Search

Your search keyword '"Fanaroff, B."' showing total 31 results
Start Over Author "Fanaroff, B."
31 results on '"Fanaroff, B."'

1. The SARAO MeerKAT 1.3 GHz Galactic Plane Survey

Author

Goedhart, S., Cotton, W. D., Camilo, F., Thompson, M. A., Umana, G., Bietenholz, M., Woudt, P. A., Anderson, L. D., Bordiu, C., Buckley, D. A. H., Buemi, C. S., Bufano, F., Cavallaro, F., Chen, H., Chibueze, J. O., Egbo, D., Frank, B. S., Hoare, M. G., Ingallinera, A., Irabor, T., Kraan-Korteweg, R. C., Kurapati, S., Leto, P., Loru, S., Mutale, M., Obonyo, W. O., Plavin, A., Rajohnson, S. H. A., Rigby, A., Riggi, S., Seidu, M., Serra, P., Smart, B. M., Stappers, B. W., Steyn, N., Surnis, M., Trigilio, C., Williams, G. M., Abbott, T. D., Adam, R. M., Asad, K. M. B., Baloyi, T., Bauermeister, E. F., Bennet, T. G. H., Bester, H., Botha, A. G., Brederode, L. R. S., Buchner, S., Burger, J. P., Cheetham, T., Cloete, K., de Villiers, M. S., de Villiers, D. I. L., Toit, L. J. du, Esterhuyse, S. W. P., Fanaroff, B. L., Fourie, D. J., Gamatham, R. R. G., Gatsi, T. G., Geyer, M., Gouws, M., Gumede, S. C., Heywood, I., Hokwana, A., Hoosen, S. W., Horn, D. M., Horrell, L. M. G., Hugo, B. V., Isaacson, A. I., Józsa, G. I. G., Jonas, J. L., Jordaan, J. D. B. L., Joubert, A. F., Julie, R. P. M., Kapp, F. B., Kriek, N., Kriel, H., Krishnan, V. K., Kusel, T. W., Legodi, L. S., Lehmensiek, R., Lord, R. T., Macfarlane, P. S., Magnus, L. G., Magozore, C., Main, J. P. L., Malan, J. A., Manley, J. R., Marais, S. J., Maree, M. D. J., Martens, A., Maruping, P., McAlpine, K., Merry, B. C., Mgodeli, M., Millenaar, R. P., Mokone, O. J., Monama, T. E., New, W. S., Ngcebetsha, B., Ngoasheng, K. J., Nicolson, G. D., Ockards, M. T., Oozeer, N., Passmoor, S. S., Patel, A. A., Peens-Hough, A., Perkins, S. J., Ramaila, A. J. T., Ratcliffe, S. M., Renil, R., Richter, L. L., Salie, S., Sambu, N., Schollar, C. T. G., Schwardt, L. C., Schwartz, R. L., Serylak, M., Siebrits, R., Sirothia, S. K., Slabber, M. J., Smirnov, O. M., Tiplady, A. J., van Balla, T. J., van der Byl, A., Van Tonder, V., Venter, A. J., Venter, M., Welz, M. G., and Williams, L. P.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We present the SARAO MeerKAT Galactic Plane Survey (SMGPS), a 1.3 GHz continuum survey of almost half of the Galactic Plane (251\deg $\le l \le$ 358\deg and 2\deg $\le l \le$ 61\deg at $|b| \le 1.5\deg $). SMGPS is the largest, most sensitive and highest angular resolution 1 GHz survey of the Plane yet carried out, with an angular resolution of 8" and a broadband RMS sensitivity of $\sim$10--20 $\mu$ Jy/beam. Here we describe the first publicly available data release from SMGPS which comprises data cubes of frequency-resolved images over 908--1656 MHz, power law fits to the images, and broadband zeroth moment integrated intensity images. A thorough assessment of the data quality and guidance for future usage of the data products are given. Finally, we discuss the tremendous potential of SMGPS by showcasing highlights of the Galactic and extragalactic science that it permits. These highlights include the discovery of a new population of non-thermal radio filaments; identification of new candidate supernova remnants, pulsar wind nebulae and planetary nebulae; improved radio/mid-IR classification of rare Luminous Blue Variables and discovery of associated extended radio nebulae; new radio stars identified by Bayesian cross-matching techniques; the realisation that many of the largest radio-quiet WISE HII region candidates are not true HII regions; and a large sample of previously undiscovered background HI galaxies in the Zone of Avoidance., Comment: Accepted for publication in MNRAS. The data release is live and links can be found in the Data Availability Statement in the paper

Published
2023

2. The 1.28 GHz MeerKAT Galactic Center Mosaic

Author

Heywood, I., Rammala, I., Camilo, F., Cotton, W. D., Yusef-Zadeh, F., Abbott, T. D., Adam, R. M., Adams, G., Aldera, M. A., Asad, K. M. B., Bauermeister, E. F., Bennett, T. G. H., Bester, H. L., Bode, W. A., Botha, D. H., Botha, A. G., Brederode, L. R. S., Buchner, S., Burger, J. P., Cheetham, T., de Villiers, D. I. L., Dikgale-Mahlakoana, M. A., Toit, L. J. du, Esterhuyse, S. W. P., Fanaroff, B. L., February, S., Fourie, D. J., Frank, B. S., Gamatham, R. R. G., Geyer, M., Goedhart, S., Gouws, M., Gumede, S. C., Hlakola, M. J., Hokwana, A., Hoosen, S. W., Horrell, J. M. G., Hugo, B., Isaacson, A. I., Józsa, G. I. G., Jonas, J. L., Joubert, A. F., Julie, R. P. M., Kapp, F. B., Kenyon, J. S., Kotzé, P. P. A., Kriek, N., Kriel, H., Krishnan, V. K., Lehmensiek, R., Liebenberg, D., Lord, R. T., Lunsky, B. M., Madisa, K., Magnus, L. G., Mahgoub, O., Makhaba, A., Makhathini, S., Malan, J. A., Manley, J. R., Marais, S. J., Martens, A., Mauch, T., Merry, B. C., Millenaar, R. P., Mnyandu, N., Mokone, O. J., Monama, T. E., Mphego, M. C., New, W. S., Ngcebetsha, B., Ngoasheng, K. J., Ockards, M. T., Oozeer, N., Otto, A. J., Passmoor, S. S., Patel, A. A., Peens-Hough, A., Perkins, S. J., Ramaila, A. J. T., Ramanujam, N. M. R., Ramudzuli, Z. R., Ratcliffe, S. M., Robyntjies, A., Salie, S., Sambu, N., Schollar, C. T. G., Schwardt, L. C., Schwartz, R. L., Serylak, M., Siebrits, R., Sirothia, S. K., Slabber, M., Smirnov, O. M., Sofeya, L., Taljaard, B., Tasse, C., Tiplady, A. J., Toruvanda, O., Twum, S. N., van Balla, T. J., van der Byl, A., van der Merwe, C., Van Tonder, V., Van Wyk, R., Venter, A. J., Venter, M., Wallace, B. H., Welz, M. G., Williams, L. P., and Xaia, B.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

