The discovery of a typical radio galaxy at z = 4.88 (2009)
Jarvis, Matt J., Teimourian, Hanifa, Simpson, Chris, Smith, Daniel J. B., Rawlings, Steve, Bonfield, David
In this letter we report the discovery of a z=4.88 radio galaxy discovered with a new technique which does not rely on pre-selection of a sample based on radio properties such as steep-spectral index...
Carter, David, Smith, Daniel J. B., Percival, Susan M., Baldry, Ivan K., Collins, Christopher A., James, Philip A., ...
We present a comprehensive analysis of the ability of current stellar population models to reproduce the optical (ugriz) and near infra-red (JHK) colours of a small sample of well-studied nearby...
Evidence of a link between the evolution of clusters and their AGN fraction (2009)
Van Breukelen, Caroline, Simpson, Chris, Rawlings, Steve, Akiyama, Masayuki, Bonfield, David, Clewley, Lee, ...
We discuss the optical properties, X-ray detections and active galactic nucleus (AGN) populations of four clusters at z ~ 1 in the Subaru–XMM Deep Field (SXDF). The velocity distribution and...
Evidence of a link between the evolution of clusters and their AGN fraction (2009)
Van Breukelen, Caroline, Simpson, Chris, Rawlings, Steve, Akiyama, Masayuki, Bonfield, David, Clewley, Lee, ...
We discuss the optical properties, X-ray detections, and Active Galactic Nucleus (AGN) populations of four clusters at z ~ 1 in the Subaru-XMM Deep Field (SXDF). The velocity distribution and...
An 80-kpc Lyman-alpha halo around a high redshift type-2 QSO (2008)
Smith, Daniel J. B., Jarvis, Matt J., Simpson, Chris, Martinez-Sansigre, Alejo
We announce the discovery of an extended emission line region associated with a high redshift type-2 QSO. The halo, which was discovered in our new wide-field narrow-band survey, resides at z = 2.85...
The UKIRT Infrared Deep Sky Survey and the search for the most distant quasars (2008)
Mortlock, Daniel J., Patel, Mitesh, Warren, Stephen J., Venemans, Bram P., McMahon, Richard G., Hewett, Paul, ...
The UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) has the necessary combination of filters (Y, J, H and K), depth (Y ~ 6.4 quasars. The Third Data Release (DR3) included ~1000 deg^2...
The Subaru/XMM-Newton Deep Survey (SXDS): III. X-Ray Data (2008)
Ueda, Yoshihiro, Watson, Michael G., Stewart, Ian M., Akiyama, Masayuki, Schwope, Axel D., Lamer, Georg, ...
We present the X-ray source catalog in the Subaru/XMM-Newton deep survey. A continuous area of 1.14 deg^2 centered at R.A. = 02h18m and Dec. = -05d is mapped by seven pointings with XMM-Newton...
Centre for Computing and Social Responsibility, (2008)
Simon Rogerson, John Weckert, Chris Simpson
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The Subaru/XMM-Newton Deep Survey (SXDS) - III. X-ray data (2008)
Ueda, Yoshihiro, Watson, Michael G., Stewart, Ian M., Akiyama, Masayuki, Schwope, Axel D., Lamer, Georg, ...
Spectroscopic follow-up of a cluster candidate at z=1.45 (2007)
Van Breukelen, Caroline, Cotter, Garret, Rawlings, Steve, Readhead, Tony, Bonfield, David, Clewley, Lee, ...
We have obtained deep optical spectroscopic data of the highest-redshift cluster candidate (z ~ 1.4, CVB13) selected by Van Breukelen et al. in a photometric optical/infrared catalogue of the Subaru...
Molecular Hydrogen and Paschen-alpha Emission in Cooling Flow Galaxies (2007)
Heino Falcke, M. J. Rieke, G. H. Rieke, Chris Simpson, Andrew S. Wilson
We present near-infrared spectra obtained to search for Paff and molecular hydrogen lines in edge-darkened (FR I-type) radio galaxies with bright Hff emission in the redshift range 0:0535! z! 0:15....
Helical Strands in the Jet-like Narrow Line Region of ESO 428-G14 (2007)
Heino Falcke, Andrew S. Wilson, Chris Simpson, Gary A. Bower
We present HST/WFPC2 images of the narrow line region (NLR) of the Seyfert 2 galaxy ESO 428-G14 (0714-2914, M4-1). The NLR consists of many individual, thin strands, which are very closely related to...
