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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).

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It takes a village to raise a child
2016-06-13

Description: Valentino_Student Bursary Fund Campaign Tags: Valentino_Student Bursary Fund Campaign

Valentino Ndaba
Photo: Sonia Small

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Student Bursary Fund Campaign launched: #FundAFuture and make a difference
Motho ke motho ka batho. A person is a person through others

Want to make a difference in the world? Here is how

South Africa has one of the most spectacular coastlines in the world. Take the ribbon of golden beaches sweeping along the shores of KwaZulu-Natal, for instance. But just beyond the kiteboards dappling the ocean and fields of swaying sugarcane lies one of the largest informal settlements in the province: Amaoti. A place where barefoot children are skipping alongside poverty, and violent crime incinerates hope.

Nonetheless, that place could not keep Valentino Ndaba from graduating at the University of the Free State (UFS), and setting her sails for post-graduate studies.

A village
It takes a village to raise a child. This African proverb ripples across Valentino’s life story. “My gran always used to say education is your eternal bread. She still says it to this day. She has always instilled in me the importance of education,” Valentino smiles. Her grandmother has been but one of several champions in Valentino’s life.

Maalthee Dayaram – a teacher at Brookdale Secondary School that Valentino attended – noticed a budding talent in the young girl’s writing. With dedicated attention and ceaseless encouragement, Mrs Dayaram helped pave the way for this young writer. “You might be talented and have potential, but having someone actually believe in you and tell you that you have potential makes such a difference,” Valentino says. “I fell in love with writing, and had an idea that writing might be my future.” Dire economic circumstances threatened to snuff out any sparks of hope from that fragile future, though.

Aided by Lungisani Indlela (a non-profit organisation that provides children in the Amaoti area with school fees, uniforms, shoes, etc), Valentino clung to faith in the power of education. With unwavering single-mindedness, she consistently earned top grades.

Description: Valentino Ndaba 2 Tags: Valentino Ndaba 2

Photo: Sonia Small

Not if, but when
“Dreaming of my future, my gran would always say to me, ‘when you go to university’ or ‘when you have graduated’, this and that will follow.” Her gran’s words proved to be prophetic. As the final matric results were published in early January 2012, Valentino received a phone call that would change her life irrevocably.

That call came from the well-known South African humanitarian, Tich Smith. “Would you be willing to go to university in another province?” Smith asked. Never having travelled beyond her immediate surroundings, Valentino’s brave answer was: “Yes.”

A few days later, she walked onto the Bloemfontein Campus of the UFS.

Changing futures

Valentino proceeded to obtain a BA degree in Media Studies and Journalism in 2014. She has now set her sights on an honours degree, and envisions pursuing a Master’s degree in creative writing overseas.

“Without the support I received, I would have been stuck without a future,” she says. “University has shaped me into a better version of myself. I’ve grown intellectually, spiritually, and emotionally.”

You can bring about the same change for other students in need. By contributing to the UFS Student Bursary Fund Campaign, you can change the future not only of individuals, but of communities and of our country as well.

The impact of your financial support reaches far beyond its monetary value. It pulls families from poverty. It sends forth experts and visionaries into the world. It sets in motion a culture of giving.

Visit our Giving page for ways to contribute.

 

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