The inner $\sim$200 pc region of the Galaxy contains a 4 million M$_{\odot}$ supermassive black hole (SMBH), significant quantities of molecular gas, and star formation and cosmic ray energy densities that are roughly two orders of magnitude higher than the corresponding levels in the Galactic disk. At a distance of only 8.2 kpc, the region presents astronomers with a unique opportunity to study a diverse range of energetic astrophysical phenomena, from stellar objects in extreme environments, to the SMBH and star-formation driven feedback processes that are known to influence the evolution of galaxies as a whole. We present a new survey of the Galactic center conducted with the South African MeerKAT radio telescope. Radio imaging offers a view that is unaffected by the large quantities of dust that obscure the region at other wavelengths, and a scene of striking complexity is revealed. We produce total intensity and spectral index mosaics of the region from 20 pointings (144 hours on-target in total), covering 6.5 square degrees with an angular resolution of 4$"$,at a central frequency of 1.28 GHz. Many new features are revealed for the first time due to a combination of MeerKAT's high sensitivity, exceptional $u,v$-plane coverage, and geographical vantage point. We highlight some initial survey results, including new supernova remnant candidates, many new non-thermal filament complexes, and enhanced views of the Radio Arc Bubble, Sgr A and Sgr B regions. This project is a SARAO public legacy survey, and the image products are made available with this article., Comment: 29 pages, 15 figures, 3 tables, accepted for publication in the The Astrophysical Journal. Replacement arXiv version with higher quality figures

Published
2022
Full Text
View/download PDF

3. The MeerKAT Galaxy Cluster Legacy Survey I. Survey Overview and Highlights

Author

Knowles, K., Cotton, W. D., Rudnick, L., Camilo, F., Goedhart, S., Deane, R., Ramatsoku, M., Bietenholz, M. F., Brüggen, M., Button, C., Chen, H., Chibueze, J. O., Clarke, T. E., de Gasperin, F., Ianjamasimanana, R., Józsa, G. I. G., Hilton, M., Kesebonye, K. C., Kolokythas, K., Kraan-Korteweg, R. C., Lawrie, G., Lochner, M., Loubser, S. I., Marchegiani, P., Mhlahlo, N., Moodley, K., Murphy, E., Namumba, B., Oozeer, N., Parekh, V., Pillay, D. S., Passmoor, S. S., Ramaila, A. J. T., Ranchod, S., Retana-Montenegro, E., Sebokolodi, L., Sikhosana, S. P., Smirnov, O., Thorat, K., Venturi, T., Abbott, T. D., Adam, R. M., Adams, G., Aldera, M. A., Bauermeister, E. F., Bennett, T. G. H., Bode, W. A., Botha, D. H., Botha, A. G., Brederode, L. R. S., Buchner, S., Burger, J. P., Cheetham, T., de Villiers, D. I. L., Dikgale-Mahlakoana, M. A., Toit, L. J. du, Esterhuyse, S. W. P., Fadana, G., Fanaroff, B. L., Fataar, S., Foley, A. R., Fourie, D. J., Frank, B. S., Gamatham, R. R. G., Gatsi, T. G., Geyer, M., Gouws, M., Gumede, S. C., Heywood, I., Hlakola, M. J., Hokwana, A., Hoosen, S. W., Horn, D. M., Horrell, J. M. G., Hugo, B. V., Isaacson, A. R., Jonas, J. L., Jordaan, J. D. B., Joubert, A. F., Julie, R. P. M., Kapp, F. B., Kasper, V. A., Kenyon, J. S., Kotzé, P. P. A., Kotze, A. G., Kriek, N., Kriel, H., Krishnan, V. K., Kusel, T. W., Legodi, L. S., Lehmensiek, R., Liebenberg, D., Lord, R. T., Lunsky, B. M., Madisa, K., Magnus, L. G., Main, J. P. L., Makhaba, A., Makhathini, S., Malan, J. A., Manley, J. R., Marais, S. J., Maree, M. D. J., Martens, A., Mauch, T., McAlpine, K., Merry, B. C., Millenaar, R. P., Mokone, O. J., Monama, T. E., Mphego, M. C., New, W. S., Ngcebetsha, B., Ngoasheng, K. J., Ockards, M. T., Otto, A. J., Patel, A. A., Peens-Hough, A., Perkins, S. J., Ramanujam, N. M., Ramudzuli, Z. R., Ratcliffe, S. M., Renil, R., Robyntjies, A., Rust, A. N., Salie, S., Sambu, N., Schollar, C. T. G., Schwardt, L. C., Schwartz, R. L., Serylak, M., Siebrits, R., Sirothia, S. K., Slabber, M., Sofeya, L., Taljaard, B., Tasse, C., Tiplady, A. J., Toruvanda, O., Twum, S. N., van Balla, T. J., van der Byl, A., van der Merwe, C., van Dyk, C. L., Van Tonder, V., Van Wyk, R., Venter, A. J., Venter, M., Welz, M. G., Williams, L. P., and Xaia, B.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

MeerKAT's large number of antennas, spanning 8 km with a densely packed 1 km core, create a powerful instrument for wide-area surveys, with high sensitivity over a wide range of angular scales. The MeerKAT Galaxy Cluster Legacy Survey (MGCLS) is a programme of long-track MeerKAT L-band (900-1670 MHz) observations of 115 galaxy clusters, observed for $\sim$6-10 hours each in full polarisation. The first legacy product data release (DR1), made available with this paper, includes the MeerKAT visibilities, basic image cubes at $\sim$8" resolution, and enhanced spectral and polarisation image cubes at $\sim$8" and 15" resolutions. Typical sensitivities for the full-resolution MGCLS image products are $\sim$3-5 {\mu}Jy/beam. The basic cubes are full-field and span 4 deg^2. The enhanced products consist of the inner 1.44 deg^2 field of view, corrected for the primary beam. The survey is fully sensitive to structures up to $\sim$10' scales and the wide bandwidth allows spectral and Faraday rotation mapping. HI mapping at 209 kHz resolution can be done at $0

Published
2021
Full Text
View/download PDF

4. A new look at old friends. I. Imaging classical radio galaxies with uGMRT and MeerKAT

Author

Fanaroff, B., Lal, D. V., Venturi, T., Smirnov, O., Bondi, M., Thorat, K., Bester, L., Jozsa, G., Kleiner, D., Loi, F., Makhathini, S., and White, S. V.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We have undertaken a systematic study of FRI and FRII radio galaxies with the upgraded Giant Metrewave Radio Telescope (uGMRT) and MeerKAT. The main goal is to explore whether the unprecedented few $\mu$Jy sensitivity reached in the range 550-1712 MHz at the resolution of $\sim4^{\prime\prime}-7^{\prime\prime}$ reveals new features in the radio emission which might need us to revise our current classification scheme for classical radio galaxies. In this paper we present the results for the first set of four radio galaxies, i.e. 4C 12.02, 4C 12.03, CGCG 044-046 and CGCG 021-063. The sources have been selected from the 4C sample with well-defined criteria, and have been imaged with the uGMRT in the range 550-850 MHz (band 4) and with the MeerKAT in the range 856-1712 MHz (L-band). Full resolution images are presented for all sources in the sample, together with MeerKAT in-band spectral images. Additionally, the uGMRT-MeerKAT spectral image and MeerKAT L-band polarisation structure are provided for CGCG 044-046. Our images contain a wealth of morphological details, such as filamentary structure in the emission from the lobes, radio emission beyond the hot-spots in three sources, and misalignments. We briefly discuss the overall properties of CGCG 044-046 in the light of the local environment as well, and show possible restarted activity in 4C 12.03 which needs to be confirmed. We conclude that at least for the sources presented here, the classical FRI/FRII morphological classification still holds with the current improved imaging capabilities, but the richness in details also suggests caution in the systematic morphological classification carried out with automatic procedures in surveys with poorer sensitivity and angular resolution., Comment: 16 pages, 8 figures, and 3 tables; accepted for publication in MNRAS

