Publications


The C-Band All-Sky Survey (C-BASS): constraining diffuse Galactic radio emission in the North Celestial Pole region

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485 (2019) 2844-2860

C Dickinson, A Barr, HC Chiang, C Copley, RDP Grumitt, SE Harper, HM Heilgendorff, LRP Jew, JL Jonas, ME Jones, JP Leahy, J Leech, EM Leitch, SJC Muchovej, TJ Pearson, MW Peel, ACS Readhead, J Sievers, MA Stevenson, AC Taylor


The C-Band All-Sky Survey (C-BASS): Digital backend for the northern survey

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) (2019)

MA Stevenson, TJ Pearson, ME Jones, CJ Copley, C Dickinson, JJ John, OG King, SJC Muchovej, AC Taylor


A Compact Quad-Ridge Orthogonal Mode Transducer With Wide Operational Bandwidth

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 17 (2018) 422-425

AW Pollak, ME Jones


The C-Band All-Sky Survey (C-BASS): design and capabilities

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 480 (2018) 3224-3242

ME Jones, AC Taylor, M Aich, CJ Copley, HC Chiang, RJ Davis, C Dickinson, RDP Grumitt, Y Hafez, HM Heilgendorff, CM Holler, MO Irfan, LRP Jew, JJ John, J Jonas, OG King, JP Leahy, J Leech, EM Leitch, SJC Muchovej, TJ Pearson, MW Peel, ACS Readhead, J Sievers, MA Stevenson, J Zuntz


The STRIP instrument of the Large Scale Polarization Explorer: microwave eyes to map the Galactic polarized foregrounds

MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY IX 10708 (2018)

C Franceschet, S Realini, A Mennella, G Addamo, A Bau, PM Battaglia, M Bersanelli, B Caccianiga, S Caprioli, F Cavaliere, KA Cleary, F Cuttaia, F Del Torto, V Fafone, Z Farooqui, RTG Santos, TC Gaier, M Gervasi, T Ghigna, F Incardona, S Iovenitti, M Jones, P Kangaslahti, R Mainini, D Maino, M Maris, P Mena, R Molina, G Morgante, A Passerini, MDR Perez-de-Taoro, OA Peverini, F Pezzotta, C Pincella, N Reyes, A Rocchi, JAR Martin, M Sandri, S Sartor, M Soria, V Tapia, L Terenzi, M Tomasi, E Tommasi, DM Vigano, F Villa, G Virone, A Volpe, B Watkins, A Zacchei, M Zannoni


The State-of-Play of Anomalous Microwave Emission (AME) research

NEW ASTRONOMY REVIEWS 80 (2018) 1-28

C Dickinson, Y Ali-Haimoud, A Barr, ES Battistelli, A Bell, L Bernstein, S Casassus, K Cleary, BT Draine, R Genova-Santos, SE Harper, B Hensley, J Hill-Valler, T Hoang, FP Israel, L Jew, A Lazarian, JP Leahy, J Leech, CH Lopez-Caraballo, I McDonald, EJ Murphy, T Onaka, R Paladini, MW Peel, Y Perrott, F Poidevin, ACS Readhead, J-A Rubino-Martin, AC Taylor, CT Tibbs, M Todorovic, M Vidal


A Herschel Space Observatory Spectral Line Survey of Local Luminous Infrared Galaxies from 194 to 671 Microns

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 230 (2017) ARTN 1

N Lu, Y Zhao, T Diaz-Santos, C Kevin Xu, Y Gao, L Armus, KG Isaak, JM Mazzarella, PP van der Werf, PN Appleton, V Charmandaris, AS Evans, J Howell, K Iwasawa, J Leech, S Lord, AO Petric, GC Privon, DB Sanders, B Schulz, JA Surace


The Low Frequency Receivers for SKA1-Low: Design and Verification

2017 XXXIIND GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM OF THE INTERNATIONAL UNION OF RADIO SCIENCE (URSI GASS) (2017)

P Benthem, M Gerbers, JGB de Vaate, S Wijnholds, J Bast, T Booler, T Colgate, B Crosse, D Emrich, P Hall, B Juswardy, D Kenney, F Schlagenhaufer, M Sokolowski, A Sutinjo, D Ung, R Wayth, A Williams, M Alderighi, P Bolli, G Comoretto, A Mattana, J Monari, G Naldi, F Perini, G Pupillo, S Rusticelli, M Schiaffino, F Schilliro, A Aminei, R Chiello, M Jones, J Baker, R Bennett, R Halsall, G Kaligeridou, M Roberts, H Schnetler, J Abraham, EDL Acedo, A Faulkner, N Razavi-Ghods, D Cutajar, A DeMarco, A Magro, KZ Adami, IEEE


