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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astro-ph2004★ 91 cited

Complex X-ray Absorption and the Fe Kalpha Profile in NGC 3516

T. J. Turner, S. B. Kraemer, I. M. George +2

We present data from simultaneous Chandra, XMM-Newton and BeppoSAX observations of the Seyfert 1 galaxy NGC 3516, taken during 2001 April and Nov. We have investigated the nature o…

astro-ph2004★ 15 cited

An extreme, blueshifted iron line profile in the Narrow Line Seyfert 1 PG 1402+261; an edge-on accretion disk or highly ionized absorption?

J. N. Reeves, D. Porquet, T. J. Turner

We report on a short XMM-Newton observation of the radio-quiet Narrow Line Seyfert 1 PG 1402+261. The EPIC X-ray spectrum of PG 1402+261 shows a strong excess of counts between 6-9…

astro-ph2004★ 17 cited

High-Resolution Ultraviolet Spectra of the Dwarf Seyfert 1 Galaxy NGC 4395: Evidence for Intrinsic Absorption

D. M. Crenshaw, S. B. Kraemer, J. R. Gabel +5

We present ultraviolet spectra of the dwarf Seyfert 1 nucleus of NGC 4395, obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) and the Hubble Space Telescope's Space Te…

astro-ph2004★ 13 cited

Simultaneous X-ray and Ultraviolet spectroscopy of the Seyfert galaxy NGC 5548. III. X-ray time variability

J. S. Kaastra, K. C. Steenbrugge, D. M. Crenshaw +8

The Seyfert 1 galaxy NGC 5548 was observed for a week by Chandra using both the HETGS and LETGS spectrometers. In this paper we study the time variability of the continuum radiatio…

astro-ph2004

Timing Analysis of Light Curves in the Tartarus Active Galactic Nuclei Database

Paul M. O'Neill, Kirpal Nandra, Iossif E. Papadakis +1

The Tartarus database contains products for 529 ASCA observations of active galactic nuclei. We have been updating Tartarus to include observing sequences conducted after 1999 Janu…