Published
2021
Full Text
View/download PDF

5. Hydrodynamical Backflow in X-shaped Radio Galaxy PKS 2014-55

Author

Cotton, W. D., Thorat, K., Condon, J. J., Frank, B . S., Józsa, G . I. G., White, S. V., Deane, R ., Oozeer, N., Atemkeng, M., Bester, L., Fanaroff, B., Kupa, R. S., Smirnov, O. M., Mauch, T., Krishnan, V., and Camilo, F.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We present MeerKAT 1.28 GHz total-intensity, polarization, and spectral-index images covering the giant (projected length $l \approx 1.57$~Mpc) X-shaped radio source PKS~2014$-$55 with an unprecedented combination of brightness sensitivity and angular resolution. They show the clear "double boomerang" morphology of hydrodynamical backflows from the straight main jets deflected by the large and oblique hot-gas halo of the host galaxy PGC~064440. The magnetic field orientation in PKS~2014$-$55 follows the flow lines from the jets through the secondary wings. The radio source is embedded in faint ($T_\mathrm{b} \approx 0.5 \mathrm{\,K}$) cocoons having the uniform brightness temperature and sharp outer edges characteristic of subsonic expansion into the ambient intra-group medium. The position angle of the much smaller ($l \sim 25$~kpc) restarted central source is within $5^\circ$ of the main jets, ruling out models that invoke jet re-orientation or two independent jets. Compression and turbulence in the backflows probably produce the irregular and low polarization bright region behind the apex of each boomerang as well as several features in the flow with bright heads and dark tails., Comment: 13 pages, 11 figures

Published
2020
Full Text
View/download PDF

6. The 1.28 GHz MeerKAT DEEP2 Image

Author

Mauch, T., Cotton, W. D., Condon, J. J., Matthews, A. M., Abbott, T. D., Adam, R. M., Aldera, M. A., Asad, K. M. B., Bauermeister, E. F., Bennett, T. G. H., Bester, H., Botha, D. H., Brederode, L. R. S., Brits, Z. B., Buchner, S. J., Burger, J. P., Camilo, F., Chalmers, J. M., Cheetham, T., de Villiers, D., de Villiers, M. S., Dikgale-Mahlakoana, M. A., Toit, L. J. du, Esterhuyse, S. W. P., Fadana, G., Fanaroff, B. L., Fataar, S., February, S., Frank, B. S., Gamatham, R. R. G., Geyer, M., Goedhart, S., Gounden, S., Gumede, S. C., Heywood, I., Hlakola, M. J., Horrell, J. M. G., Hugo, B., Isaacson, A. R., Józsa, G. I. G., Jonas, J. L., Julie, R. P. M., Kapp, F. B., Kasper, V. A., Kenyon, J. S., Kotzé, P. P. A., Kriek, N., Kriel, H., Kusel, T. W., Lehmensiek, R., Loots, A., Lord, R. T., Lunsky, B. M., Madisa, K., Magnus, L. G., Main, J. P. L., Malan, J. A., Manley, J. R., Marais, S. J., Martens, A., Merry, B., Millenaar, R., Mnyandu, N., Moeng, I. P. T., Mokone, O. J., Monama, T. E., Mphego, M. C., New, W. S., Ngcebetsha, B., Ngoasheng, K. J., Ockards, M. T. O., Oozeer, N., Otto, A. J., Patel, A. A., Peens-Hough, A., Perkins, S. J., Ramaila, A. J. T., Ramudzuli, Z. R., Renil, R., Richter, L. L., Robyntjies, A., Salie, S., Schollar, C. T. G., Schwardt, L. C., Serylak, M., Siebrits, R., Sirothia, S. K., Smirnov, O. M., Sofeya, L., Stone, G., Taljaard, B., Tasse, C., Theron, I. P., Tiplady, A. J., Toruvanda, O., Twum, S. N., van Balla, T. J., van der Byl, A., van der Merwe, C., Van Tonder, V., Wallace, B. H., Welz, M. G., Williams, L. P., and Xaia, B.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We present the confusion-limited 1.28 GHz MeerKAT DEEP2 image covering one $\approx 68'$ FWHM primary beam area with $7.6''$ FWHM resolution and $0.55 \pm 0.01$ $\mu$Jy/beam rms noise. Its J2000 center position $\alpha=04^h 13^m 26.4^s$, $\delta=-80^\circ 00' 00''$ was selected to minimize artifacts caused by bright sources. We introduce the new 64-element MeerKAT array and describe commissioning observations to measure the primary beam attenuation pattern, estimate telescope pointing errors, and pinpoint $(u,v)$ coordinate errors caused by offsets in frequency or time. We constructed a 1.4 GHz differential source count by combining a power-law count fit to the DEEP2 confusion $P(D)$ distribution from $0.25$ to $10$ $\mu$Jy with counts of individual DEEP2 sources between $10$ $\mu$Jy and $2.5$ mJy. Most sources fainter than $S \sim 100$ $\mu$Jy are distant star-forming galaxies obeying the FIR/radio correlation, and sources stronger than $0.25$ $\mu$Jy account for $\sim93\%$ of the radio background produced by star-forming galaxies. For the first time, the DEEP2 source count has reached the depth needed to reveal the majority of the star formation history of the universe. A pure luminosity evolution of the 1.4 GHz local luminosity function consistent with the Madau & Dickinson (2014) model for the evolution of star-forming galaxies based on UV and infrared data underpredicts our 1.4 GHz source count in the range $-5 \lesssim \log[S(\mathrm{Jy})] \lesssim -4$., Comment: 20 pages, 18 figures. Accepted for publication in ApJ

Published
2019
Full Text
View/download PDF

7. Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event

Author

Heywood, I., Camilo, F., Cotton, W. D., Yusef-Zadeh, F., Abbott, T. D., Adam, R. M., Aldera, M. A., Bauermeister, E. F., Booth, R. S., Botha, A. G., Botha, D. H., Brederode, L. R. S., Brits, Z. B., Buchner, S. J., Burger, J. P., Chalmers, J. M., Cheetham, T., de Villiers, D., Dikgale-Mahlakoana, M. A., Toit, L. J. du, Esterhuyse, S. W. P., Fanaroff, B. L., Foley, A. R., Fourie, D. J., Gamatham, R. R. G., Goedhart, S., Gounden, S., Hlakola, M. J., Hoek, C. J., Hokwana, A., Horn, D. M., Horrell, J. M. G., Hugo, B., Isaacson, A. R., Jonas, J. L., Jordaan, J. D. B. L., Joubert, A. F., Józsa, G. I. G., Julie, R. P. M., Kapp, F. B., Kenyon, J. S., Kotzé, P. P. A., Kriel, H., Kusel, T. W., Lehmensiek, R., Liebenberg, D., Loots, A., Lord, R. T., Lunsky, B. M., Macfarlane, P. S., Magnus, L. G., Magozore, C. M., Mahgoub, O., Main, J. P. L., Malan, J. A., Malgas, R. D., Manley, J. R., Maree, M. D. J., Merry, B., Millenaar, R., Mnyandu, N., Moeng, I. P. T., Monama, T. E., Mphego, M. C., New, W. S., Ngcebetsha, B., Oozeer, N., Otto, A. J., Passmoor, S. S., Pate, A. A., Peens-Hough, A., Perkins, S. J., Ratcliffe, S. M., Renil, R., Rust, A., Salie, S., Schwardt, L. C., Serylak, M., Siebrits, R., Sirothia, S. K., Smirnov, O. M., Sofeya, L., Swart, P. S., Tasse, C., Taylor, D. T., Theron, I. P., Thorat, K., Tiplad, A. J., Tshongweni, S., van Balla, T. J., van der Byl, A., van der Merwe, C., van Dyk, C. L., Van Rooyen, R., Van Tonder, V., Van Wyk, R., Wallace, B. H., Welz, M. G., and Williams, L. P.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

