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Extremely Rapid Variations of Water Maser Emission from the Circinus Galaxy
L. J. Greenhill, S. P. Ellingsen, R. P. Norris +4
The water maser lines in the nucleus of the Circinus galaxy vary on time scales as short as a few minutes, at least two orders of magnitude less than for other Galactic or extragal…
ASCA observations of Seyfert 1 galaxies: I. Data Analysis, Imaging and Timing
K. Nandra, I. M. George, R. F. Mushotzky +2
We present the first in a series of papers describing the X-ray properties of a sample of 18 Seyfert 1 galaxies, using data obtained by \asca. The imaging data reveal a number of s…
The Mass of Abell 1060 and AWM 7 from Spatially Resolved X-ray Spectroscopy: Variations in Baryon Fraction
Michael Loewenstein, Richard Mushotzky
Using X-ray temperature and surface brightness profiles of the hot intracluster medium derived from ASCA and ROSAT observations we place constraints on the dark matter and baryon f…
ASCA observations of Seyfert 1 galaxies: II. Relativistic Iron K-alpha emission
K. Nandra, I. M. George, R. F. Mushotzky +2
We present evidence for widespread relativistic effects in the central regions of active galactic nuclei. In a sample of 18 Seyfert 1 galaxies observed by \asca, 14 show an iron K$…