HIPSR: A Digital Signal Processor for the Parkes 21-cm Multibeam Receiver

Journal of Astronomical Instrumentation 5 (2016)

DC Price, L Staveley-Smith, M Bailes, E Carretti, A Jameson, ME Jones, W Van Straten, SW Schediwy

© 2016 World Scientific Publishing Company. HIPSR (HI-Pulsar) is a digital signal processing system for the Parkes 21-cm Multibeam Receiver that provides larger instantaneous bandwidth, increased dynamic range, and more signal processing power than the previous systems in use at Parkes. The additional computational capacity enables finer spectral resolution in wideband HI observations and real-time detection of Fast Radio Bursts during pulsar surveys. HIPSR uses a heterogeneous architecture, consisting of FPGA-based signal processing boards connected via high-speed Ethernet to high performance compute nodes. Low-level signal processing is conducted on the FPGA-based boards, and more complex signal processing routines are conducted on the GPU-based compute nodes. The development of HIPSR was driven by two main science goals: to provide large bandwidth, high-resolution spectra suitable for 21-cm stacking and intensity mapping experiments; and to upgrade the Berkeley-Parkes-Swinburne Recorder (BPSR), the signal processing system used for the High Time Resolution Universe (HTRU) Survey and the Survey for Pulsars and Extragalactic Radio Bursts (SUPERB).


Observations of Galactic star-forming regions with the Cosmic Background Imager at 31 GHz

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 453 (2015) 2082-2093

C Demetroullas, C Dickinson, D Stamadianos, SE Harper, K Cleary, ME Jones, TJ Pearson, ACS Readhead, AC Taylor


C-Band All-Sky Survey: a first look at the Galaxy

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 448 (2015) 3572-3586

MO Irfan, C Dickinson, RD Davies, C Copley, RJ Davis, PG Ferreira, CM Holler, JL Jonas, ME Jones, OG King, JP Leahy, J Leech, EM Leitch, SJC Muchovej, TJ Pearson, MW Peel, ACS Readhead, MA Stevenson, D Sutton, AC Taylor, J Zuntz


Testing an array of 350 GHz drilled smoothwall horns using a vector near-field beam scanner

26th International Symposium on Space Terahertz Technology, ISSTT 2015 (2015)

PK Grimes, E Tong, L Zeng, J Leech, G Yassin

We describe near-field tests and results of an 8 pixel close-packed feedhorn array that will be a key component of an 8 pixel prototype 350 GHz SIS mixer array receiver prototype under construction at SAO. We have fabricated an array of smooth walled multiple flare angle feedhorns by direct drilling into a single block of aluminum. Testing of the feedhorns was carried out using a nearfield scanner and a vector network analyzer based on custom built transmitters and receivers and an HP vector voltmeter. The vector nearfield data is transformed to the farfield radiation pattern using Python code based on the NF2FF Matlab script[1].


Automated reduction of sub-millimetre single-dish heterodyne data from the James Clerk Maxwell Telescope using ORAC-DR

Monthly Notices of the Royal Astronomical Society 453 (2015) 73-88

T Jenness, MJ Currie, RPJ Tilanus, B Cavanagh, DS Berry, J Leech, L Rizzi

© The Author 2015. With the advent of modern multidetector heterodyne instruments that can result in observations generating thousands of spectra per minute it is no longer feasible to reduce these data as individual spectra. We describe the automated data reduction procedure used to generate baselined data cubes from heterodyne data obtained at the James Clerk Maxwell Telescope (JCMT). The system can automatically detect baseline regions in spectra and automatically determine regridding parameters, all without input from a user. Additionally, it can detect and remove spectra suffering from transient interference effects or anomalous baselines. The pipeline is written as a set of recipes using the ORAC-DR pipeline environment with the algorithmic code using Starlink software packages and infrastructure. The algorithms presented here can be applied to other heterodyne array instruments and have been applied to data from historical JCMT heterodyne instrumentation.