The Galactic Centre contains a supermassive black hole with a mass of 4 million suns within an environment that differs markedly from that of the Galactic disk. While the black hole is essentially quiescent in the broader context of active galactic nuclei, X-ray observations have provided evidence for energetic outbursts from its surroundings. Also, while the levels of star formation in the Galactic Centre have been approximately constant over the last few hundred Myr, there is evidence of elevated short-duration bursts, strongly influenced by interaction of the black hole with the enhanced gas density present within the ring-like Central Molecular Zone at Galactic longitude |l| < 0.7 degrees and latitude |b| < 0.2 degrees. The inner 200 pc region is characterized by large amounts of warm molecular gas, a high cosmic ray ionization rate, unusual gas chemistry, enhanced synchrotron emission, and a multitude of radio-emitting magnetised filaments, the origin of which has not been established. Here we report radio imaging that reveals bipolar bubbles spanning 1 degree x 3 degrees (140 parsecs x 430 parsecs), extending above and below the Galactic plane and apparently associated with the Galactic Centre. The structure is edge-brightened and bounded, with symmetry implying creation by an energetic event in the Galactic Centre. We estimate the age of the bubbles to be a few million years, with a total energy of 7 x 10^52 ergs. We postulate that the progenitor event was a major contributor to the increased cosmic-ray density in the Galactic Centre, and is in turn the principal source of the relativistic particles required to power the synchrotron emission of the radio filaments within and in the vicinity of the bubble cavities., Comment: 25 pages, 3 figures, 3 tables, authors' version of a Letter published in Nature on 11 September 2019

Published
2019
Full Text
View/download PDF

8. Revival of the magnetar PSR J1622-4950: observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR

Author

Camilo, F., Scholz, P., Serylak, M., Buchner, S., Merryfield, M., Kaspi, V. M., Archibald, R. F., Bailes, M., Jameson, A., van Straten, W., Sarkissian, J., Reynolds, J. E., Johnston, S., Hobbs, G., Abbott, T. D., Adam, R. M., Adams, G. B., Alberts, T., Andreas, R., Asad, K. M. B., Baker, D. E., Baloyi, T., Bauermeister, E. F., Baxana, T., Bennett, T. G. H., Bernardi, G., Booisen, D., Booth, R. S., Botha, D. H., Boyana, L., Brederode, L. R. S., Burger, J. P., Cheetham, T., Conradie, J., Conradie, J. P., Davidson, D. B., de Bruin, G., de Swardt, B., de Villiers, C., de Villiers, D. I. L., de Villiers, M. S., de Villiers, W., de Waal, C., Dikgale, M. A., Toit, G. du, Toit, L. J. du, Esterhuyse, S. W. P., Fanaroff, B., Fataar, S., Foley, A. R., Foster, G., Fourie, D., Gamatham, R., Gatsi, T., Geschke, R., Goedhart, S., Grobler, T. L., Gumede, S. C., Hlakola, M. J., Hokwana, A., Hoorn, D. H., Horn, D., Horrell, J., Hugo, B., Isaacson, A., Jacobs, O., van Rensburg, J. P. Jansen, Jonas, J. L., Jordaan, B., Joubert, A., Joubert, F., Jozsa, G. I. G., Julie, R., Julius, C. C., Kapp, F., Karastergiou, A., Karels, F., Kariseb, M., Karuppusamy, R., Kasper, V., Knox-Davies, E. C., Koch, D., Kotze, P. P. A., Krebs, A., Kriek, N., Kriel, H., Kusel, T., Lamoor, S., Lehmensiek, R., Liebenberg, D., Liebenberg, I., Lord, R. T., Lunsky, B., Mabombo, N., Macdonald, T., Macfarlane, P., Madisa, K., Mafhungo, L., Magnus, L. G., Magozore, C., Mahgoub, O., Main, J. P. L., Makhathini, S., Malan, J. A., Malgas, P., Manley, J. R., Manzini, M., Marais, L., Marais, N., Marais, S. J., Maree, M., Martens, A., Matshawule, S. D., Matthysen, N., Mauch, T., Nally, L. D. Mc, Merry, B., Millenaar, R. P., Mjikelo, C., Mkhabela, N., Mnyandu, N., Moeng, I. T., Mokone, O. J., Monama, T. E., Montshiwa, K., Moss, V., Mphego, M., New, W., Ngcebetsha, B., Ngoasheng, K., Niehaus, H., Ntuli, P., Nzama, A., Obies, F., Obrocka, M., Ockards, M. T., Olyn, C., Oozeer, N., Otto, A. J., Padayachee, Y., Passmoor, S., Patel, A. A., Paula, S., Peens-Hough, A., Pholoholo, B., Prozesky, P., Rakoma, S., Ramaila, A. J. T., Rammala, I., Ramudzuli, Z. R., Rasivhaga, M., Ratcliffe, S., Reader, H. C., Renil, R., Richter, L., Robyntjies, A., Rosekrans, D., Rust, A., Salie, S., Sambu, N., Schollar, C. T. G., Schwardt, L., Seranyane, S., Sethosa, G., Sharpe, C., Siebrits, R., Sirothia, S. K., Slabber, M. J., Smirnov, O., Smith, S., Sofeya, L., Songqumase, N., Spann, R., Stappers, B., Steyn, D., Steyn, T. J., Strong, R., Struthers, A., Stuart, C., Sunnylall, P., Swart, P. S., Taljaard, B., Tasse, C., Taylor, G., Theron, I. P., Thondikulam, V., Thorat, K., Tiplady, A., Toruvanda, O., van Aardt, J., van Balla, T., Heever, L. van den, van der Byl, A., van der Merwe, C., van der Merwe, P., van Niekerk, P. C., van Rooyen, R., van Staden, J. P., van Tonder, V., van Wyk, R., Wait, I., Walker, A. L., Wallace, B., Welz, M., Williams, L. P., Xaia, B., Young, N., and Zitha, S.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

New radio (MeerKAT and Parkes) and X-ray (XMM-Newton, Swift, Chandra, and NuSTAR) observations of PSR J1622-4950 indicate that the magnetar, in a quiescent state since at least early 2015, reactivated between 2017 March 19 and April 5. The radio flux density, while variable, is approximately 100x larger than during its dormant state. The X-ray flux one month after reactivation was at least 800x larger than during quiescence, and has been decaying exponentially on a 111+/-19 day timescale. This high-flux state, together with a radio-derived rotational ephemeris, enabled for the first time the detection of X-ray pulsations for this magnetar. At 5%, the 0.3-6 keV pulsed fraction is comparable to the smallest observed for magnetars. The overall pulsar geometry inferred from polarized radio emission appears to be broadly consistent with that determined 6-8 years earlier. However, rotating vector model fits suggest that we are now seeing radio emission from a different location in the magnetosphere than previously. This indicates a novel way in which radio emission from magnetars can differ from that of ordinary pulsars. The torque on the neutron star is varying rapidly and unsteadily, as is common for magnetars following outburst, having changed by a factor of 7 within six months of reactivation., Comment: Published in ApJ (2018 April 5); 13 pages, 4 figures

Published
2018
Full Text
View/download PDF

10. A MeerKAT view on galaxy clusters

Author

Bernardi, G., Venturi, T., Cassano, R., Brunetti, G., Dallacasa, D., Fanaroff, B., Hugo, B., Makhatini, S., Oozeer, N., Smirnov, O. M., and Zwart, J. T. L.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Almost two decades of observations of radio emission in galaxy clusters have proven the existence of relativistic particles and magnetic fields that generate extended synchrotron emission in the form of radio halos. In the current scenario, radio halos are generated through re--acceleration of relativistic electrons by turbulence generated by cluster mergers. Although this theoretical framework has received increasingly supporting observational evidence over the last ten years, observations of statistically complete samples are needed in order to fundamentally test model predictions. In this paper we briefly review our 7--element Karoo Radio Telescope observations of a sample of nearby clusters aimed to test the predictions of the turbulent re--acceleration model in small systems ($M_{500} > 4 \times 10^{14}$ M$_{\odot}$). We conclude by presenting two galaxy cluster surveys to be carried out with MeerKAT in order to provide crucial test of models of radio halo formation in nearby ($z < 0.1$) and high redshift ($z > 0.4$) systems respectively., Comment: 7 pages, 2 figures Accepted for publication, Proceedings of Science, Workshop on "MeerKAT Science: On the Pathway to the SKA", held in Stellenbosch 25-27 May, 2016