The extended emission line region of the Seyfert galaxy Markarian 573 (2007)
Pierre Ferruit, Andrew S. Wilson, Heino Falcke, Chris Simpson, Florence Durret
We present the results of observations of the extended emission-line region of the Seyfert 2 galaxy Mrk 573, obtained using the WFPC2 camera on board HST and the TIGER integral field spectrograph on...
Chris Simpson, Peter Eisenhardt, Lee Armus, Arati Chokshi, Mark Dickinson, G. Djorgovski, ...
Young stars and non-stellar emission in the aligned radio galaxy
Accretion indicators for the 37 brightest radio sources in the Subaru/XMM-Newton Deep Field (2007)
Vardoulaki, Eleni, Rawlings, Steve, Simpson, Chris
We study the 37 brightest radio sources in the Subaru/XMM-Newton Deep Field (SXDF). Using mid-IR (Spitzer MIPS 24 micron) data we expect to trace nuclear accretion activity, even if it is obscured at...
The SCUBA half degree extragalactic survey – IV. Radio–mm–FIR photometric redshifts (2007)
Aretxaga, Itziar, Hughes, David H., Coppin, Kristen, Mortier, Angela M. J., Wagg, Jeff, Dunlop, James S., ...
We present the redshift distribution of the Submillimetre Common-User Bolometer Array (SCUBA) Half Degree Survey (SHADES) galaxy population based on the rest-frame radio–mm–far-infrared (FIR)...
Ouchi, Masami, Shimasaku, Kazuhiro, Akiyama, Masayuki, Simpson, Chris, Saito, Tomoki, Ueda, Yoshihiro, ...
We present luminosity functions (LFs) and various properties of Lya emitters (LAEs) at z=3.1, 3.7, and 5.7, in a 1 deg^2 sky of the Subaru/XMM-Newton Deep Survey (SXDS) Field. We obtain a photometric...
The SCUBA HAlf Degree Extragalactic Survey (SHADES) - IV: Radio-mm-FIR photometric redshifts (2007)
Aretxaga, Itziar, Hughes, David H., Coppin, Kristen, Mortier, Angela M. J., Wagg, Jeff, Dunlop, James S., ...
We present the redshift distribution of the SHADES galaxy population based on the rest-frame radio-mm-FIR colours of 120 robustly detected 850um sources in the Lockman Hole East (LH) and Subaru...
Evidence for a large fraction of Compton-thick quasars at high redshift (2007)
Martínez-Sansigre, Alejo, Rawlings, Steve, Bonfield, David G., Mateos, Silvia, Simpson, Chris, Watson, Mike, ...
Using mid-infrared and radio selection criteria, we pre-select a sample of candidate high-redshift type 2 quasars in the Subaru XMM-Newton Deep Field (SXDF). To filter out starburst contaminants, we...
Evidence for a large fraction of Compton-thick quasars at high redshift (2006)
Martinez-Sansigre, Alejo, Rawlings, Steve, Bonfield, David G., Mateos, Silvia, Simpson, Chris, Watson, Mike, ...
Using mid-infrared and radio selection criteria, we pre-select a sample of candidate high-redshift type-2 quasars in the Subaru XMM-Newton Deep Field (SXDF). To filter out starburst contaminants, we...
Cruz, Maria J., Jarvis, Matt J., Blundell, Katherine M., Rawlings, Steve, Croft, Steve, Kloeckner, Hans-Rainer, ...
We present basic observational data on the 6C** sample. This is a new sample of radio sources drawn from the 151 MHz 6C survey, which was filtered with radio criteria chosen to optimize the chances...
Simpson, Chris, Martinez-Sansigre, Alejo, Rawlings, Steve, Ivison, Rob, Akiyama, Masayuki, Sekiguchi, Kazuhiro, ...
We describe deep radio imaging at 1.4-GHz of the 1.3 square degree Subaru/XMM-Newton Deep Field (SXDF), made with the Very Large Array in B and C configurations. We present a radio map of the entire...
A population of high-redshift type 2 quasars – I. Selection criteria and optical spectra (2006)
Martínez-Sansigre, Alejo, Rawlings, Steve, Lacy, Mark, Fadda, Dario, Jarvis, Matt J., Marleau, Francine R., ...
We discuss the relative merits of mid-infrared and X-ray selection of type 2 quasars. We describe the mid-infrared, near-infrared and radio selection criteria used to find a population of redshift...
