Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-02
Nucl.Phys.Proc.Suppl.132:161-164,2004
Astronomy and Astrophysics
Astrophysics
4 pages, 6 figures, poster presented at the symposium: The Restless High-Energy Universe, Amsterdam, May 2003
Scientific paper
10.1016/j.nuclphysbps.2004.04.02
Towards the end of the BeppoSAX mission, the only operated Narrow Field Instrument was the PDS, which covers the energy range 13-300 keV. Two blazars, 1ES 0507-040 (z=0.304) and PKS 1229-021 (z= 1.045), suitably located in the sky for BeppoSAX pointing, were observed for about 2 days each in Spring 2002 with the PDS and detected up to 50 keV. 1ES0507-040 had been already observed by the BeppoSAX NFIs at an earlier epoch for a much shorter time. We have re-analysed those data as well, and identified a possible contamination problem in the PDS spectrum. We present our recent PDS data on both sources, combined with the previous BeppoSAX data and with non-simultaneous observations at other frequencies. The derived Spectral Energy Distributions allow us to discuss the origin of the high energy component.
Chiappetti Lucio
Ghisellini Gabriele
Maraschi Laura
Pian Elena
Tavecchio Fabrizio
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