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I. P. Theron
Researcher at Stellenbosch University
Publications - 28
Citations - 725
I. P. Theron is an academic researcher from Stellenbosch University. The author has contributed to research in topics: Radio telescope & Feed horn. The author has an hindex of 13, co-authored 27 publications receiving 603 citations. Previous affiliations of I. P. Theron include Rhodes University.
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Journal ArticleDOI
Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event
Ian Heywood,Ian Heywood,Fernando Camilo,W. D. Cotton,Farhad Yusef-Zadeh,T. D. Abbott,R. M. Adam,M. A. Aldera,E. F. Bauermeister,Roy Booth,A. G. Botha,D. H. Botha,L. R. S. Brederode,Z. B. Brits,S. Buchner,J. P. Burger,J. M. Chalmers,T. Cheetham,Dirk I. L. de Villiers,M. A. Dikgale-Mahlakoana,L. J. du Toit,S. W. P. Esterhuyse,B. L. Fanaroff,A. R. Foley,Dehann Fourie,R. R. G. Gamatham,Sharmila Goedhart,S. Gounden,M. J. Hlakola,C. J. Hoek,A. Hokwana,D. M. Horn,J. Horrell,B. Hugo,A. R. Isaacson,Justin L. Jonas,J. D. B. L. Jordaan,A. F. Joubert,Gyula I. G. Józsa,R. P. M. Julie,F. Kapp,J. S. Kenyon,P. P. A. Kotzé,H. Kriel,T. W. Kusel,Robert Lehmensiek,Robert Lehmensiek,D. Liebenberg,A. Loots,R. T. Lord,B. M. Lunsky,P. Macfarlane,L. G. Magnus,C. Magozore,O. Mahgoub,J. P. L. Main,J. A. Malan,R. D. Malgas,Jason Manley,Matthys Maree,Bruce Merry,Robert P. Millenaar,N. Mnyandu,I. P. T. Moeng,T. E. Monama,M. C. Mphego,W. S. New,B. Ngcebetsha,Nadeem Oozeer,A. J. Otto,S. S. Passmoor,A. A. Patel,A. Peens-Hough,Simon Perkins,S. Ratcliffe,R. Renil,A. Rust,S. Salie,L. C. Schwardt,M. Serylak,R. Siebrits,S. K. Sirothia,Oleg Smirnov,L. Sofeya,P. S. Swart,Cyril Tasse,Cyril Tasse,D. T. Taylor,I. P. Theron,I. P. Theron,Kshitij Thorat,A. J. Tiplady,S. Tshongweni,T. J. van Balla,A. van der Byl,C.G. Van der Merwe,C. L. van Dyk,R. van Rooyen,V. Van Tonder,R. van Wyk,B. H. Wallace,M. G. Welz,L. P. Williams +102 more
TL;DR: In this article, radio imaging reveals a bipolar bubble structure, with an overall span of 1 degree by 3 degrees (140,parsecs,×µ430µ parsecs), extending above and below the Galactic plane and apparently associated with the Galactic Centre.
Journal ArticleDOI
Revival of the Magnetar PSR J1622-4950: Observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR
