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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

Prof Loyiso Jita appointed as UFS Dean of Education
2017-11-22

 Description: Prof Melanie Walker, Research chair into Higher Education gets boost for five more years Tags: Prof Melanie Walker, Research chair into Higher Education gets boost for five more years

Prof Loyiso Jita, UFS Dean of Education
Photo: Johan Roux

The Council of the University of the Free State (UFS) has approved the appointment of Prof Loyiso Jita as Dean of Education during its quarterly meeting held on the Bloemfontein Campus on 17 November 2017.

“Prof Jita has a strong academic background and a good understanding of the higher-education sector. I look forward to working with him and to realise the vision of the university as a research-led, student-centred and regionally engaged university that contributes to development and social justice through the production of globally competitive graduates and knowledge,” says Prof Francis Petersen, UFS Rector and Vice-Chancellor.

“It is indeed a privilege for me to lead a team of committed teachers and researchers in the faculty, providing excellent service to our undergraduate and postgraduate students. I thank the Council and executive management for their trust in me,” says Prof Jita.

In January 2017, Prof Jita was appointed as the Acting Dean of the Faculty of Education at the UFS. He will assume the position of Dean of the Faculty of Education on 1 December 2017.

Prof Jita began his career as a Science and Mathematics teacher, after graduating from Wits University in 1988. He later took up a lectureship position at the University of Zululand, where he was awarded a Fulbright scholarship to read for a PhD at Michigan State University in the USA. In the mid-1990s, he worked as a policy researcher at the University of KwaZulu-Natal where he, among others, helped to compile the submission on the Violation of Educational Rights of South Africans during apartheid, to the Truth and Reconciliation Commission (TRC).

He joined the University of Pretoria (UP) in 2001, after returning from a post-doctoral fellowship at the Northwestern University in Chicago, and was later appointed Director of the Joint Centre for Science, Mathematics and Technology Education (JCSMTE). He left the UP in 2008 for an appointment as an associate professor at the University of South Africa (Unisa), where he later became the inaugural Director of the School of Education. In 2011, he became a full professor and was appointed as the acting Deputy Executive Dean in the College of Human Sciences at Unisa.

In 2012, he joined the UFS as Research Professor in the School of Mathematics, Natural Sciences, and Technology Education. In November 2014, he was appointed as the SANRAL Chair for Science and Mathematics Education. Professor Jita has published many articles on instructional leadership, teacher development and change, Science and Mathematics education, and has presented over 50 papers at local and international conferences. He has also supervised to completion more than 37 master’s and PhD graduates, and is currently the editor-in-chief for the accredited journal, Perspectives in Education (PIE).

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