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Observing Mkn 421 with XMM--Newton: the EPIC--PN point of view
M. Ravasio, G. Tagliaferri, G. Ghisellini +1
We present three observations (four exposures) of Mkn 421 performed by XMM--Newton in the Autumn of 2002, concentrating on the EPIC--PN camera data. The X-ray spectra were soft and…
Jets from Sub-Parsec to Kiloparsec Scales: A Physical Connection
F. Tavecchio, L. Maraschi, R. M. Sambruna +4
The Chandra discovery of bright X-ray emission from kpc-scale jets allows insight into the physical parameters of the jet flow at large scale. At the opposite extreme, extensive st…
Structured jets in TeV BL Lac objects and radiogalaxies
G. Ghisellini, F. Tavecchio, M. Chiaberge
TeV BL Lacertae objects require extreme relativistic bulk motion in the gamma-ray emission region, but at the VLBI scale their radio knots hardly move. The same sources show eviden…
The Gamma-ray bright BL Lac object RX J1211+2242
V. Beckmann, P. Favre, F. Tavecchio +3
RX J1211+2242 is an optically faint (B = 19.2 mag) but X-ray bright (2 - 10 keV flux fx = 5e-12 erg/cm**2/sec) AGN, which has been shown to be a BL Lac object at redshift z = 0.455…
Late evolution of the X-ray afterglow of GRB 030329
A. Tiengo, S. Mereghetti, G. Ghisellini +2
The X-ray afterglow of the Gamma-Ray Burst GRB 030329, associated to SN2003dh at z=0.1685, has been observed with XMM-Newton 258 days after the burst explosion. A source with flux…
Extragalactic jets: the high energy view
Fabrizio Tavecchio
I review the current knowledge of high-energy emission from extragalctic jets. First I discuss gamma-ray emission from blazars, which provides us numerous precious information on t…
A survey of extended radio jets with Chandra and HST
R. M. Sambruna, J. K. Gambill, L. Maraschi +5
We present the results from an X-ray and optical survey of a sample of 17 radio jets in AGN performed with Chandra and HST. The sample was selected from the radio and is unbiased t…