The Square Kilometre Array (SKA)

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A 350GHz radial-probe SIS mixer for astronomical imaging arrays

International Journal of Infrared and Millimeter Waves 22:9 (2001) 1305-1312

Authors:

S Withington, J Leech, G Yassin, KG Isaak, BD Jackson, JR Gao, TM Klapwijk

Abstract:

We have developed a 330-370GHz SIS mixer for small-format, heterodyne, astronomical imaging arrays. Fixed-tuned broadband operation is achieved by means of a superconducting radial waveguide probe. A horn-reflector antenna provides high-efficiency optical coupling. Using a variable-temperature cryogenic noise source, we measured a DSB system noise temperature of 32卤1K. The mixer contributes 3卤3K, supporting the theoretically-predicted result that the noise temperature of a DSB mixer can be less than (Latin small letter hwith stroke)蠅/2k (8.6K). 漏 2001 Plenum Publishing Corporation.

Energetics of jets from X-ray binaries

Astrophysics and Space Science Springer Nature 276:Suppl 1 (2001) 69-77

Jets in XRB Low/Hard States: Models of XTE J1118+480 Suggest a Strong Signature from Radio through X-Ray

Astrophysics and Space Science Springer Nature 276:Suppl 1 (2001) 289-290

Authors:

S Markoff, H Falcke, R Fender

The 1997 Hard State Outburst of the X-Ray Transient GS 1354-64 / BW CIR

Astrophysics and Space Science Springer Nature 276:Suppl 1 (2001) 117-120

Authors:

Catherine Brocksopp, Peter Jonker, Rob Fender, Michiel van der Klis, Paul Groot, Steven Tingay

The Continuous Jets of Cygnus X-1

Astrophysics and Space Science Springer Nature 276:Suppl 1 (2001) 255-258

Authors:

R Spencer, C de la Force, A Stirling, M Garrett, R Fender, R Ogley