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31 January 2023 | Story Leonie Bolleurs | Photo Leonie Bolleurs
UFS unveiled new spectrograph
Assisting Prof Richard Gray with the installation of the spectrograph and the polarimeter were the Electronics and Instrumentation departments at both the UFS and the ASU. Left from the spectrograph, are from the left, front: Innes Basson, Head of the Department of Electronics and Instrumentation, Prof Pieter Meintjes, Senior Professor in the Department of Physics, Mark Jackson, Department of Electronics and Instrumentation, Hélène Szegedi, Lecturer in the Department of Physics, and Prof Richard Gray. At the right, from the spectrograph, front, are Natali Matchelt, master’s student, Izak van der Westhuizen, Lecturer in the Department of Physics; Barend Crous, Department of Electronics and Instrumentation; middle: Wian Smit, master’s student, Joleen Barnard, master’s student; back: Kobus Krüger, Department of Electronics and Instrumentation, Henri Roodt, Department of Electronics and Instrumentation; and Dr Hendrik van Heerden, Department of Physics.

The University of the Free State (UFS) is gearing up to be a leading academic institution in astronomical research. The institution successfully mounted a spectrograph with a polarimeter to the Boyden Observatory 1,5-m telescope that will provide scientists with visual access to both the Northern and Southern Hemispheres. 

The instrument, which can be accessed from Boyden, an astronomical research observatory and science education centre a few kilometres outside Bloemfontein, will allow researchers such as the Astrophysics Group at the UFS to do simultaneous polarimetry and spectroscopy of astronomical sources. This is vital for the research they are working on.

Mounting the spectrograph to the telescope and installing the polarimeter completed the upgrade of the 1,5-m telescope and is a leap forward for the astrophysics group at the UFS. The upgraded telescope with the spectropolarimeter, with a valued cost of R1.5 million, will also provide unique opportunities for collaborative research between the Astrophysics Groups at the UFS and researchers from the Appalachian State University (ASU). This adds greatly to the astrophysics research capacity at the university.
 
Prof Richard Gray, who 2019 started with the development of the astronomical spectrograph for the UFS Department of Physics, is a world-renowned expert in stellar spectroscopy, from the Department of Physics and Astronomy at ASU in North Carolina in the US. He was mainly responsible for the development and building of the instrument. 

Prof Pieter Meintjes, Senior Professor from the UFS Department of Physics, describes the moment that installation was completed as a feeling of enormous relief. “It took many hours of hard work, planning and testing to marry the 90-year 1,5-m telescope with the new sophisticated instrument,” he says. 

Adding value to graduate programme

Besides the development and installation of the spectrograph, Prof Gray also designed and built a polarimeter which can be integrated with the spectrograph. When placed inside the spectrograph, this piece of equipment transforms the spectrograph into a spectropolarimeter, giving it additional functionality. “This allows us, for example, to detect and analyse polarised light. It enables us to study the effect of magnetic fields in astronomical sources which introduce various polarisation signatures that can be detected with the polarimeter,” explains Prof Gray.

“I am fascinated by the polarimetric capabilities that we never had before. It is a great step forward,” remarks Prof Meintjes. 

“The Department of Electronics and Instrumentation at the UFS played an enormous role in the building of several components of the instrument that Prof Gray designed, as well as getting the 1.5-m telescope research ready so that the completed instrument could be mounted to the telescope”, says Prof Meintjes

He envisages that the research instrument will be ready for research purposes by March this year. Up till then researchers, graduates, and third-year students will have the opportunity to spend time on the spectrograph to familiarise themselves with it.

polarimeter
Prof Richard Gray posing with the polarimeter. With him is Prof Pieter Meintjes. (Photo: Leonie Bolleurs)


“Once installation is finalised, the UFS will be the only academic institution in South Africa with access to a 1.5-m telescope paired with a spectrograph. This gives us an edge in terms of our astrophysics programme and the training we provide our students. It also adds so much value to our graduate programme,” he says.

