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Evidence for Ionised Accretion Discs in Five Narrow-Line Seyfert 1 Galaxies
D. R. Ballantyne, K. Iwasawa, A. C. Fabian
(Abridged) We present the results of fitting ASCA spectra of six narrow-line Seyfert 1 (NLS1) galaxies with the ionised reflection models of Ross & Fabian (1993). We find that five…
The X-ray Spectrum and Light Curve of Supernova 1995N
D. W. Fox, W. H. G. Lewin, A. Fabian +10
We report on multi-epoch X-ray observations of the Type IIn (narrow emission line) supernova SN 1995N with the ROSAT and ASCA satellites. The January 1998 ASCA X-ray spectrum is we…
X-ray absorption and rapid variability of the dwarf Seyfert nucleus of NGC4395
K. Iwasawa, A. C. Fabian, O. Almaini +4
We report the detection of an absorbed central X-ray source and its strong, rapid variability in NGC4395, the least luminous Seyfert nucleus known. The X-ray source exhibits a numb…
ROSAT PSPC detection of soft X-ray absorption in GB 1428+4217: The most distant matter yet probed with X-ray spectroscopy
Th. Boller, A. C. Fabian, W. N. Brandt +1
We report on a ROSAT PSPC observation of the highly-luminous z = 4.72 radio-loud quasar GB 1428+4217 obtained between 1998 December 11 and 17, the final days of the ROSAT satellite…
Broad iron lines in Active Galactic Nuclei
A. C. Fabian, K. Iwasawa, C. S. Reynolds +1
An intrinsically narrow line emitted by an accretion disk around a black hole appears broadened and skewed as a result of the Doppler effect and gravitational redshift. The fluores…