Fernando Camilo,P. Scholz,M. Serylak,M. Serylak,S. J. Buchner,M. Merryfield,M. Merryfield,Victoria M. Kaspi,Robert F. Archibald,Robert F. Archibald,Matthew Bailes,Andrew Jameson,W. van Straten,W. van Straten,John Sarkissian,John Reynolds,Simon Johnston,George Hobbs,T. D. Abbott,R. M. Adam,G. Adams,Tom Alberts,R. Andreas,K. M. B. Asad,K. M. B. Asad,D. E. Baker,T. Baloyi,E. F. Bauermeister,T. Baxana,T. G. H. Bennett,Gianni Bernardi,Gianni Bernardi,D. Booisen,Roy Booth,D. H. Botha,L. Boyana,L. R. S. Brederode,J. P. Burger,T. Cheetham,J. Conradie,J. P. Conradie,David B. Davidson,G. de Bruin,B. de Swardt,C. de Villiers,Dirk I. L. de Villiers,M. S. de Villiers,W. de Villiers,C. de Waal,M. A. Dikgale,G C Du Toit,L. J. du Toit,S. W. P. Esterhuyse,B. L. Fanaroff,S. Fataar,A. R. Foley,Griffin Foster,Griffin Foster,Dehann Fourie,R. R. G. Gamatham,T. Gatsi,Riana Geschke,Sharmila Goedhart,T. L. Grobler,S. C. Gumede,M. J. Hlakola,A. Hokwana,D. H. Hoorn,D. M. Horn,J. Horrell,B. Hugo,A. R. Isaacson,O. Jacobs,J. P. Jansen van Rensburg,Justin L. Jonas,B. Jordaan,A. F. Joubert,F. Joubert,Gyula I. G. Józsa,R. P. M. Julie,C. C. Julius,F. Kapp,Aris Karastergiou,Aris Karastergiou,Aris Karastergiou,F. Karels,MacCalvin Kariseb,Ramesh Karuppusamy,V. A. Kasper,E. C. Knox-Davies,D. Koch,P. P. A. Kotzé,A. Krebs,N. Kriek,H. Kriel,T. W. Kusel,S. Lamoor,Robert Lehmensiek,D. Liebenberg,I. Liebenberg,R. T. Lord,B. M. Lunsky,N. Mabombo,T. Macdonald,P. Macfarlane,K. Madisa,L. Mafhungo,L. G. Magnus,C. Magozore,O. Mahgoub,J. P. L. Main,S. Makhathini,J. A. Malan,P. Malgas,Jason Manley,M. Manzini,L. Marais,N. Marais,S. J. Marais,M. Maree,A. Martens,S. D. Matshawule,N. Matthysen,T. Mauch,L. D. Mc Nally,Bruce Merry,R. Millenaar,C. Mjikelo,N. Mkhabela,N. Mnyandu,I. P. T. Moeng,O. J. Mokone,T. E. Monama,K. Montshiwa,Vanessa A. Moss,M. C. Mphego,W. S. New,B. Ngcebetsha,K. J. Ngoasheng,H. Niehaus,P. Ntuli,A. Nzama,F. Obies,M. Obrocka,M. T. O. Ockards,C. Olyn,Nadeem Oozeer,Nadeem Oozeer,A. J. Otto,Y. Padayachee,S. S. Passmoor,A. A. Patel,S. Paula,A. Peens-Hough,B. Pholoholo,P. Prozesky,S. Rakoma,A. J. T. Ramaila,I. Rammala,Z. R. Ramudzuli,M. Rasivhaga,S. Ratcliffe,Howard C. Reader,R. Renil,L. Richter,A. Robyntjies,D. Rosekrans,A. Rust,S. Salie,N. Sambu,C. T. G. Schollar,L. C. Schwardt,S. Seranyane,G. Sethosa,C. Sharpe,R. Siebrits,S. K. Sirothia,M. J. Slabber,Oleg Smirnov,Stephanie Smith,L. Sofeya,N. Songqumase,R. Spann,Ben Stappers,D. Steyn,T. J. Steyn,R. Strong,A. Struthers,C. Stuart,P. Sunnylall,P. S. Swart,B. Taljaard,Cyril Tasse,Cyril Tasse,G. B. Taylor,I. P. Theron,V. Thondikulam,Kshitij Thorat,A. J. Tiplady,O. Toruvanda,J. van Aardt,T. J. van Balla,L. van den Heever,A. van der Byl,C.G. Van der Merwe,P. L. van der Merwe,P. C. van Niekerk,R. van Rooyen,J. P. van Staden,V. Van Tonder,R. van Wyk,I. Wait,A. L. Walker,B. H. Wallace,M. G. Welz,L. P. Williams,B. Xaia,N. Young,S. Zitha +218 more
TL;DR: In this article, radio and X-ray 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.
