activity
19962023
most citedASCA observations of Seyfert 1 galaxies: II. Relativistic Iron K-alpha emission

592 citations · 9.1k across the 138 of their papers we have counts for

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Showing 1998Show all

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astro-ph1998★ 24 cited

X-ray Observations of Mrk 231

T. J. Turner

This paper presents new X-ray observations of Mrk 231, an active galaxy of particular interest due to its large infrared luminosity and the presence of several blueshifted broad ab…

astro-ph1998★ 29 cited

A Peculiar Emission Line Feature in the X-ray Spectrum of the Quasar PKS 0637-752

T. Yaqoob, I. M. George, T. J. Turner +3

We report the results from an ASCA observation of the high-luminosity, radio-loud quasar PKS 0637-752 (redshift 0.654), covering the 0.8-15 keV band in the quasar-frame. We find th…

astro-ph1998★ 25 cited

X-ray Observations of the Seyfert galaxy LB 1727 (1H 0419-577)

T. J. Turner, I. M. George, K. Nandra +5

We discuss the properties of the Seyfert 1.5 galaxy LB 1727, also known as 1H 0419-577, from X-ray observations obtained by ASCA and ROSAT along with optical observations from earl…

astro-ph1998★ 50 cited

X-ray Signatures of an Ionized Reprocessor in the Seyfert galaxy Ton S 180

T. J. Turner, I. M. George, K. Nandra

We discuss the hard X-ray properties of the Seyfert galaxy Ton S 180, based upon the analysis of ASCA data. We find the X-ray flux varied by a factor ~2 on a time scale of a few th…

astro-ph1998★ 36 cited

The X-ray Spectral Variability of the Seyfert Galaxy NGC 3227

I. M. George, R. F. Mushotzky, T. J. Turner +4

(Abridged) We present the results from {\it ASCA} observations of NGC 3227 along with those from a {\it ROSAT} observation. The 0.6--10 keV continuum is consistent with a powerlaw…

astro-ph1998★ 40 cited

The Soft X-ray Spectrum of Scattering--Dominated AGN

H. Netzer, T. J. Turner, I. M. George

This paper discusses the properties of scattering--dominated active galactic nuclei (AGN). We define these to be AGN for which the direct line-of-sight to the continuum source is o…