R W Hunstead

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Soft gamma-ray repeaters (SGRs) are 'magnetars', a small class of slowly spinning neutron stars with extreme surface magnetic fields, B approximately 10(15) gauss (refs 1 , 2 -3). On 27 December 2004, a giant flare was detected from the magnetar SGR 1806-20 (ref. 2), only the third such event recorded. This burst of energy was detected by a variety of(More)
Jupiter's nonthermal microwave emission, as measured by a global network of 11 radio telescopes, increased dramatically during the Shoemaker-Levy 9 impacts. The increase was wavelength-dependent, varying from approximately 10 percent at 70 to 90 centimeters to approximately 45 percent at 6 and 36 centimeters. The radio spectrum hardened (flattened toward(More)
We present an alternative interpretation of the observations of BR 1202−0725 at z = 4.695 and show that its properties are consistent with a relativistic jet, issuing from the quasar core, propagating into the inter-galactic medium and triggering star formation along its path. Prompted by this finding, we reviewed all the z > 3 objects detected in molecular(More)
This paper is the second in a series describing the Sydney University Molonglo Sky Survey (SUMSS) being carried out at 843 MHz with the Molonglo Observatory Synthesis Telescope (MOST). The survey will consist of ∼ 590 4.3 • × 4.3 • mosaic images with 45 ′′ ×45 ′′ cosec|δ| resolution, and a source catalogue. In this paper we describe the initial release(More)
  • J M Miller, J Homan, D Steeghs, M Rupen, R W Hunstead, R Wijnands +2 others
  • 2008
Subject headings: Black hole physics – relativity – stars: binaries (GX 339−4) – physical data and processes: accretion disks ABSTRACT We present the first results of coordinated multi-wavelength observations of the Galactic black hole GX 339−4 in a canonical low–hard state, obtained during its 2004 outburst. XMM-Newton observed the source for 2 revolutions(More)
This paper introduces a new program to find high-redshift radio galaxies in the southern hemisphere through ultra-steep spectrum (USS) selection. We define a sample of 234 USS radio sources with spectral indices α 843 408 ≤ −1.0 (S ν ∝ ν α) and flux densities S 408 ≥ 200 mJy in a region of 0.35 sr, chosen by cross-correlating the revised 408 MHz Molonglo(More)
Using the Australia Telescope Compact Array we have detected CO (1-0) and CO (5-4) from TN J0924–2201 at z = 5.2, the most distant radio galaxy known to date. This is the second highest redshift detection of CO published so far. The CO (1-0) is 250 − 400km s −1 wide with a peak flux density of 520 ± 115 µJy beam −1 whilst the CO (5-4) line emission is 200 −(More)
We present new arcminute resolution radio images of the low surface brightness radio source PKS B1400−33 that is located in the poor cluster Abell S753. The observations consist of 330 MHz VLA, 843 MHz MOST and 1398 and 2378 MHz ATCA data. These new images, with higher surface brightness sensitivity than previous observations, reveal that the large scale(More)