Journal ArticleDOI
The 1.28 GHz MeerKAT DEEP2 Image
T. Mauch,W. D. Cotton,James J. Condon,A. M. Matthews,A. M. Matthews,T. D. Abbott,R. M. Adam,M. A. Aldera,K. M. B. Asad,K. M. B. Asad,E. F. Bauermeister,T. G. H. Bennett,H. Bester,D. H. Botha,L. R. S. Brederode,Z. B. Brits,S. J. Buchner,J. P. Burger,Fernando Camilo,J. M. Chalmers,T. Cheetham,Dirk I. L. de Villiers,M. S. de Villiers,M. A. Dikgale-Mahlakoana,L. J. du Toit,S. W. P. Esterhuyse,G. Fadana,B. L. Fanaroff,S. Fataar,S. February,B. S. Frank,R. R. G. Gamatham,M. Geyer,Sharmila Goedhart,S. Gounden,S. C. Gumede,Ian Heywood,M. J. Hlakola,J. Horrell,B. Hugo,A. R. Isaacson,Gyula I. G. Józsa,Justin L. Jonas,R. P. M. Julie,F. Kapp,V. A. Kasper,J. S. Kenyon,P. P. A. Kotzé,N. Kriek,H. Kriel,T. W. Kusel,Robert Lehmensiek,A. Loots,R. T. Lord,B. M. Lunsky,K. Madisa,L. G. Magnus,J. P. L. Main,J. A. Malan,Jason Manley,S. J. Marais,A. Martens,Bruce Merry,R. Millenaar,N. Mnyandu,I. P. T. Moeng,O. J. Mokone,T. E. Monama,M. C. Mphego,W. S. New,B. Ngcebetsha,K. J. Ngoasheng,M. T. O. Ockards,Nadeem Oozeer,A. J. Otto,A. A. Patel,A. Peens-Hough,Simon Perkins,A. J. T. Ramaila,Z. R. Ramudzuli,R. Renil,L. Richter,A. Robyntjies,S. Salie,C. T. G. Schollar,L. C. Schwardt,M. Serylak,R. Siebrits,S. K. Sirothia,Oleg Smirnov,L. Sofeya,G. Stone,B. Taljaard,C. Tasse,C. Tasse,I. P. Theron,A. J. Tiplady,O. Toruvanda,S. N. Twum,T. J. van Balla,A. van der Byl,C.G. Van der Merwe,V. Van Tonder,B. H. Wallace,M. G. Welz,L. P. Williams,B. Xaia +106 more
TL;DR: In this paper, the confusion-limited 1.28 GHz MeerKAT DEEP2 image was used to measure the primary beam attenuation pattern, estimate telescope pointing errors, and pinpoint coordinate errors caused by offsets in frequency or time.
Journal ArticleDOI
Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event
Ian Heywood,Fernando Camilo,W. D. Cotton,Farhad Yusef-Zadeh,T. D. Abbott,R. M. Adam,M. A. Aldera,E. F. Bauermeister,Roy Booth,A. G. Botha,D. H. Botha,L. R. S. Brederode,Z. B. Brits,S. Buchner,J. P. Burger,J. M. Chalmers,T. Cheetham,Dirk I. L. de Villiers,M. A. Dikgale-Mahlakoana,L. J. du Toit,S. W. P. Esterhuyse,B. L. Fanaroff,A. R. Foley,Dehann Fourie,R. R. G. Gamatham,Sharmila Goedhart,S. Gounden,M. J. Hlakola,C. J. Hoek,A. Hokwana,D. M. Horn,Jasper Horrell,B. Hugo,A. R. Isaacson,Justin L. Jonas,J. D. B. L. Jordaan,A. F. Joubert,Gyula I. G. Józsa,R. P. M. Julie,F. Kapp,J. S. Kenyon,P. P. A. Kotzé,H. Kriel,T. W. Kusel,Robert Lehmensiek,D. Liebenberg,A. Loots,R. T. Lord,B. M. Lunsky,P. Macfarlane,L. G. Magnus,C. Magozore,O. Mahgoub,J. P. L. Main,J. A. Malan,R. D. Malgas,Jason Manley,Matthys Maree,Bruce Merry,Robert P. Millenaar,N. Mnyandu,I. P. T. Moeng,T. E. Monama,M. C. Mphego,W. S. New,B. Ngcebetsha,Nadeem Oozeer,A. J. Otto,S. S. Passmoor,A. A. Pate,A. Peens-Hough,Simon Perkins,S. Ratcliffe,R. Renil,A. Rust,S. Salie,L. C. Schwardt,M. Serylak,R. Siebrits,S. K. Sirothia,Oleg Smirnov,L. Sofeya,P. S. Swart,C. Tasse,D. T. Taylor,I. P. Theron,Kshitij Thorat,A. J. Tiplad,S. Tshongweni,T. J. van Balla,A. van der Byl,C.G. Van der Merwe,C. L. van Dyk,R. van Rooyen,V. Van Tonder,R. van Wyk,B. H. Wallace,M. G. Welz,L. P. Williams +98 more
TL;DR: Radio imaging reveals a bipolar bubble structure, with an overall span of 1 degree by 3 degrees, extending above and below the Galactic plane and apparently associated with the Galactic Centre, which is postulate to be 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.
