 < z < 3.4) radio-loud quasars (RLQs) observed by ASCA (10 observations) and ROSAT (11 observations, for a subs…
Spectral Variability and iron line emission in the ASCA Observations of the Seyfert 1 Galaxy NGC4051
Matteo Guainazzi, Tatehiro Mihara, Chiko Otani +1
We present the results of an extensive analysis of the ``ASCA'' AO2 observation of the Seyfert 1 galaxy NGC4051. The target exhibits broadband [0.5--10 keV] variability by a factor…
ASCA observations of the iron K complex of Circinus X-1 near zero phase: spectral evidence for partial covering
W. N. Brandt, A. C. Fabian, T. Dotani +4
We report on ASCA energy spectra of Cir X-1 taken near its zero phase on 1994 August 4-5. The ASCA SIS detectors allow a more detailed study of the iron K complex than has been pos…
The variable iron K emission line in MCG-6-30-15
K. Iwasawa, A. C. Fabian, C. S. Reynolds +9
We report on the variability of the iron K emission line in the Seyfert 1 galaxy MCG--6-30-15 during a four-day ASCA observation. The line consists of a narrow core at an energy of…
The X-Ray Spectral Variability of Mrk 766
K. M. Leighly, R. F. Mushotzky, T. Yaqoob +2
Analysis results from ASCA and ROSAT observations of the narrow-line Seyfert 1 galaxy Mrk 766 are reported. In the ASCA observation we observed rapid variability with a doubling ti…
ASCA Observations of the Composite Warm Absorber in NGC 3516
G. A. Kriss, J. H. Krolik, C. Otani +11
We obtained X-ray spectra of the Seyfert 1 galaxy NGC~3516 in March 1995 using ASCA. Simultaneous far-UV observations were obtained with HUT on the Astro-2 shuttle mission. The ASC…