THE Q/U IMAGING EXPERIMENT: POLARIZATION MEASUREMENTS OF THE GALACTIC PLANE AT 43 AND 95 GHz

ASTROPHYSICAL JOURNAL 811 (2015) ARTN 89

TM Ruud, U Fuskeland, IK Wehus, M Vidal, D Araujo, C Bischoff, I Buder, Y Chinone, K Cleary, RN Dumoulin, A Kusaka, R Monsalve, SK Naess, LB Newburgh, RA Reeves, JTL Zwart, L Bronfman, RD Davies, R Davis, C Dickinson, HK Eriksen, T Gaier, JO Gundersen, M Hasegawa, M Hazumi, KM Huffenberger, ME Jones, CR Lawrence, EM Leitch, M Limon, AD Miller, TJ Pearson, L Piccirillo, SJE Radford, ACS Readhead, D Samtleben, M Seiffert, MC Shepherd, ST Staggs, O Tajima, KL Thompson, QUIET Collaboration


THE Q/U IMAGING EXPERIMENT: POLARIZATION MEASUREMENTS OF RADIO SOURCES AT 43 AND 95 GHz

ASTROPHYSICAL JOURNAL 806 (2015) ARTN 112

KM Huffenberger, D Araujo, C Bischoff, I Buder, Y Chinone, K Cleary, A Kusaka, R Monsalve, SK Naess, LB Newburgh, R Reeves, TM Ruud, IK Wehus, JTL Zwart, C Dickinson, HK Eriksen, T Gaier, JO Gundersen, M Hasegawa, M Hazumi, AD Miller, SJE Radford, ACS Readhead, ST Staggs, O Tajima, KL Thompson, QUIET Collaboration


Investigating the origin of harmonics in a 230 GHz local oscillator

26th International Symposium on Space Terahertz Technology, ISSTT 2015 (2015)

A Hector, BN Ellison, G Yassin, BK Tan, J Leech

The presence of spurious frequency tones emanating from a harmonically generated local oscillator (LO) signal can significantly degrade the performance of a Superconductor-Insulator-Superconductor (SIS) tunnel junction mixer [1]. The existence of harmonics is often revealed by distorted I-V curves obtained when pumping the SIS device with the LO. We have investigated this effect by using a commercially available source and correlating the photon step induced I-V curve structure with a direct frequency measurement made via a Fourier Transform Spectrometer (FTS) and a spectrum analyser. Our results suggest that intermixing frequency products are generated within the first, low frequency, stage of the LO chain, and these unwanted signals are converted to high frequency tones through subsequent stages of LO amplification and frequency up-conversion. The experimental work has been performed by using measurement facilities available at the University of Oxford and the Rutherford Appleton Laboratory (RAL), UK.


An SIS mixer based focal-plane array at 230 GHz

26th International Symposium on Space Terahertz Technology, ISSTT 2015 (2015)

J Leech, G Yassin, BK Tan, Y Zhou, J Garrett, P Grimes

Efficiently mapping large areas of the sky with high spectral resolution at mm and sub-mm wavelengths will require a new generation of heterodyne focal-plane array receivers. The number of pixels in such arrays has not increased particularly rapidly in the last two decades, with maximum achieved pixel numbers between 16 and 64 (e.g. [1] and [2]). Thus new approaches are needed to address such problems as local oscillator (LO) injection, feed horn fabrication and SIS mixer design, fabrication and repeatability. Here we describe a prototype focal-plane array unit based on unilateral finline SIS mixers, fed with smooth-walled feed horns. LO injection power diplexing is achieved by a combination of directly machined waveguide Y-power splitters and bow-tie cross waveguide couplers. The 1×4 prototype array, currently under construction, will demonstrate several technologies relevant to the construction of large format arrays.


Astronomical receiver modelling using scattering matrices

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 446 (2015) 1252-1267

OG King, ME Jones, C Copley, RJ Davis, JP Leahy, J Leech, SJC Muchovej, TJ Pearson, AC Taylor


Astronomical receiver modelling using scattering matrices

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 446 (2015) 1252-1267

OG King, ME Jones, C Copley, RJ Davis, JP Leahy, J Leech, SJC Muchovej, TJ Pearson, AC Taylor


Instrumentation for single-dish observations with the Greenland Telescope

MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY VII 9153 (2014)

PK Grimes, K Asada, R Blundell, R Burgos, H-H Chang, MT Chen, D Goldie, C Groppi, CC Han, PTP Ho, YD Huang, M Inoue, D Kubo, P Koch, J Leech, EDL Acedo, P Martin-Cocher, H Nishioka, M Nakamura, S Matsushita, SN Paine, N Patel, P Raffin, W Snow, TK Sridharan, R Srinivasan, CN Thomas, E Tong, M-J Wang, C Wheeler, S Withington, G Yassin, L-Z Zeng

Pages