Journal ArticleDOI
Revival of the magnetar PSR J1622-4950: observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR
Fernando Camilo,P. Scholz,M. Serylak,M. Serylak,S. J. Buchner,M. Merryfield,M. Merryfield,Victoria M. Kaspi,Robert F. Archibald,Robert F. Archibald,Matthew Bailes,Andrew Jameson,W. van Straten,John Sarkissian,John Reynolds,Simon Johnston,George Hobbs,T. D. Abbott,R. M. Adam,G. Adams,Tom Alberts,R. Andreas,K. M. B. Asad,K. M. B. Asad,D. E. Baker,T. Baloyi,E. F. Bauermeister,T. Baxana,T. G. H. Bennett,Gianni Bernardi,D. Booisen,Roy Booth,D. H. Botha,L. Boyana,L. R. S. Brederode,J. P. Burger,T. Cheetham,J. Conradie,J. P. Conradie,David B. Davidson,G. de Bruin,B. de Swardt,C. de Villiers,Dirk I. L. de Villiers,M. S. de Villiers,W. de Villiers,C. de Waal,M. A. Dikgale,G C Du Toit,L. J. du Toit,S. W. P. Esterhuyse,B. L. Fanaroff,S. Fataar,A. R. Foley,Griffin Foster,Dehann Fourie,R. R. G. Gamatham,T. Gatsi,Riana Geschke,Sharmila Goedhart,T. L. Grobler,S. C. Gumede,M. J. Hlakola,A. Hokwana,D. H. Hoorn,D. M. Horn,J. Horrell,B. Hugo,A. R. Isaacson,O. Jacobs,J. P. Jansen van Rensburg,Justin L. Jonas,B. Jordaan,A. F. Joubert,F. Joubert,Gyula I. G. Józsa,R. P. M. Julie,C. C. Julius,F. Kapp,Aris Karastergiou,Aris Karastergiou,Aris Karastergiou,F. Karels,MacCalvin Kariseb,Ramesh Karuppusamy,V. A. Kasper,E. C. Knox-Davies,D. Koch,P. P. A. Kotzé,A. Krebs,N. Kriek,H. Kriel,T. W. Kusel,S. Lamoor,Robert Lehmensiek,D. Liebenberg,I. Liebenberg,R. T. Lord,B. M. Lunsky,N. Mabombo,T. Macdonald,P. Macfarlane,K. Madisa,L. Mafhungo,L. G. Magnus,C. Magozore,O. Mahgoub,J. P. L. Main,S. Makhathini,J. A. Malan,P. Malgas,Jason Manley,M. Manzini,L. Marais,N. Marais,S. J. Marais,M. Maree,A. Martens,S. D. Matshawule,N. Matthysen,T. Mauch,L. D. Mc Nally,Bruce Merry,R. Millenaar,C. Mjikelo,N. Mkhabela,N. Mnyandu,I. P. T. Moeng,O. J. Mokone,T. E. Monama,K. Montshiwa,Vanessa A. Moss,M. C. Mphego,W. S. New,B. Ngcebetsha,K. J. Ngoasheng,H. Niehaus,P. Ntuli,A. Nzama,F. Obies,M. Obrocka,M. T. O. Ockards,C. Olyn,Nadeem Oozeer,A. J. Otto,Y. Padayachee,S. S. Passmoor,A. A. Patel,S. Paula,A. Peens-Hough,B. Pholoholo,P. Prozesky,S. Rakoma,A. J. T. Ramaila,I. Rammala,Z. R. Ramudzuli,M. Rasivhaga,S. Ratcliffe,Howard C. Reader,R. Renil,L. Richter,A. Robyntjies,D. Rosekrans,A. Rust,S. Salie,N. Sambu,C. T. G. Schollar,L. C. Schwardt,S. Seranyane,G. Sethosa,C. Sharpe,R. Siebrits,S. K. Sirothia,M. J. Slabber,Oleg Smirnov,Stephanie Smith,L. Sofeya,N. Songqumase,R. Spann,Ben Stappers,D. Steyn,T. J. Steyn,R. Strong,A. Struthers,C. Stuart,P. Sunnylall,P. S. Swart,B. Taljaard,Cyril Tasse,G. B. Taylor,I. P. Theron,V. Thondikulam,Kshitij Thorat,A. J. Tiplady,O. Toruvanda,J. van Aardt,T. J. van Balla,L. van den Heever,A. van der Byl,C.G. Van der Merwe,P. L. van der Merwe,P. C. van Niekerk,R. van Rooyen,J. P. van Staden,V. Van Tonder,R. van Wyk,I. Wait,A. L. Walker,B. H. Wallace,M. G. Welz,L. P. Williams,B. Xaia,N. Young,S. Zitha +213 more
TL;DR: In this paper, radio and X-ray 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.