We present BeppoSAX observations of three gamma -ray-emitting quasars, namely, 0836+710, 1510-089, and 2230+114. The three objects have been detected up to similar to 100 keV showing extremely hat power-law spectra above 2 keV (energy index alpha (2-10) = 0.3-0.5). The soft X-ray spectrum of 0836+710 implies either an absorption column density higher than the Galactic one or an intrinsically very hard slope (alpha (0.1-1) = -0.2) below 1 keV. 1510-089 shows a soft excess, with the low-energy spectrum steeper (alpha (0.1-1) = 1.6) than the high-energy power law. The results are discussed in the framework of current inverse Compton models for the high-energy emission of hat-spectrum radio quasars and are used to estimate the physical quantities in the jet-emitting region and to shed light on the energy transport mechanisms in jets. Finally we discuss the estimates of the jet luminosity in the context of the Blandford & Znajek mechanism for jet production.

Gamma-loud quasars: a view with BeppoSAX / Tavecchio, F.; Maraschi, G.; Ghisellini, G.; Celotti, Anna Lisa; Chiappetti, L.; Comastri, A.; Fossati, G.; Grandi, P.; Pian, E.; Tagliaferri, G.; Treves, A.; Raiteri, C. M.; Sambruna, R. M.; Villata, M.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 543:2(2000), pp. 535-544. [10.1086/317136]

Gamma-loud quasars: a view with BeppoSAX

Celotti, Anna Lisa;
2000-01-01

Abstract

We present BeppoSAX observations of three gamma -ray-emitting quasars, namely, 0836+710, 1510-089, and 2230+114. The three objects have been detected up to similar to 100 keV showing extremely hat power-law spectra above 2 keV (energy index alpha (2-10) = 0.3-0.5). The soft X-ray spectrum of 0836+710 implies either an absorption column density higher than the Galactic one or an intrinsically very hard slope (alpha (0.1-1) = -0.2) below 1 keV. 1510-089 shows a soft excess, with the low-energy spectrum steeper (alpha (0.1-1) = 1.6) than the high-energy power law. The results are discussed in the framework of current inverse Compton models for the high-energy emission of hat-spectrum radio quasars and are used to estimate the physical quantities in the jet-emitting region and to shed light on the energy transport mechanisms in jets. Finally we discuss the estimates of the jet luminosity in the context of the Blandford & Znajek mechanism for jet production.
2000
543
2
535
544
Tavecchio, F.; Maraschi, G.; Ghisellini, G.; Celotti, Anna Lisa; Chiappetti, L.; Comastri, A.; Fossati, G.; Grandi, P.; Pian, E.; Tagliaferri, G.; Tre...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/16841
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