A BeppoSAX observation of 3C273: broadband spectrum and detection of a low-energy absorption feature
Grandi, P. · Guainazzi, M. · Mineo, T. · Parmar, A. N. · Fiore, F. · Matteuzzi, A. · Nicastro, F. · Perola, G. C. · Piro, L. · Cappi, M. · Cusumano, G. · Frontera, F. · Giarrusso, S. · Palazzi, E. · Piraino, S.
Original · EN
We report the results of a 3C273 observation performed during the Science Verification Phase (SVP) of the BeppoSax satellite. The broad-band spectrum is well represented by a power-law between 1 keV and 200 keV. The spectral slope is flat (Γ 1.6) with a weak emission line at 6.4 keV (rest frame) of EW 30 eV. Below 1 keV, a deviation from a power-law due to an absorption feature plus a soft component is present. This is the first time that a feature in absorption at 0.5 keV (observer frame) is unambiguously detected in 3C273.
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