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Black Hole

Lensing of space time around a black hole. At Oxford we study black holes observationally and theoretically on all size and time scales - it is some of our core work.

Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES.

Prof Michael Jones

Professor of Experimental Cosmology

Sub department

  • Astrophysics

Research groups

  • Astronomical instrumentation
  • Cosmology
  • Experimental radio cosmology
  • C-BASS
  • The Square Kilometre Array (SKA)
Mike.Jones@physics.ox.ac.uk
Telephone: 01865 (2)73441
Denys Wilkinson Building, room 758
  • About
  • Publications

The Q/U imaging experiment instrument

Astrophysical Journal American Astronomical Society 768:1 (2013) 1-28

Authors:

C Bischoff, A Brizius, I Buder, Y Chinone, K Cleary, RN Dumoulin, A Kusaka, R Monsalve, SK Naess, LB Newburgh, G Nixon, R Reeves, KM Smith, K Vanderlinde, IK Wehus, M Bogdan, R Bustos, Church, R Davis, C Dickinson, HK Eriksen, T Gaier, JO Gundersen, M Hasegawa, M Hazumi, C Holler, KM Huffenberger, WA Imbriale, K Ishidoshiro, Michael Jones, P Kangaslahti, DJ Kapner, CR Lawrence, EM Leitch, M Limon, JJ McMahon, AD Miller, M Nagai, H Nguyen, TJ Pearson, L Piccirillo, SJE Radford, ACS Readhead, JL Richards, D Samtleben, M Seiffert, MC Shepherd, ST Staggs, O Tajima

Abstract:

The Q/U Imaging ExperimenT (QUIET) is designed to measure polarization in the cosmic microwave background, targeting the imprint of inflationary gravitational waves at large angular scales(~1°). Between 2008 October and 2010 December, two independent receiver arrays were deployed sequentially on a 1.4 m side-fed Dragonian telescope. The polarimeters that form the focal planes use a compact design based on high electron mobility transistors (HEMTs) that provides simultaneous measurements of the Stokes parameters Q, U, and I in a single module. The 17-element Q-band polarimeter array, with a central frequency of 43.1 GHz, has the best sensitivity (69 μKs1/2) and the lowest instrumental systematic errors ever achieved in this band, contributing to the tensor-to-scalar ratio at r < 0.1. The 84-element W-band polarimeter array has a sensitivity of 87 μKs1/2 at a central frequency of 94.5 GHz. It has the lowest systematic errors to date, contributing at r < 0.01. The two arrays together cover multipoles in the range ℓ ~ 25-975. These are the largest HEMT-based arrays deployed to date. This article describes the design, calibration, performance, and sources of systematic error of the instrument.

More details from the publisher
Details from ORA
Details from ArXiV

A Circularly Symmetric Antenna Design With High Polarization Purity and Low Spillover

IEEE Transactions on Antennas and Propagation (2013)

Authors:

CM Holler, AC Taylor, ME Jones, OG King, SJC Muchovej, MA Stevenson, RJ Wylde, CJ Copley, RJ Davis, TJ Pearson, ACS Readhead

THE Q/U IMAGING EXPERIMENT INSTRUMENT

ASTROPHYSICAL JOURNAL 768:1 (2013) ARTN 9

Authors:

C Bischoff, A Brizius, I Buder, Y Chinone, K Cleary, RN Dumoulin, A Kusaka, R Monsalve, SK Naess, LB Newburgh, G Nixon, R Reeves, KM Smith, K Vanderlinde, IK Wehus, M Bogdan, R Bustos, SE Church, R Davis, C Dickinson, HK Eriksen, T Gaier, JO Gundersen, M Hasegawa, M Hazumi, C Holler, KM Huffenberger, WA Imbriale, K Ishidoshiro, ME Jones, P Kangaslahti, DJ Kapner, CR Lawrence, EM Leitch, M Limon, JJ McMahon, AD Miller, M Nagai, H Nguyen, TJ Pearson, L Piccirillo, SJE Radford, ACS Readhead, JL Richards, D Samtleben, M Seiffert, MC Shepherd, ST Staggs, O Tajima, KL Thompson, R Williamson, B Winstein, EJ Wollack, JTL Zwart
More details from the publisher

The first billion years: report of a study program

(2012)

Authors:

J Bowman, S Furlanetto, D Jones, A Readhead, Y Ali-Hamimoud, J Bock, G Bower, M Bradford, C Carilli, T Chang, R Chary, J Chluba, S Church, G Cotter, A Cooray, D DeBoer, A Oliveira-Costa, R Dean, O Dore, T Gaier, K Grainge, J Gunderson, C Hirata, ME Jones, G Keating, C Lawrence, L Levenson, J lazio, P Lubin, T Pearson, J Pritchard, A Pullen, S Rawlings, D Reichers, L Samoska, M Seiffert, AC Taylor

SECOND SEASON QUIET OBSERVATIONS: MEASUREMENTS OF THE COSMIC MICROWAVE BACKGROUND POLARIZATION POWER SPECTRUM AT 95 GHz

ASTROPHYSICAL JOURNAL 760:2 (2012) ARTN 145

Authors:

D Araujo, C Bischoff, A Brizius, I Buder, Y Chinone, K Cleary, RN Dumoulin, A Kusaka, R Monsalve, S Kaess, LB Newburgh, R Reeves, IK Wehus, JTL Zwart, L Bronfman, R Bustos, SE Church, C Dickinson, HK Eriksen, T Gaier, JO Gundersen, M Hasegawa, M Hazumi, KM Huffenberger, K Ishidoshiro, ME Jones, P Kangaslahti, DJ Kapner, D Kubik, CR Lawrence, M Limon, JJ McMahon, AD Miller, M Nagai, H Nguyen, G Nixon, TJ Pearson, L Piccirillo, SJE Radford, ACS Readhead, JL Richards, D Samtleben, M Seiffert, MC Shepherd, KM Smith, ST Staggs, O Tajima, KL Thompson, K Vanderlinde, R Williamson
More details from the publisher

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