Published
2017

11. Engineering and Science Highlights of the KAT-7 Radio Telescope

Author

Foley, A. R., Alberts, T., Armstrong, R P., Barta, A., Bauermeister, E. F., Bester, H., Blose, S., Booth, R. S., Botha, D. H., Buchner, S. J., Carignan, C., Cheetham, T., Cloete, K., Coreejes, G., Crida, R. C., Cross, S. D., Curtolo, F., Dikgale, A., de Villiers, M. S., Toit, L. J. du, Esterhuyse, S. W. P., Fanaroff, B., Fender, R. P., Fijalkowski, M., Fourie, D., Frank, B., George, D., Gibbs, P., Goedhart, S., Grobbelaar, J., Gumede, S. C., Herselman, P., Hess, K. M., Hoek, N., Horrell, J., Jonas, J. L., Jordaan, J. D. B., Julie, R., Kapp, F., Kotzé, P., Kusel, T., Langman, A., Lehmensiek, R., Liebenberg, D., Liebenberg, I. J. V., Loots, A., Lord, R. T., Lucero, D. M., Ludick, J., Macfarlane, P., Madlavana, M., Magnus, L., Magozore, C., Malan, J. A., Manley, J. R., Marais, L., Marais, N., Marais, S. J., Maree, M., Martens, A., Mokone, O., Moss, V., Mthembu, S., New, W., Nicholson, G. D., van Niekerk, P. C., Oozeer, N., Passmoor, S. S., Peens-Hough, A., Pińska, A. B., Prozesky, P., Rajan, S., Ratcliffe, S., Renil, R., Richter, L. L., Rosekrans, D., Rust, A., Schröder, A. C., Schwardt, L. C., Seranyane, S., Serylak, M., Shepherd, D. S., Siebrits, R., Sofeya, L., Spann, R., Springbok, R., Swart, P. S., Thondikulam, Venkatasubramani L., Theron, I. P., Tiplady, A., Toruvanda, O., Tshongweni, S., Heever, L. van den, van der Merwe, C., van Rooyen, R., Wakhaba, S., Walker, A. L., Welz, M., Williams, L., Wolleben, M., Woudt, P. A., Young, N. J., and Zwart, J. T. L.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The construction of the KAT-7 array in the Karoo region of the Northern Cape in South Africa was intended primarily as an engineering prototype for technologies and techniques applicable to the MeerKAT telescope. This paper looks at the main engineering and scien- tific highlights from this effort, and discusses their applicability to both MeerKAT and other next-generation radio telescopes. In particular we found that the composite dish surface works well, but it becomes complicated to fabricate for a dish lacking circular symmetry; the Stir- ling cycle cryogenic system with ion pump to achieve vacuum works but demands much higher maintenance than an equivalent Gifford-McMahon cycle system; the ROACH (Recon- figurable Open Architecture Computing Hardware)-based correlator with SPEAD (Stream- ing Protocol for Exchanging Astronomical Data) protocol data transfer works very well and KATCP (Karoo Array Telescope Control Protocol) control protocol has proven very flexible and convenient. KAT-7 has also been used for scientific observations where it has a niche in mapping low surface-brightness continuum sources, some extended HI halos and OH masers in star-forming regions. It can also be used to monitor continuum source variability, observe pulsars, and make VLBI observations

Published
2016
Full Text
View/download PDF

12. An African VLBI network of radio telescopes

Author

Gaylard, M. J., Bietenholz, M. F., Combrinck, L., Booth, R. S., Buchner, S. J., Fanaroff, B. L., MacLeod, G. C., Nicolson, G. D., Quick, J. F. H., Stronkhorst, P., and Venkatasubramani, T. L.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The advent of international wideband communication by optical fibre has produced a revolution in communications and the use of the internet. Many African countries are now connected to undersea fibre linking them to other African countries and to other continents. Previously international communication was by microwave links through geostationary satellites. These are becoming redundant in some countries as optical fibre takes over, as this provides 1000 times the bandwidth of the satellite links. In the 1970's and 1980's some two dozen large (30 m diameter class) antennas were built in various African countries to provide the satellite links. Twenty six are currently known in 19 countries. As these antennas become redundant, the possibility exists to convert them for radio astronomy at a cost of roughly one tenth that of a new antenna of similar size. HartRAO, SKA Africa and the South African Department of Science and Technology (DST) have started exploring this possibility with some of the African countries., Comment: 6 pages, proceedings of the South African Institute of Physics 56th Annual Conference, published electronicallyu at http://www.saip.org.za/index.php/news-and-events/saip-annual-conferences/152-saip2012-proceedings

Published
2014

13. A return to strong radio flaring by Circinus X-1 observed with the Karoo Array Telescope test array KAT-7

Author

Armstrong, R. P., Fender, R. P., Nicolson, G. D., Ratcliffe, S., Linares, M., Horrell, J., Richter, L., Schurch, M. P. E., Coriat, M., Woudt, P., Jonas, J., Booth, R., and Fanaroff, B.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Circinus X-1 is a bright and highly variable X-ray binary which displays strong and rapid evolution in all wavebands. Radio flaring, associated with the production of a relativistic jet, occurs periodically on a ~17-day timescale. A longer-term envelope modulates the peak radio fluxes in flares, ranging from peaks in excess of a Jansky in the 1970s to an historic low of milliJanskys during the years 1994 to 2007. Here we report first observations of this source with the MeerKAT test array, KAT-7, part of the pathfinder development for the African dish component of the Square Kilometre Array (SKA), demonstrating successful scientific operation for variable and transient sources with the test array. The KAT-7 observations at 1.9 GHz during the period 13 December 2011 to 16 January 2012 reveal in temporal detail the return to the Jansky-level events observed in the 1970s. We compare these data to contemporaneous single-dish measurements at 4.8 and 8.5 GHz with the HartRAO 26-m telescope and X-ray monitoring from MAXI. We discuss whether the overall modulation and recent dramatic brightening is likely to be due to an increase in the power of the jet due to changes in accretion rate or changing Doppler boosting associated with a varying angle to the line of sight., Comment: 7 pages, 5 figures, accepted for publication in MNRAS 14 May 2013

Published
2013
Full Text
View/download PDF

14. MeerKAT Key Project Science, Specifications, and Proposals

Author

Booth, R. S., de Blok, W. J. G., Jonas, J. L., and Fanaroff, B.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We present the specifications of the MeerKAT Karoo Array Telescope, the South African Square Kilometre Array Precursor. Some of the key science for MeerKAT is described in this document. We invite the community to submit proposals for Large Key Projects.

