Vardoulaki E.,Astrophysics |
Rawlings S.,Astrophysics |
Hill G.J.,University of Texas at Austin |
Mauch T.,Astrophysics |
And 5 more authors.
Monthly Notices of the Royal Astronomical Society | Year: 2010
We present optical spectroscopy, near-infrared (mostly K-band) and radio (151-MHz and 1.4-GHz) imaging of the first complete region (TOOT00) of the TexOx-1000 (TOOT) redshift survey of radio sources. The 0.0015-sr (∼5 deg2) TOOT00 region is selected from pointed observations of the Cambridge Low-Frequency Survey Telescope at 151 MHz at a flux density limit of ≃100 mJy, approximately five times fainter than the 7C Redshift Survey (7CRS), and contains 47 radio sources. We have obtained 40 spectroscopic redshifts (∼85 per cent completeness). Adding redshifts estimated for the seven other cases yields a median redshift zmed ∼ 1.25. We find a significant population of objects with Fanaroff-Riley type I (FRI) like radio structures at radio luminosities above both the low-redshift FRI/II break and the break in the radio luminosity function. The redshift distribution and subpopulations of TOOT00 are broadly consistent with extrapolations from the 7CRS/6CE/3CRR data sets underlying the SKADS Simulated Skies Semi-Empirical Extragalactic Data base, S3-SEX. © 2009 RAS.
Oudmaijer R.,University of Leeds |
Haniff C.,Cavendish Astrophysics |
Buscher D.,Cavendish Astrophysics |
Young J.,Cavendish Astrophysics
Astronomy and Geophysics | Year: 2012
René Oudmaijer, Chris Haniff, David Buscher and John Young examine developments in optical interferometry that have brought the technique into mainstream observing. © 2012 Royal Astronomical Society.