5 papers
The nature of the faint sub-mJy radio population
Nick Seymour, Ian McHardy, Katherine Gunn +1
The up-turn in Euclidean normalised source counts below 1mJy at 1.4GHz is well established in many deep radio surveys. There are strong reasons, observationally and theoretically,…
VLBI observations of 3C273 at 22 GHz and 43 GHz. II: test of Synchrotron Self-Compton process
F. Mantovani, W. Junor, I. M. McHardy +1
The VLBI observations at 22 GHz and 43 GHz of the quasar 3C273 obtained during a multi-frequency campaign in late 1992 in the radio, millimetre and X-ray bands allow us to derive t…
VLBI observations of 3C273 at 22GHz and 43 GHz. I: Search for short time-scale structural variation
F. Mantovani, W. Junor, C. Valerio +1
The results of VLBI observations of the quasar 3C273, obtained during a multi-frequency campaign in late 1992 in the radio, millimeter and X-ray bands are presented and discussed.…
EUVE-RXTE simultaneous observations of NGC 4051: variability and spectrum
I. Cagnoni, A. Fruscione, I. M. McHardy +1
We present timing and spectral analysis of the data collected by the Extreme Ultraviolet Explorer Satellite (EUVE) for the Seyfert 1 galaxy NGC 4051 during 1996. NGC 4051 was obser…
Ultraviolet Isotropic Emission from the Blazar 3C 279
E. Pian, A. Koratkar, L. Maraschi +7
Archival IUE SWP and HST FOS spectra show the presence of a relatively strong, broad Lyman alpha emission line superposed onto the UV spectral continuum of the blazar 3C 279. As op…