8 papers · 1 filter
Properties of X-ray selected Broad Absorption Line Quasars
A. J. Blustin, T. Dwelly, M. J. Page +6
Broad absorption line quasars (commonly termed BALQSOs) contain the most dramatic examples of AGN-driven winds. The high absorbing columns in these winds, ~10^24 cm^-2, ensure that…
A 610 MHz Survey of the 1H XMM-Newton/Chandra Survey Field
D. Moss, N. Seymour, I. M. McHardy +3
We present the results of a deep 610 MHz survey of the 1^H XMM/Chandra survey area with the GMRT. The resulting maps have a resolution of ~7 arcsec and an rms noise limit of 60 mic…
Simultaneous X-ray and infrared variability in the quasar 3C273 II: Confirmation of the correlation and X-ray lag
Ian McHardy, Anthony Lawson, Andrew Newsam +4
The X-ray emission from quasars such as 3C273 is generally agreed to arise from Compton scattering of low energy seed photons by relativistic electrons in a relativistic jet orient…
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.…