- UHRA Home
- Browsing by Author
Browsing by Author "Cawthorne, T.V."
Now showing items 1-8 of 8
-
Discovery of a precessing jet nozzle in BL Lacertae
Stirling, A.M.; Cawthorne, T.V.; Stevens, J. A.; Jorstad, S.G.; Marscher, A.P.; Lister, M.; Gomez, J-L.; Smith, P.S.; Agudo, I.; Gabuzda, D.; Robson, E.I.; Gear, W.K. (2003) -
The Evolution of the Centimeter-Submillimeter Spectrum of 3C 345 during Outburst
Stevens, Jason; Litchfield, S.J.; Robson, E.I.; Cawthorne, T.V.; Aller, M. F.; Aller, H. D.; Hughes, P.A.; Wright, M.C.H. (1996-07-01)Monitoring data between 375 and 4.8 GHz are presented for the blazar 3C 345 between 1989 and 1995, during which period the source flared. The multifrequency light curves are used to construct snap-shot spectra that span ... -
Jet Kinematics of AGNs at High Radio Frequencies
Jorstad, S.G.; Marscher, A.P.; Lister, M.; Stirling, A.M.; Cawthorne, T.V.; Gomez, J-L.; Gear, W.K.; Stevens, J. A.; Robson, E.I.; Smith, P.S.; Forster, J.R. (Astronomical Society of the Pacific, 2006)We have completed a 3 yr program of polarization monitoring of 15 active galactic nuclei with the Very Long Baseline Array at 7 mm wavelength. At some epochs the images are accompanied by nearly simultaneous polarization ... -
Multi-frequency Polarization Properties of Blazars
Jorstad, S.G.; Marscher, A.P.; Stevens, J. A.; Robson, E.I.; Lister, M.; Stirling, A.M.; Smith, P.S.; Cawthorne, T.V.; Gomez, J-L.; Gabuzda, D.; Gear, W.K. (Astronomical Society of the Pacific, 2005)We have obtained total and polarized intensity images of 15 AGNs with the VLBA at 7 mm at 17 epochs, accompanied at many epochs by nearly simultaneous measurements of polarization at 1.35/0.85 mm and at optical wavelengths. ... -
Multiwaveband polarimetric observations of 15 active galactic nuclei at high frequencies: correlated polarization behaviour
Jorstad, S.G.; Marscher, A.P.; Stevens, J. A.; Smith, P.S.; Forster, J.R.; Gear, W.K.; Cawthorne, T.V.; Lister, M.; Stirling, A.M.; Gomez, J-L.; Greaves, J.S.; Robson, E.I. (2007) -
Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the very Long Baseline Array
Marscher, A.P.; Jorstad, S.G.; Lister, M.; Stirling, A.M.; Cawthorne, T.V.; Gear, W.K.; Gomez, J-L.; Stevens, J. A.; Smith, P.S.; Forster, J.R.; Robson, E.I. (2005-10) -
Polarimetric Observations of 15 AGNs at High Frequencies
Jorstad, S.G.; Marscher, A.P.; Stevens, J. A.; Robson, I.; Lister, M.; Stirling, A.M.; Cawthorne, T.V.; Smith, P.S.; Gomez, J-L.; Gabuzda, D.; Gear, W.K. (Astronomical Society of the Pacific, 2005)We have obtained total and polarized intensity images of 15 AGNs with the VLBA at 7 mm at 17 epochs from 25/26 March 1998 to 14 April 2001. The VLBA observations are accompanied at many epochs by simultaneous mea- surements ... -
Variability of the Centimeter-Submillimeter Spectrum and Polarization of 3C 273 during Outburst
Stevens, J. A.; Robson, E.I.; Gear, W.K.; Cawthorne, T.V.; Aller, M.; Aller, H.; Terasranta, H.; Wright, M.C.H. (1998)Centimeter to submillimeter total flux and polarization monitoring data are used to investigate the nature of a prominent flare in the quasar 3C 273 during 1995/6. After removal of the quiescent level, the resulting “flare ...