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Your search keyword '"Almaini, O"' showing total 3 results
Start Over Author "Almaini, O" Publication Type Conference Materials
3 results on '"Almaini, O"'

3. The 0.5-10 keV spectra of broad-line quasars and the X-ray background.

Author

Pappa, A., Stewart, G. C., Georgantopoulos, I., Griffiths, R. E., Boyle, B. J., Shanks, T., and Almaini, O.

Subjects
QUASARS, SPECTRUM analysis
Abstract

We present an analysis of the ROSAT and ASCA spectra of 21 broad line quasars detected in six ROSAT deep fields with the ASCA GIS. The summed spectrum in the ASCA band is well described by a power-law with γ = 1.56 ± 0.2, flatter that the average spectral index of bright quasars. The 0.5-8keV ASCA -ROSAT spectrum is well fit by a power-law of γ = 1.7 ± 0.2 when a soft excess component is included. The analysis of the individual hardness ratios confirms the flattening of the spectral index towards fainter fluxes. [ABSTRACT FROM AUTHOR]

Published
2001

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