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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

Protection of Information bill- opinions from our experts
2011-11-28

Prof. Hussein Solomon
Senior Professor in the Department of Political Science at the University of the Free State. 

In recent years, given their failure to effectively govern, the ANC has become increasingly defensive. These defensive traits have become particularly acute in light of the various corruption scandals that members of the ruling party involve themselves in.
 
Given the fact that for now they are assured of an electoral majority (largely on account of their anti-apartheid credentials), coupled with the fact that they have managed to make parliament a rubber stamp of the executive as opposed to holding the executive accountable, it is the media which has increasingly held the ruling party to account by exposing such corruption and incompetence in government.
 
The passing of the information bill, therefore, is not merely an attack on the media, but an attack on the pivotal issue of accountability. Without accountability, there can be no democracy.
 
By defining national interest broadly, by refusing to accept a public interest clause in the bill, the ANC increasingly shows its disdain to South Africa's constitution and its citizens.
 
More importantly, as former Minister of Intelligence and ANC stalwart Ronnie Kasrils pointedly makes clear, the ANC is also betraying its own noble struggle against the odious apartheid regime. It was the media which played a key role in exposing apartheid's excesses, it is the same media which is coming under attack by the heirs of PW Botha's State Security Council - Minister of State Security Siyabong Cwele and his security apparatchiks whose mindsets reflect more Stalin's Gulag's than the values of the Freedom Charter.
 
The passing of this bill is also taking place at a time when journalists have had their phones attacked, where the judiciary has been deliberately undermined and parliament silenced.
 
Democrats beware!

 
Prof. Johann de Wet
Chairperson: Department of Communication Science 
 
The ANC’s insistence on passing the Protection of State Information Bill in its current form and enforcing it by law, means that the essence of our democratic state and the quality of life of every citizen is at stake.
 
Yes, our freedom as academics, researchers, mass media practitioners and citizens comes into play. Freedom implies the right to choose and is, along with equality, an underlying principle which helps make democracy happen. While the South African state needs to protect (classify) information which could threaten its security and/or survival, the omission of a public interest clause in the Bill at this stage effectively denies a citizen the right to freedom of information.
 
 Freedom of information, along with press freedom, freedom of speech, freedom of assembly, freedom of association and religious freedom, are essential to democracy. These freedoms are granted because they conform to basic liberal ideas associated with (Western) democracy and which resonate with South Africa’s liberal constitution, such as (1) belief in the supreme value of the individual (and thus not of the state); (2) belief that the individual has natural rights (rights which belong to all human beings by nature – such as the right to life and to control government)) which exist independently of government, and which ought to be protected by and against government; and (3) recognition of the supreme value of the individual. 
 
One wonders how many cases of South African government corruption and mismanagement would have been uncovered by investigative journalists over the past number of years if this Bill in its current form was on the statute books. This Bill represents a backward step from the promise of democracy of having an informed public. The former National Party government had similar laws in place and one does not want to go there again. The infamous Information Scandal in South Africa of some thirty years ago, or Muldergate as it has come to be known, reminds one of what governments can do when it works clandestinely.
 
What South Africans need, is more information on what government structures are doing and how they are doing it with taxpayers’ money, not less information. While information in itself does not equal communication or dialogue, it is an indispensable part thereof, and the need for dialogue based on verifiable information is urgent for meeting vexed challenges facing South African communities. Academics in all fields of specialisation are constantly in need of untainted information to pursue answers and/or offer solutions to where South Africa should be moving in all spheres of life.

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