Associated absorption in radio quasars. I. C IV absorption and the growth of radio sources (2002)
Baker, Joanne C., Hunstead, Richard W., Athreya, Ramana M., Barthel, Peter D., De Silva, Eric, Lehnert, Matthew D., ...
We assess the global properties of associated C IV lambdalambda1548, 1550 absorption lines measured in the spectra of radio-loud quasars drawn from a near-complete, low-frequency selected sample. The...
Associated absorption and radio source growth (2001)
Results are presented from a survey for CIV associated absorption in a complete low-frequency-selected sample of quasars. In agreement with previous work, associated absorbers are most common in...
Tunable-filter imaging of quasar fields at z~1. I. A cluster around MRC B0450-221 (2000)
Baker, Joanne C., Hunstead, Richard W., Bremer, Malcolm N., Bland-Hawthorn, Joss, Athreya, Ramana M., Barr, Jordi
Using a combination of multicolour broad- and narrow-band imaging techniques and follow-up spectroscopy, we have detected an overdensity of galaxies in the field of quasar MRC B0450-221, whose...
Completeness and confusion in the identification of Lyman-break galaxies (1999)
Cotter, Garret, Haynes, Toby, Baker, Joanne C., Jones, Michael E., Saunders, Richard
We have carried out a study to simulate distant clusters of galaxies in deep ground-based optical images. We find that when model galaxies are added to deep images obtained with the William Herschel...
Baker, Joanne C., Grainge, Keith, Hobson, M. P., Jones, Michael E., Kneissl, R., Lasenby, A. N., ...
We describe observations at frequencies near 15 GHz of the second 2x2 degree field imaged with the Cambridge Cosmic Anisotropy Telescope (CAT). After the removal of discrete radio sources, structure...
WOMBAT & FORECAST: Making Realistic Maps of the Microwave Sky (1999)
Jaffe, Andrew H., Gawiser, Eric, Finkbeiner, Douglas, Baker, Joanne C., Balbi, Amedeo, Davis, Marc, ...
The Wavelength-Oriented Microwave Background Analysis Team (WOMBAT) is constructing microwave maps which will be more realistic than previous simulations. Our foreground models represent a...
Baker, Joanne C., Hunstead, Richard W., Kapahi, Vijay K., Subrahmanya, C. R.
Optical spectroscopic data are presented here for quasars from the Molonglo Quasar Sample (MQS), which forms part of a complete survey of 1-Jy radio sources from the Molonglo Reference Catalogue. The...
Detection of a CMB decrement towards the (1999)
Pc+ A B, Michael E. Jones, Richard Saunders, Joanne C. Baker, Garret Cotter, Alastair Edge, ...
In a 15-GHz Ryle-Telescope observation of PC1643+4631 A & B, a pair of quasars at redshifts z = 3:79 and 3.83 separated by 198 00 on the sky, we find a decrement in the cosmic microwave background...
The WOMBAT Challenge: A "Hounds and Hares" Exercise for Cosmology (1998)
Gawiser, Eric, Finkbeiner, Douglas, Jaffe, Andrew, Baker, Joanne C., Balbi, Amedeo, Davis, Marc, ...
The Wavelength-Oriented Microwave Background Analysis Team (WOMBAT) is constructing microwave skymaps which will be more realistic than previous simulations. Our foreground models represent a...
Haynes, Toby, Cotter, Garret, Baker, Joanne C., Eales, Steve, Jones, Michael E., Rawlings, Steve, ...
We present deep optical images of the PC1643+4631 field obtained at the WHT. This field contains two quasars at redshifts z=3.79 & 3.83 and a cosmic microwave background (CMB) decrement detected with...
Cotter, Garret, Haynes, Toby, Baker, Joanne C., Jones, Michael E., Saunders, Richard
In an investigation of the cause of the cosmic microwave background decrement in the field of the z = 3.8 quasar pair PC1643+4631, we have carried out a study to photometrically estimate the...
Lyman-alpha absorption : links between CSS quasars and high-redshift radio galaxies (1997)
Spectroscopy of high-redshift compact steep-spectrum (CSS) quasars shows a high incidence of Ly-alpha absorption close to the quasar redshift. Associated absorption systems like these are rare in...
Tunable filter imaging: structure forming around a quasar at z=0.9 (1997)
Preliminary results are described for emission-line imaging of the field of a quasar at z=0.9 with a unique new instrument --- the TAURUS Tunable Filter (TTF). At least fourteen [O II]-emitting...
The Radio-Optical Correlation in Steep-Spectrum Quasars (1997)
Serjeant, Stephen, Rawlings, Steve, Maddox, Stephen J., Baker, Joanne C., Clements, Dave, Lacy, Mark, ...
Using complete samples of steep-spectrum quasars, we present evidence for a correlation between radio and optical luminosity which is not caused by selection effects, nor caused by an orientation...
Detection of a CMB decrement towards the (1997)
Pc+ A B, Michael E. Jones, Richard Saunders, Joanne C. Baker, Garret Cotter, Alastair Edge, ...
In a 15-GHz Ryle-Telescope observation of PC1643+4631 A & B, a pair of quasars at redshifts z = 3:79 and 3.83 separated by 198 00 on the sky, we find a decrement in the cosmic microwave background...
Detection of a CMB decrement towards the z = 3.8 quasar pair PC1643+4631A&B (1996)
Jones, Michael E., Saunders, Richard, Baker, Joanne C., Cotter, Garret, Edge, Alastair, Grainge, Keith, ...
In a 15-GHz Ryle-Telescope observation of PC1643+4631 A & B, a pair of quasars at redshifts z = 3.79 and 3.83 separated by 198 arcsec on the sky, we find a decrement in the cosmic microwave...
Optical and infrared investigation towards the z=3.8 quasar pair PC1643+4631A&B (1996)
Saunders, Richard, Baker, Joanne C., Bremer, Malcolm N., Bunker, Andrew J., Cotter, Garret, Eales, Steve, ...
In a companion paper (Paper I: Jones et al. 1996) we report the discovery of a cosmic microwave background decrement, indicative of a distant cluster with mass ~10^{15} solar masses, towards the...
Origin of the viewing-angle dependence of the optical continuum emission in quasars (1996)
The orientation-dependence of the optical continuum emission in radio-loud quasars is investigated using a new, complete sample of low-frequency-selected quasars, the Molonglo Quasar Sample (MQS)....