New instrument provides much flexibility

The spectrograph offers Prof Meintjes many possibilities for his research, and he is eager to put the instrument to use. To study binary systems as well as the jets of Active Galactic Nuclei (AGN), you need a spectrograph, preferably with polarimetric capabilities. It can also be applied to finding elements at the surface levels of stars so that their chemical composition can be determined.

“In the past, we needed to send our researchers to Sutherland and they were never guaranteed clear skies. Having this facility gives us so much flexibility,” he says.

 

Tsebo Matsoso and Siphephelo Ndlovu

Prof Brian van Soelen from the Department of Physics will be a key user of the spectrograph for his research. He is also playing an important role in terms of postgraduate training and research where the spectrograph is applied. 

Photo: Mart-Mari Duvenhage

  

 


The polarimeter converts the spectrograph to a spectropolarimeter. This instrument, which is mounted on a telescope (in the case of the UFS, it is mounted on the Boyden 1,5-m telescope) enables the user to detect whether radiation from  astronomical objects are polarised and to analyse the level of polarisation of the  light. Scientists can then, for instance, study the effect of magnetic fields in astronomical sources, which introduce various polarisation signatures (typically with a characteristic  level of polarisation).

News Archive

Professor launches his book, opposition parties attend
2011-03-22

Prof. Hussein Solomon
Photo: Stephen Collett

“We are good in opposing people, but we’re less good in opposing ideas.” This was how Prof. Jonathan Jansen, Vice-Chancellor and Rector of the University of the Free State (UFS) introduced the book launch of Against all Odds: Opposition Politics in Southern Africa.

The event was hosted in collaboration with the publisher under the title: Are opposition parties in South Africa in a crisis? This formed part of a series of dialogue sessions, organised by the Centre for Africa Studies, in the run up to the local elections.
 
Amongst those interested who attended the evening in the Senate Hall of the CR Swart Building on the Main Campus were various politicians, students, staff en a panel consisting of academics and the respective provincial representatives of the ANC and DA.
 
Dr Mcebisi Ndletyana from the Human Sciences Research Council (HSRC), acted as arbiter.
 
Proff. Hussein Solomon, author of Against all Odds: Opposition Politics in Southern Africa, also lecturer at the UFS, as well as Dirk Kotzé, Head of the Department of Political Science at Unisa, delivered enriching lectures on the stance and positioning of opposition parties.
 
Prof. Hussein, who spoke first, circumscribed the context of the political climate in the country, based on his book. “The problem that political science encounters is that everybody becomes experts on the internet, while they have no experience of what is happening in South Africa.” He said that when political parties in the country are under discussion, voters often allow myths and/or stereotyping to influence their concept of it. ‘’If there are no opposition parties, there is no democracy and people are deprived of their vote.”
 
Prof. Kotzé stated in his speech that it was not only opposition parties who had to make the government watch its step, but also the status that the country acquired, amongst others, from its connections, i.e. collaborative agreements such as BRICSA and the country’s inclusion in the G20. He left the audience with a question about how they were going to become involved in politics, and with his rhetoric question referred to options like social networks and movements.
 
Mr Sibongile Besani, the ANC'S secretary in the Free State, said the DA grew due to it’s swallowing of other parties; something he claims is taking the country backwards. He also described the use of personalities by opposition parties as means of association a weakness. He added that voters will continue voting for the ANC because they can associate themselves with the party’s vision.
 
In contrast, Mr Roy Jankielsohn, provincial leader of the DA, said voters and parties unite under their core vision for the country as like in the case of the ANC during the liberation struggles.
 
During the question-and-answer session, which followed after Mr Jankielson’s speech, Prof. Kwandiwe Kondlo, upon completion and summary of the discussions, stated firmly that the opposition parties are in a crisis. “The start of the solution is to recognise the problem. That is why our democracy finds itself in the state in which it is; because the opposition does not fulfil the role that they are supposed to fulfil.“ Prof. Kondlo is the head of the Centre of Africa Studies at the UFS.
 
He concluded by stating that the economic basis in the country was not transformed. “We cannot say that people determine their futures if they posses nothing. Opposition parties must start to communicate at this level in order to table something new. Our democracy must become more inclusive at political and material level.”

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