A population of high-redshift type-2 quasars-I. Selection Criteria and Optical Spectra (2006)
Martinez-Sansigre, Alejo, Rawlings, Steve, Lacy, Mark, Fadda, Dario, Jarvis, Matt J., Marleau, Francine R., ...
We discuss the relative merits of mid-infrared and X-ray selection of type-2 quasars. We describe the mid-infrared, near-infrared and radio selection criteria used to find a population of redshift...
A population of high-redshift type-2 quasars-I. Selection Criteria and Optical Spectra (2006)
Alejo Martínez-sansigre, Steve Rawlings, Mark Lacy, Dario Fadda, Matt J. Jarvis, Francine R. Marleau, ...
For a long time, a population of obscured (type-2) radioquiet quasars has been postulated from modelling the hard (energies � 1 keV) X-ray background as the sum of the emission from extragalactic...
Current performance and on-going improvements of the 8.2 m Subaru Telescope (2004)
Iye, Masanori, Karoji, Hiroshi, Ando, Hiroyasu, Kaifu, Norio, Kodaira, Keiichi, Aoki, Kentaro, ...
An overview of the current status of the 8.2m Subaru Telescope constructed and operated at Mauna Kea, Hawaii, by the National Astronomical Observatory of Japan is presented. The basic design concept...
Doing ethics: a universal technique in an accessibility context (2003)
Simpson, Chris, Nevile, Liddy, Burmeister, Oliver K.
Thinking ethically is difficult without a background in moral philosophy. Asking people to embrace ethics without offering practical explanation of the efficacy of so doing, is a thankless task. A...
Doing ethics: a universal technique in an accessibility context (2003)
Simpson, Chris, Nevile, Liddy, Burmeister, Oliver K.
Thinking ethically is difficult without a background in moral philosophy. Asking people to embrace ethics without offering practical explanation of the efficacy of so doing, is a thankless task. A...
Doing ethics: a universal technique in an accessibility context (2003)
Simpson, Chris, Nevile, Liddy, Burmeister, Oliver K.
Thinking ethically is difficult without a background in moral philosophy. Asking people to embrace ethics without offering practical explanation of the efficacy of so doing, is a thankless task. A...
Doing ethics: a universal technique in an accessibility context (2003)
Simpson, Chris, Nevile, Liddy, Burmeister, Oliver K.
Thinking ethically is difficult without a background in moral philosophy. Asking people to embrace ethics without offering practical explanation of the efficacy of so doing, is a thankless task. A...
It Takes More Than Ethics (2001)
Recent positive developments in ethical outlook are explored, initially within the Information and Communication Technology (ICT) profession, and then broadened into other disciplines and the...
It Takes More Than Ethics (2001)
Recent positive developments in ethical outlook are explored, initially within the Information and Communication Technology (ICT) profession, and then broadened into other disciplines and the...
Wang, Zhongxiang, Chakrabarty, Deepto, Roche, Paul, Charles, Philip A., Kuulkers, Erik, Shahbaz, Tariq, ...
We present multiband optical/IR photometry of V4580 Sgr, the optical counterpart of the accretion-powered millisecond pulsar SAX J1808.4-3658, taken during the 1998 X-ray outburst of the system. The...
Wang, Zhongxiang, Chakrabarty, Deepto, Roche, Paul, Charles, Philip A., Kuulkers, Erik, Shahbaz, Tariq, ...
We present multiband optical/IR photometry of V4580 Sgr, the optical counterpart of the accretion-powered millisecond pulsar SAX J1808.4-3658, taken during the 1998 X-ray outburst of the system. The...
Wang, Zhongxiang, Chakrabarty, Deepto, Roche, Paul, Charles, Philip A., Kuulkers, Erik, Shahbaz, Tariq, ...
We present multiband optical/IR photometry of V4580 Sgr, the optical counterpart of the accretion-powered millisecond pulsar SAX J1808.4-3658, taken during the 1998 X-ray outburst of the system. The...
Wang, Zhongxiang, Chakrabarty, Deepto, Roche, Paul, Charles, Philip A., Kuulkers, Erik, Shahbaz, Tariq, ...
We present multiband optical/IR photometry of V4580 Sgr, the optical counterpart of the accretion-powered millisecond pulsar SAX J1808.4-3658, taken during the 1998 X-ray outburst of the system. The...
Heino Falcke, Andrew S. Wilson, Chris Simpson
We present HST/WFPC2 images, in narrow-band filters containing the [O III] 5007 and Hff+[N II] emissionlines and their adjacent continua, of a sample of seven Seyfert 2 galaxies selected on the basis...