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20 April 2021 | Story Cornelius Hagenmeier

On 25 May 2021, Africa will celebrate the 58th anniversary of the founding of the Organisation of African Unity (OAU). A central tenet of the organisation, which was the predecessor of the African Union (AU), is African solidarity. This call celebrates the idea and the ideal of African solidarity. As we are preparing for Africa Month 2021, we received the shocking news about the damage to the University of Cape Town’s African Studies collection. The need for African solidarity to mitigate this immense loss has inspired the theme of the 2021 UFS virtual Africa Month celebration, ‘solidarity in knowledge production and recording’.

From the establishment of the OAU and with the later formation of the AU, member states undertook to coordinate and intensify their cooperation and efforts to achieve a better life for the people of Africa.

Africa Day Memorial Lecture

The UFS has a long tradition of commemorating Africa Day and the ideas underpinning it. Every year, diverse events aimed at advancing African unity and solidarity take place during Africa Month –traditionally, the highlight is the Africa Day Memorial Lecture hosted by the University's Centre for Gender and Africa Studies. On 19 May 2021 at 19:00 (SAST), Prof Walter D Mignolo, a guru of decoloniality, will virtually deliver this year’s lecture titled The beauty of the sovereign people: Jean Casimir and the Decolonial History of Haiti, to honour the memory of transatlantic slavery by reflecting on former ambassador, Prof Jean Casimir, who has shifted the geography of reasoning by breaking the code of the standard history of the slave trade, the African diaspora in the Caribbean, and of captive human beings in the plantations. The discussant will be CGAS Extraordinary Professor and Professor of Epistemologies of the Global South at the University of Bayreuth, Prof Sabelo J Ndlovu-Gatsheni.  

As COVID-19 continues to ravage the world, Africans have been fighting against the pandemic in various ways and have achieved considerable success in this regard. Given the economic and social challenges associated with the pandemic, fostering African solidarity and further developing the underpinning philosophy of ubuntu appear to be particularly worthwhile projects.

A virtual celebration of Africa Month

The UFS 2021 Africa Month commemorations will again take a virtual format. It will include a focus on UFS engagement on the continent, partnerships with other African institutions, research excellence, and student success stories.  The UFS invites all members of its community to contribute thought-provoking pieces to this virtual celebration of Africa Month. Selected contributions will be presented on the university's website and social media.

Among other formats, contributions may take the format of

  • recorded performing art performances (e.g., solo music or poetry);
  • virtual visual art presentations;
  • written poetry;
  • songs;
  • short thought/opinion pieces, which can also be published in mainstream media; or
  • topical academic writings.

Please share a brief written proposal explaining your planned contribution by 30 April 2021. The proposal should not exceed 300 words and should be emailed to Cornelius Hagenmeier (hagenmeiercca@ufs.ac.za) or Prof Colin Chasi (ChasiCT@ufs.ac.za).

News Archive

UFS physicists publish in prestigious Nature journal
2017-10-16

Description: Boyden Observatory gravitational wave event Tags: Boyden Observatory, gravitational wave event, Dr Brian van Soelen, Hélène Szegedi, multi-wavelength astronomy 
Hélène Szegedi and Dr Brian van Soelen are scientists in the
Department of Physics at the University of the Free State.

Photo: Charl Devenish

In August 2017, the Boyden Observatory in Bloemfontein played a major role in obtaining optical observations of one of the biggest discoveries ever made in astrophysics: the detection of an electromagnetic counterpart to a gravitational wave event.
 
An article reporting on this discovery will appear in the prestigious science journal, Nature, in October 2017. Co-authors of the article, Dr Brian van Soelen and Hélène Szegedi, are from the Department of Physics at the University of the Free State (UFS). Both Dr Van Soelen and Szegedi are researching multi-wavelength astronomy.
 
Discovery is the beginning of a new epoch in astronomy
 
Dr van Soelen said: “These observations and this discovery are the beginning of a new epoch in astronomy. We are now able to not only undertake multi-wavelength observations over the whole electromagnetic spectrum (radio up to gamma-rays) but have now been able to observe the same source in both electromagnetic and gravitational waves.”
 
Until recently it was only possible to observe the universe using light obtained from astronomical sources. This all changed in February 2016 when LIGO (Laser Interferometer Gravitational-Wave Observatory) stated that for the first time they had detected gravitational waves on 14 September 2015 from the merger of two black holes. Since then, LIGO has announced the detection of two more such mergers. A fourth was just reported (27 September 2017), which was the first detected by both LIGO and Virgo. However, despite the huge amount of energy released in these processes, none of this is detectable as radiation in any part of the electromagnetic spectrum. Since the first LIGO detection astronomers have been searching for possible electromagnetic counterparts to gravitational wave detections. 
 
Large international collaboration of astronomers rushed to observe source
 
On 17 August 2017 LIGO and Virgo detected the first ever gravitational waves resulting from the merger of two neutron stars. Neutron star mergers produce massive explosions called kilonovae which will produce a specific electromagnetic signature. After the detection of the gravitational wave, telescopes around the world started searching for the optical counterpart, and it was discovered to be located in an elliptical galaxy, NGC4993, 130 million light years away. A large international collaboration of astronomers, including Dr Van Soelen and Szegedi, rushed to observe this source.
 
At the Boyden Observatory, Dr Van Soelen and Szegedi used the Boyden 1.5-m optical telescope to observe the source in the early evening, from 18 to 21 August. The observations obtained at Boyden Observatory, combined with observations from telescopes in Chile and Hawaii, confirmed that this was the first-ever detection of an electromagnetic counterpart to a gravitational wave event. Combined with the detection of gamma-rays with the Fermi-LAT telescope, this also confirms that neutron star mergers are responsible for short gamma-ray bursts.  
 
The results from these optical observations are reported in A kilonova as the electromagnetic counterpart to a gravitational-wave source published in Nature in October 2017.
 
“Our paper is one of a few that will be submitted by different groups that will report on this discovery, including a large LIGO-Virgo paper summarising all observations. The main results from our paper were obtained through the New Technology Telescope, the GROND system, and the Pan-STARRS system. The Boyden observations helped to obtain extra observations during the first 72 hours which showed that the light of the source decreased much quicker than was expected for supernova, classifying this source as a kilonova,” Dr Van Soelen said.

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