175 citations · 488 across the 11 of their papers we have counts for
Showing 1999Show all
2 papers · 1 filter
astro-ph1999
The concave X-ray spectrum of the blazar ON 231: the signature of intermediate BL Lac objects
G. Tagliaferri, G. Ghisellini, P. Giommi +17
ON 231 was observed with BeppoSAX in May and June 1998, following an exceptional optical outburst which occured in April--May. We measured the X-ray spectrum from 0.1 up to 100 keV…
astro-ph1999
The HST view of FR I radio galaxies: evidence for non-thermal nuclear sources
Marco Chiaberge, Alessandro Capetti, Annalisa Celotti
Unresolved nuclear sources are detected by the Hubble Space Telescope in the great majority of a complete sample of 33 FR I radio galaxies belonging to the 3CR catalogue. The optic…