We present the BeppoSAX observations of 3C 279 performed in 1997 January 13-23 simultaneously with gamma-ray pointings with EGRET on board CGRO and optical observations at the Torino Observatory (1997 January 11-18). ISO data close to this epoch are also available. We compare the derived Spectral Energy Distribution with those obtained at all other epochs with adequate multiwavelength coverage. Simple spectral models fitted to the multiepoch SEDs suggest that changes in intensity can be ascribed mainly to the variation of the bulk Lorentz factor of the plasma in the jet.
Spectral energy distribution of 3C 279 rivisited: BeppoSAX observations and variability models / Ballo, L.; Maraschi, L.; Tavecchio, F.; Celotti, Anna Lisa; Fossati, G.; Ghisellini, G.; Pian, E.; Raiteri, C.; Tagliaferri, G.; Treves, A.; Urry, C. M.; Villata, M.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 567:1(2002), pp. 50-57. [10.1086/338387]
Spectral energy distribution of 3C 279 rivisited: BeppoSAX observations and variability models
Celotti, Anna Lisa;
2002-01-01
Abstract
We present the BeppoSAX observations of 3C 279 performed in 1997 January 13-23 simultaneously with gamma-ray pointings with EGRET on board CGRO and optical observations at the Torino Observatory (1997 January 11-18). ISO data close to this epoch are also available. We compare the derived Spectral Energy Distribution with those obtained at all other epochs with adequate multiwavelength coverage. Simple spectral models fitted to the multiepoch SEDs suggest that changes in intensity can be ascribed mainly to the variation of the bulk Lorentz factor of the plasma in the jet.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
