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Gamma-loud quasars: a view with BeppoSAX

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arxiv astro-ph/0003019 v1 pith:74VTRWAO submitted 2000-03-02 astro-ph

F. Tavecchio , L. Maraschi , G. Ghisellini , A. Celotti , L. Chiappetti , A. Comastri , G. Fossati , P. Grandi
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F. Haardt E. Pian G. Tagliaferri A. Treves C.M.Raiteri R. Sambruna M. Villata
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keywords alphaenergyhighpower-lawquasarsaboveabsorptionaround
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abstract

We present $Beppo$SAX observations of the $\gamma $-ray emitting quasars 0836+710, 1510-089 and 2230+114. All the objects have been detected in the PDS up to 100 keV and have extremely flat power-law spectra above 2 keV ($\alpha _x$=0.3--0.5). 0836+710 shows absorption higher than the galactic value and marginal evidence for the presence of the redshifted 6.4 keV Iron line. 1510-089 shows a spectral break around 1 keV, with the low energy spectrum steeper ($\alpha_l$=1.6) than the high energy power-law ($\alpha_h$=0.3). The data are discussed in the light of current Inverse Compton models for the high energy emission.

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