Published
2009

15. The 1.28 GHz MeerKAT Galactic Center Mosaic

Author

Heywood, I., primary, Rammala, I., additional, Camilo, F., additional, Cotton, W. D., additional, Yusef-Zadeh, F., additional, Abbott, T. D., additional, Adam, R. M., additional, Adams, G., additional, Aldera, M. A., additional, Asad, K. M. B., additional, Bauermeister, E. F., additional, Bennett, T. G. H., additional, Bester, H. L., additional, Bode, W. A., additional, Botha, D. H., additional, Botha, A. G., additional, Brederode, L. R. S., additional, Buchner, S., additional, Burger, J. P., additional, Cheetham, T., additional, de Villiers, D. I. L., additional, Dikgale-Mahlakoana, M. A., additional, du Toit, L. J., additional, Esterhuyse, S. W. P., additional, Fanaroff, B. L., additional, February, S., additional, Fourie, D. J., additional, Frank, B. S., additional, Gamatham, R. R. G., additional, Geyer, M., additional, Goedhart, S., additional, Gouws, M., additional, Gumede, S. C., additional, Hlakola, M. J., additional, Hokwana, A., additional, Hoosen, S. W., additional, Horrell, J. M. G., additional, Hugo, B., additional, Isaacson, A. I., additional, Józsa, G. I. G., additional, Jonas, J. L., additional, Joubert, A. F., additional, Julie, R. P. M., additional, Kapp, F. B., additional, Kenyon, J. S., additional, Kotzé, P. P. A., additional, Kriek, N., additional, Kriel, H., additional, Krishnan, V. K., additional, Lehmensiek, R., additional, Liebenberg, D., additional, Lord, R. T., additional, Lunsky, B. M., additional, Madisa, K., additional, Magnus, L. G., additional, Mahgoub, O., additional, Makhaba, A., additional, Makhathini, S., additional, Malan, J. A., additional, Manley, J. R., additional, Marais, S. J., additional, Martens, A., additional, Mauch, T., additional, Merry, B. C., additional, Millenaar, R. P., additional, Mnyandu, N., additional, Mokone, O. J., additional, Monama, T. E., additional, Mphego, M. C., additional, New, W. S., additional, Ngcebetsha, B., additional, Ngoasheng, K. J., additional, Ockards, M. T., additional, Oozeer, N., additional, Otto, A. J., additional, Passmoor, S. S., additional, Patel, A. A., additional, Peens-Hough, A., additional, Perkins, S. J., additional, Ramaila, A. J. T., additional, Ramanujam, N. M. R., additional, Ramudzuli, Z. R., additional, Ratcliffe, S. M., additional, Robyntjies, A., additional, Salie, S., additional, Sambu, N., additional, Schollar, C. T. G., additional, Schwardt, L. C., additional, Schwartz, R. L., additional, Serylak, M., additional, Siebrits, R., additional, Sirothia, S. K., additional, Slabber, M., additional, Smirnov, O. M., additional, Sofeya, L., additional, Taljaard, B., additional, Tasse, C., additional, Tiplady, A. J., additional, Toruvanda, O., additional, Twum, S. N., additional, van Balla, T. J., additional, van der Byl, A., additional, van der Merwe, C., additional, Van Tonder, V., additional, Van Wyk, R., additional, Venter, A. J., additional, Venter, M., additional, Wallace, B. H., additional, Welz, M. G., additional, Williams, L. P., additional, and Xaia, B., additional

Published
2022
Full Text
View/download PDF

16. The MeerKAT Galaxy Cluster Legacy Survey

Author

Knowles, K., primary, Cotton, W. D., additional, Rudnick, L., additional, Camilo, F., additional, Goedhart, S., additional, Deane, R., additional, Ramatsoku, M., additional, Bietenholz, M. F., additional, Brüggen, M., additional, Button, C., additional, Chen, H., additional, Chibueze, J. O., additional, Clarke, T. E., additional, de Gasperin, F., additional, Ianjamasimanana, R., additional, Józsa, G. I. G., additional, Hilton, M., additional, Kesebonye, K. C., additional, Kolokythas, K., additional, Kraan-Korteweg, R. C., additional, Lawrie, G., additional, Lochner, M., additional, Loubser, S. I., additional, Marchegiani, P., additional, Mhlahlo, N., additional, Moodley, K., additional, Murphy, E., additional, Namumba, B., additional, Oozeer, N., additional, Parekh, V., additional, Pillay, D. S., additional, Passmoor, S. S., additional, Ramaila, A. J. T., additional, Ranchod, S., additional, Retana-Montenegro, E., additional, Sebokolodi, L., additional, Sikhosana, S. P., additional, Smirnov, O., additional, Thorat, K., additional, Venturi, T., additional, Abbott, T. D., additional, Adam, R. M., additional, Adams, G., additional, Aldera, M. A., additional, Bauermeister, E. F., additional, Bennett, T. G. H., additional, Bode, W. A., additional, Botha, D. H., additional, Botha, A. G., additional, Brederode, L. R. S., additional, Buchner, S., additional, Burger, J. P., additional, Cheetham, T., additional, de Villiers, D. I. L., additional, Dikgale-Mahlakoana, M. A., additional, du Toit, L. J., additional, Esterhuyse, S. W. P., additional, Fadana, G., additional, Fanaroff, B. L., additional, Fataar, S., additional, Foley, A. R., additional, Fourie, D. J., additional, Frank, B. S., additional, Gamatham, R. R. G., additional, Gatsi, T. G., additional, Geyer, M., additional, Gouws, M., additional, Gumede, S. C., additional, Heywood, I., additional, Hlakola, M. J., additional, Hokwana, A., additional, Hoosen, S. W., additional, Horn, D. M., additional, Horrell, J. M. G., additional, Hugo, B. V., additional, Isaacson, A. R., additional, Jonas, J. L., additional, Jordaan, J. D. B., additional, Joubert, A. F., additional, Julie, R. P. M., additional, Kapp, F. B., additional, Kasper, V. A., additional, Kenyon, J. S., additional, Kotzé, P. P. A., additional, Kotze, A. G., additional, Kriek, N., additional, Kriel, H., additional, Krishnan, V. K., additional, Kusel, T. W., additional, Legodi, L. S., additional, Lehmensiek, R., additional, Liebenberg, D., additional, Lord, R. T., additional, Lunsky, B. M., additional, Madisa, K., additional, Magnus, L. G., additional, Main, J. P. L., additional, Makhaba, A., additional, Makhathini, S., additional, Malan, J. A., additional, Manley, J. R., additional, Marais, S. J., additional, Maree, M. D. J., additional, Martens, A., additional, Mauch, T., additional, McAlpine, K., additional, Merry, B. C., additional, Millenaar, R. P., additional, Mokone, O. J., additional, Monama, T. E., additional, Mphego, M. C., additional, New, W. S., additional, Ngcebetsha, B., additional, Ngoasheng, K. J., additional, Ockards, M. T., additional, Otto, A. J., additional, Patel, A. A., additional, Peens-Hough, A., additional, Perkins, S. J., additional, Ramanujam, N. M., additional, Ramudzuli, Z. R., additional, Ratcliffe, S. M., additional, Renil, R., additional, Robyntjies, A., additional, Rust, A. N., additional, Salie, S., additional, Sambu, N., additional, Schollar, C. T. G., additional, Schwardt, L. C., additional, Schwartz, R. L., additional, Serylak, M., additional, Siebrits, R., additional, Sirothia, S. K., additional, Slabber, M., additional, Sofeya, L., additional, Taljaard, B., additional, Tasse, C., additional, Tiplady, A. J., additional, Toruvanda, O., additional, Twum, S. N., additional, van Balla, T. J., additional, van der Byl, A., additional, van der Merwe, C., additional, van Dyk, C. L., additional, Van Tonder, V., additional, Van Wyk, R., additional, Venter, A. J., additional, Venter, M., additional, Welz, M. G., additional, Williams, L. P., additional, and Xaia, B., additional

Published
2022
Full Text
View/download PDF

17. Hydrodynamical backflow in X-shaped radio galaxy PKS 2014−55

Author

Cotton, W D, primary, Thorat, K, primary, Condon, J J, primary, Frank, B S, primary, Józsa, G I G, primary, White, S V, primary, Deane, R, primary, Oozeer, N, primary, Atemkeng, M, primary, Bester, L, primary, Fanaroff, B, primary, Kupa, R S, primary, Smirnov, O M, primary, Mauch, T, primary, Krishnan, V, primary, and Camilo, F, primary

