The Molonglo Observatory Synthesis Telescope

Mills, B. Y.

doi:10.1017/s1323358000016222

Cited by 117 publications

(56 citation statements)

References 5 publications

(6 reference statements)

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“…We suspect that spatial filtering caused by missing short spacings in the MOST observations is resulting in missing flux associated with emission on the scale of the NW relic. There is a 15-m gap at zero-spacing between the two arms of the MOST (Mills 1981), which results in emission on angular scales of ∼30 arcmin and above being poorly sampled. Our results agree with this: the 843 MHz data are able to recover the total flux density for compact sources but for emission that is on the scale of the NW relic (∼30 arcmin) there is a significant amount of missing flux.…”

Section: Integrated Flux Densities and Spectral Indicesmentioning

confidence: 99%

The First Murchison Widefield Array low-frequency radio observations of cluster scale non-thermal emission: the case of Abell 3667

Hindson¹,

Johnston‐Hollitt²,

Hurley‐Walker³

et al. 2014

Monthly Notices of the Royal Astronomical Society

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We present the first Murchison Widefield Array observations of the well-known cluster of galaxies Abell 3667 (A3667) between 105 and 241 MHz. A3667 is one of the best known examples of a galaxy cluster hosting a double radio relic and has been reported to contain a faint radio halo and bridge. The origin of radio haloes, relics and bridges is still unclear, however galaxy cluster merger seems to be an important factor. We clearly detect the north-west (NW) and south-east radio relics in A3667 and find an integrated flux density at 149 MHz of 28.1 ± 1.7 and 2.4 ± 0.1 Jy, respectively, with an average spectral index, between 120 and 1400 MHz, of −0.9 ± 0.1 for both relics. We find evidence of a spatial variation in the spectral index across the NW relic steepening towards the centre of the cluster, which indicates an ageing electron population. These properties are consistent with higher frequency observations. We detect emission that could be associated with a radio halo and bridge. However, due to the presence of poorly sampled large-scale Galactic emission and blended point sources we are unable to verify the exact nature of these features.

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Section: Integrated Flux Densities and Spectral Indicesmentioning

confidence: 99%

The First Murchison Widefield Array low-frequency radio observations of cluster scale non-thermal emission: the case of Abell 3667

Hindson¹,

Johnston‐Hollitt²,

Hurley‐Walker³

et al. 2014

Monthly Notices of the Royal Astronomical Society

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“…MOST is described by Mills (1981), Robertson (1991), and references therein. It was constructed from the 1.6 km east-west arm of the 408 MHz Molonglo Cross Telescope and modified to operate at 843 MHz with a bandwidth of 3 MHz.…”

Section: Observations At 843 Mhzmentioning

confidence: 99%

The Molonglo Southern 4 Jy Sample (MS4). I. Definition

Burgess

Hunstead

2006

Astron J

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We have defined a complete sample of 228 southern radio sources at 408 MHz with integrated flux densities S 408 > 4:0 Jy, Galactic latitude jbj > 10 , and declination À85 < < À30 . The main finding survey used was the Molonglo Reference Catalogue. We describe in detail how the Molonglo Southern 4 Jy sample (MS4) was assembled and its completeness assessed. Sources in the sample were imaged at 843 MHz with the Molonglo Observatory Synthesis Telescope to obtain positions accurate to about 1 00 , as well as flux densities and angular sizes; follow-up radio and optical observations are presented in Paper II. Radio spectra for the MS4 have been compiled from the literature and used to estimate flux densities at 178 MHz. The strong-source subset of MS4, with S 178 > 10:9 Jy (SMS4), provides a southern sample closely equivalent to the well-studied northern 3CRR sample. Comparison of SMS4 with 3CRR shows a reassuring similarity in source density and median flux density between the two samples.

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“…The observations are part of a recently completed survey of the southern Galactic plane at 0.843 GHz using the MOST (Mills 1981;Robertson 1991) that covers the region 245…”

Section: Observationsmentioning

confidence: 99%

The MOST supernova remnant catalogue (MSC)

Whiteoak

Green

1996

Astron. Astrophys. Suppl. Ser.

295

441

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Abstract. -A catalogue of supernova remnants in the southern Galaxy within the area 245• ≤ l ≤ 355• , |b| ∼ < 1.5• has been produced from observations made at 0.843 GHz with a resolution of 43 using the Molonglo Observatory Synthesis Telescope (MOST). The catalogue, presented here, provides greyscale images and contour maps of known and newly-discovered remnants. The increased resolution and sensitivity of these observations has resulted in better statistics for southern remnants.

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The Molonglo Observatory Synthesis Telescope

Cited by 117 publications

References 5 publications

The First Murchison Widefield Array low-frequency radio observations of cluster scale non-thermal emission: the case of Abell 3667

The First Murchison Widefield Array low-frequency radio observations of cluster scale non-thermal emission: the case of Abell 3667

The Molonglo Southern 4 Jy Sample (MS4). I. Definition

The MOST supernova remnant catalogue (MSC)

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