Published
2020
Full Text
View/download PDF

18. The 1.28 GHz MeerKAT DEEP2 Image

Author

Mauch, T., primary, Cotton, W. D., additional, Condon, J. J., additional, Matthews, A. M., additional, Abbott, T. D., additional, Adam, R. M., additional, Aldera, M. A., additional, Asad, K. M. B., additional, Bauermeister, E. F., additional, Bennett, T. G. H., additional, Bester, H., additional, Botha, D. H., additional, Brederode, L. R. S., additional, Brits, Z. B., additional, Buchner, S. J., additional, Burger, J. P., additional, Camilo, F., additional, Chalmers, J. M., additional, Cheetham, T., additional, Villiers, D. de, additional, Villiers, M. S. de, additional, Dikgale-Mahlakoana, M. A., additional, Toit, L. J. du, additional, Esterhuyse, S. W. P., additional, Fadana, G., additional, Fanaroff, B. L., additional, Fataar, S., additional, February, S., additional, Frank, B. S., additional, Gamatham, R. R. G., additional, Geyer, M., additional, Goedhart, S., additional, Gounden, S., additional, Gumede, S. C., additional, Heywood, I., additional, Hlakola, M. J., additional, Horrell, J. M. G., additional, Hugo, B., additional, Isaacson, A. R., additional, Józsa, G. I. G., additional, Jonas, J. L., additional, Julie, R. P. M., additional, Kapp, F. B., additional, Kasper, V. A., additional, Kenyon, J. S., additional, Kotzé, P. P. A., additional, Kriek, N., additional, Kriel, H., additional, Kusel, T. W., additional, Lehmensiek, R., additional, Loots, A., additional, Lord, R. T., additional, Lunsky, B. M., additional, Madisa, K., additional, Magnus, L. G., additional, Main, J. P. L., additional, Malan, J. A., additional, Manley, J. R., additional, Marais, S. J., additional, Martens, A., additional, Merry, B., additional, Millenaar, R., additional, Mnyandu, N., additional, Moeng, I. P. T., additional, Mokone, O. J., additional, Monama, T. E., additional, Mphego, M. C., additional, New, W. S., additional, Ngcebetsha, B., additional, Ngoasheng, K. J., additional, Ockards, M. T. O., additional, Oozeer, N., additional, Otto, A. J., additional, Patel, A. A., additional, Peens-Hough, A., additional, Perkins, S. J., additional, Ramaila, A. J. T., additional, Ramudzuli, Z. R., additional, Renil, R., additional, Richter, L. L., additional, Robyntjies, A., additional, Salie, S., additional, Schollar, C. T. G., additional, Schwardt, L. C., additional, Serylak, M., additional, Siebrits, R., additional, Sirothia, S. K., additional, Smirnov, O. M., additional, Sofeya, L., additional, Stone, G., additional, Taljaard, B., additional, Tasse, C., additional, Theron, I. P., additional, Tiplady, A. J., additional, Toruvanda, O., additional, Twum, S. N., additional, Balla, T. J. van, additional, Byl, A. van der, additional, Merwe, C. van der, additional, Tonder, V. Van, additional, Wallace, B. H., additional, Welz, M. G., additional, Williams, L. P., additional, and Xaia, B., additional

Published
2020
Full Text
View/download PDF

20. Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event

Author

Heywood, I., primary, Camilo, F., additional, Cotton, W. D., additional, Yusef-Zadeh, F., additional, Abbott, T. D., additional, Adam, R. M., additional, Aldera, M. A., additional, Bauermeister, E. F., additional, Booth, R. S., additional, Botha, A. G., additional, Botha, D. H., additional, Brederode, L. R. S., additional, Brits, Z. B., additional, Buchner, S. J., additional, Burger, J. P., additional, Chalmers, J. M., additional, Cheetham, T., additional, de Villiers, D., additional, Dikgale-Mahlakoana, M. A., additional, du Toit, L. J., additional, Esterhuyse, S. W. P., additional, Fanaroff, B. L., additional, Foley, A. R., additional, Fourie, D. J., additional, Gamatham, R. R. G., additional, Goedhart, S., additional, Gounden, S., additional, Hlakola, M. J., additional, Hoek, C. J., additional, Hokwana, A., additional, Horn, D. M., additional, Horrell, J. M. G., additional, Hugo, B., additional, Isaacson, A. R., additional, Jonas, J. L., additional, Jordaan, J. D. B. L., additional, Joubert, A. F., additional, Józsa, G. I. G., additional, Julie, R. P. M., additional, Kapp, F. B., additional, Kenyon, J. S., additional, Kotzé, P. P. A., additional, Kriel, H., additional, Kusel, T. W., additional, Lehmensiek, R., additional, Liebenberg, D., additional, Loots, A., additional, Lord, R. T., additional, Lunsky, B. M., additional, Macfarlane, P. S., additional, Magnus, L. G., additional, Magozore, C. M., additional, Mahgoub, O., additional, Main, J. P. L., additional, Malan, J. A., additional, Malgas, R. D., additional, Manley, J. R., additional, Maree, M. D. J., additional, Merry, B., additional, Millenaar, R., additional, Mnyandu, N., additional, Moeng, I. P. T., additional, Monama, T. E., additional, Mphego, M. C., additional, New, W. S., additional, Ngcebetsha, B., additional, Oozeer, N., additional, Otto, A. J., additional, Passmoor, S. S., additional, Patel, A. A., additional, Peens-Hough, A., additional, Perkins, S. J., additional, Ratcliffe, S. M., additional, Renil, R., additional, Rust, A., additional, Salie, S., additional, Schwardt, L. C., additional, Serylak, M., additional, Siebrits, R., additional, Sirothia, S. K., additional, Smirnov, O. M., additional, Sofeya, L., additional, Swart, P. S., additional, Tasse, C., additional, Taylor, D. T., additional, Theron, I. P., additional, Thorat, K., additional, Tiplady, A. J., additional, Tshongweni, S., additional, van Balla, T. J., additional, van der Byl, A., additional, van der Merwe, C., additional, van Dyk, C. L., additional, Van Rooyen, R., additional, Van Tonder, V., additional, Van Wyk, R., additional, Wallace, B. H., additional, Welz, M. G., additional, and Williams, L. P., additional

Published
2019
Full Text
View/download PDF

21. Revival of the Magnetar PSR J1622–4950: Observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR

Author

Camilo, F., primary, Scholz, P., additional, Serylak, M., additional, Buchner, S., additional, Merryfield, M., additional, Kaspi, V. M., additional, Archibald, R. F., additional, Bailes, M., additional, Jameson, A., additional, Straten, W. van, additional, Sarkissian, J., additional, Reynolds, J. E., additional, Johnston, S., additional, Hobbs, G., additional, Abbott, T. D., additional, Adam, R. M., additional, Adams, G. B., additional, Alberts, T., additional, Andreas, R., additional, Asad, K. M. B., additional, Baker, D. E., additional, Baloyi, T., additional, Bauermeister, E. F., additional, Baxana, T., additional, Bennett, T. G. H., additional, Bernardi, G., additional, Booisen, D., additional, Booth, R. S., additional, Botha, D. H., additional, Boyana, L., additional, Brederode, L. R. S., additional, Burger, J. P., additional, Cheetham, T., additional, Conradie, J., additional, Conradie, J. P., additional, Davidson, D. B., additional, Bruin, G. De, additional, Swardt, B. de, additional, Villiers, C. de, additional, Villiers, D. I. L. de, additional, Villiers, M. S. de, additional, Villiers, W. de, additional, Waal, C. De, additional, Dikgale, M. A., additional, Toit, G. du, additional, Toit, L. J. du, additional, Esterhuyse, S. W. P., additional, Fanaroff, B., additional, Fataar, S., additional, Foley, A. R., additional, Foster, G., additional, Fourie, D., additional, Gamatham, R., additional, Gatsi, T., additional, Geschke, R., additional, Goedhart, S., additional, Grobler, T. L., additional, Gumede, S. C., additional, Hlakola, M. J., additional, Hokwana, A., additional, Hoorn, D. H., additional, Horn, D., additional, Horrell, J., additional, Hugo, B., additional, Isaacson, A., additional, Jacobs, O., additional, van Rensburg, J. P. Jansen, additional, Jonas, J. L., additional, Jordaan, B., additional, Joubert, A., additional, Joubert, F., additional, Józsa, G. I. G., additional, Julie, R., additional, Julius, C. C., additional, Kapp, F., additional, Karastergiou, A., additional, Karels, F., additional, Kariseb, M., additional, Karuppusamy, R., additional, Kasper, V., additional, Knox-Davies, E. C., additional, Koch, D., additional, Kotzé, P. P. A., additional, Krebs, A., additional, Kriek, N., additional, Kriel, H., additional, Kusel, T., additional, Lamoor, S., additional, Lehmensiek, R., additional, Liebenberg, D., additional, Liebenberg, I., additional, Lord, R. T., additional, Lunsky, B., additional, Mabombo, N., additional, Macdonald, T., additional, Macfarlane, P., additional, Madisa, K., additional, Mafhungo, L., additional, Magnus, L. G., additional, Magozore, C., additional, Mahgoub, O., additional, Main, J. P. L., additional, Makhathini, S., additional, Malan, J. A., additional, Malgas, P., additional, Manley, J. R., additional, Manzini, M., additional, Marais, L., additional, Marais, N., additional, Marais, S. J., additional, Maree, M., additional, Martens, A., additional, Matshawule, S. D., additional, Matthysen, N., additional, Mauch, T., additional, Nally, L. D. Mc, additional, Merry, B., additional, Millenaar, R. P., additional, Mjikelo, C., additional, Mkhabela, N., additional, Mnyandu, N., additional, Moeng, I. T., additional, Mokone, O. J., additional, Monama, T. E., additional, Montshiwa, K., additional, Moss, V., additional, Mphego, M., additional, New, W., additional, Ngcebetsha, B., additional, Ngoasheng, K., additional, Niehaus, H., additional, Ntuli, P., additional, Nzama, A., additional, Obies, F., additional, Obrocka, M., additional, Ockards, M. T., additional, Olyn, C., additional, Oozeer, N., additional, Otto, A. J., additional, Padayachee, Y., additional, Passmoor, S., additional, Patel, A. A., additional, Paula, S., additional, Peens-Hough, A., additional, Pholoholo, B., additional, Prozesky, P., additional, Rakoma, S., additional, Ramaila, A. J. T., additional, Rammala, I., additional, Ramudzuli, Z. R., additional, Rasivhaga, M., additional, Ratcliffe, S., additional, Reader, H. C., additional, Renil, R., additional, Richter, L., additional, Robyntjies, A., additional, Rosekrans, D., additional, Rust, A., additional, Salie, S., additional, Sambu, N., additional, Schollar, C. T. G., additional, Schwardt, L., additional, Seranyane, S., additional, Sethosa, G., additional, Sharpe, C., additional, Siebrits, R., additional, Sirothia, S. K., additional, Slabber, M. J., additional, Smirnov, O., additional, Smith, S., additional, Sofeya, L., additional, Songqumase, N., additional, Spann, R., additional, Stappers, B., additional, Steyn, D., additional, Steyn, T. J., additional, Strong, R., additional, Struthers, A., additional, Stuart, C., additional, Sunnylall, P., additional, Swart, P. S., additional, Taljaard, B., additional, Tasse, C., additional, Taylor, G., additional, Theron, I. P., additional, Thondikulam, V., additional, Thorat, K., additional, Tiplady, A., additional, Toruvanda, O., additional, Aardt, J. van, additional, Balla, T. van, additional, Heever, L. van den, additional, Byl, A. van der, additional, Merwe, C. van der, additional, Merwe, P. van der, additional, Niekerk, P. C. van, additional, Rooyen, R. van, additional, Staden, J. P. van, additional, Tonder, V. van, additional, Wyk, R. van, additional, Wait, I., additional, Walker, A. L., additional, Wallace, B., additional, Welz, M., additional, Williams, L. P., additional, Xaia, B., additional, Young, N., additional, and Zitha, S., additional

Published
2018
Full Text
View/download PDF

22. Engineering and science highlights of the KAT-7 radio telescope

Author

Foley, A. R., primary, Alberts, T., additional, Armstrong, R. P., additional, Barta, A., additional, Bauermeister, E. F., additional, Bester, H., additional, Blose, S., additional, Booth, R. S., additional, Botha, D. H., additional, Buchner, S. J., additional, Carignan, C., additional, Cheetham, T., additional, Cloete, K., additional, Coreejes, G., additional, Crida, R. C., additional, Cross, S. D., additional, Curtolo, F., additional, Dikgale, A., additional, de Villiers, M. S., additional, du Toit, L. J., additional, Esterhuyse, S. W. P., additional, Fanaroff, B., additional, Fender, R. P., additional, Fijalkowski, M., additional, Fourie, D., additional, Frank, B., additional, George, D., additional, Gibbs, P., additional, Goedhart, S., additional, Grobbelaar, J., additional, Gumede, S. C., additional, Herselman, P., additional, Hess, K. M., additional, Hoek, N., additional, Horrell, J., additional, Jonas, J. L., additional, Jordaan, J. D. B., additional, Julie, R., additional, Kapp, F., additional, Kotzé, P., additional, Kusel, T., additional, Langman, A., additional, Lehmensiek, R., additional, Liebenberg, D., additional, Liebenberg, I. J. V., additional, Loots, A., additional, Lord, R. T., additional, Lucero, D. M., additional, Ludick, J., additional, Macfarlane, P., additional, Madlavana, M., additional, Magnus, L., additional, Magozore, C., additional, Malan, J. A., additional, Manley, J. R., additional, Marais, L., additional, Marais, N., additional, Marais, S. J., additional, Maree, M., additional, Martens, A., additional, Mokone, O., additional, Moss, V., additional, Mthembu, S., additional, New, W., additional, Nicholson, G. D., additional, van Niekerk, P. C., additional, Oozeer, N., additional, Passmoor, S. S., additional, Peens-Hough, A., additional, Pińska, A. B., additional, Prozesky, P., additional, Rajan, S., additional, Ratcliffe, S., additional, Renil, R., additional, Richter, L. L., additional, Rosekrans, D., additional, Rust, A., additional, Schröder, A. C., additional, Schwardt, L. C., additional, Seranyane, S., additional, Serylak, M., additional, Shepherd, D. S., additional, Siebrits, R., additional, Sofeya, L., additional, Spann, R., additional, Springbok, R., additional, Swart, P. S., additional, Thondikulam, Venkatasubramani L., additional, Theron, I. P., additional, Tiplady, A., additional, Toruvanda, O., additional, Tshongweni, S., additional, van den Heever, L., additional, van der Merwe, C., additional, van Rooyen, R., additional, Wakhaba, S., additional, Walker, A. L., additional, Welz, M., additional, Williams, L., additional, Wolleben, M., additional, Woudt, P. A., additional, Young, N. J., additional, and Zwart, J. T. L., additional

Published
2016
Full Text
View/download PDF

25. Radio and Optical Studies of 4C 11.50

Author

Argue, A. N., primary, Ekers, R. D., additional, Fanaroff, B. L., additional, Hazard, C., additional, Ryle, M., additional, Shakeshaft, J. R., additional, Stockton, A., additional, and Webster, A. S., additional

Published
1974
Full Text
View/download PDF

30. A challenge to scientists.

Author

Fanaroff, B.

Subjects
*SCIENCE & state
Abstract

Discusses the future of science and technology in South Africa. Strategic planning process to address the nation's long-term vision; Five-year expenditure and income plan; Area that are important to stimulate investment in science and technology; Possibility of a substantial investment in science and technology.

Published
1995

Catalog

Books, media, physical & digital resources
See catalog results