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China’s FAST telescope discovers world’s first persistently active repeating fast radio burst
By Wu Yuehui, People’s Daily
An international research team led by Li Di, a researcher with the National Astronomical Observatories (NAO) under the Chinese Academy of Sciences, lately detected and localized FRB 20190520B, the world’s first and only persistently active repeating fast radio burst (FRB) so far, with the help of China’s Five-hundred-meter Aperture Spherical Radio Telescope (FAST), known as the “China Sky Eye”.
The discovery was made through the Commensal Radio Astronomy FAST Survey (CRAFTS), a novel and unprecedented commensal drift scan survey of the entire sky visible conducted with FAST.
The study was published in international academic journal Nature on June 9, 2022, Beijing time.
FRB is the brightest radio burst known in the universe, and can release within one millisecond as much energy as that radiated by the sun in about a whole year. Nearly 500 FRBs have been reported worldwide, among which less than 10 are active with frequent bursts in certain phase windows. No persistently active repeating FRB had been found until now.
As the world’s largest single-dish radio telescope, the “China Sky Eye” began searches for FRBs several years ago. On May 20, 2019, scientists detected a repeating FRB using FAST, which was later named FRB 20190520B.
When it was first detected, the FRB already showed signs of activity, according to Niu Chenhui, first author of the paper and a young scholar at the NAO.
“We detected three bursts within 10 seconds under one wave beam. Twenty seconds later, we detected one more burst when another wave beam swept it,” Niu recalled.
Based on the time of these four earliest bursts detected through the drift scan survey using the FAST and the pointing location from the telescope, researchers narrowed down the source of the bursts, providing more accurate and reliable information about the FRB’s location for follow-up study.
Later, through observations carried out using multiple pieces of international astronomical equipment and on the basis of data from interferometer arrays and optical telescope, researchers concluded that the host galaxy of FRB 20190520B is a dwarf galaxy with a redshift of 0.241 that is 3.3 billion light-years away from the Earth.
According to Li, the world’s first persistently active repeating FRB has shown features that are more distinct in many aspects than those of FRB 20121102A, the first repeating FRB found by humankind in 2016.
While FRB 20121102A was only active in certain periods, active and repeated bursts of the FRB 20190520B have never ceased, with several hundred bursts already detected by the “China Sky Eye”, Li pointed out.
Continuous observations using the FAST are expected to help create a brand new evolution roadmap of the FRBs, Li said.
The discovery of the world’s first persistently active repeating FRB has challenged traditional views about chromatic dispersion analysis of FRBs, and laid a foundation for modeling the evolution of FRBs and understanding this violent and mysterious phenomenon in the universe, Li added.
After they were published, the preliminary results of the study have attracted widespread attention from the international astronomical community. The important discovery has been followed by several articles on FRB modeling, with their topics covering FRB scattering timescale models, supernova explosion explanations, etc.
The CRAFTS has found at least six new FRBs, making unique contributions to uncovering the mechanisms of this mysterious phenomenon in the universe and advancing research in this new field of astronomy.
Inna Lillahi wa Inna Ilaihir-Raji’un.
The Chairman and Editor-in-Chief of , Hon. Inuwa Bwala, on behalf of the management and staff, has expressed deep sorrow over the death of veteran journalist and pioneer editor of the newspaper, Abdulazeez Suleiman.
Bwala also extended condolences to Suleiman’s family, associates and the Nigerian media industry, describing his passing as a monumental loss at a time his experience, courage and service to the nation were still greatly needed.
Suleiman reportedly died shortly before a scheduled surgery.
A pioneer editor of National Trail Newspaper, Abdulazeez Suleiman was regarded as a thoroughbred journalist with a remarkable talent for breaking exclusive stories and shaping public discourse through responsible journalism.
Throughout his distinguished career, he worked with notable media organisations, including National Trail Newspaper, Daily Trust, Summit and The Road. He earned widespread admiration for fearless reporting, ethical conduct and unwavering commitment to professionalism.
His writings and public interventions consistently reflected deep concern for justice, peace, accountability and national unity.
Beyond journalism, Suleiman was widely respected as a bridge-builder who strongly believed in dialogue, mutual understanding and peaceful coexistence among Nigeria’s diverse peoples. He remained steadfast in his conviction that truth and justice are essential pillars for national progress.
Though his voice has now gone silent, the values and ideals he stood for will continue to inspire generations. His legacy as a principled journalist, advocate and patriot will endure in the hearts of many whose lives he touched through his work and humanity.
The management and staff of National Trail Newspaper prayed Almighty Allah to forgive his shortcomings, grant him Aljannatul Firdaus and comfort his family, friends, colleagues and members of the in this moment of grief.
Rest in peace, Abdulazeez Suleiman. Your service and legacy will not be forgotten.
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JUST IN: After Primary Election Victory, Shehu Sani Visits Parents’ Graves to Offer Prayers and Express Gratitude to God
Following his victory in the party primary election, Senator Shehu Sani visited the graves of his parents to pray and give thanks to Almighty God.
The former senator described the visit as very important to him, noting that his parents played a significant role in his upbringing and in shaping his political life.
Shehu Sani prayed for Allah to forgive his parents and all deceased Muslims, while also reaffirming his commitment to continue serving the people with honesty and integrity after securing victory in the primaries.
The gesture has attracted attention from his supporters and social media users, many of whom praised his act of remembering his parents after a political success.
Inna Lillahi wa Inna Ilaihir-Raji’un.
The Chairman and Editor-in-Chief of , Hon. Inuwa Bwala, on behalf of the management and staff, has expressed deep sorrow over the death of veteran journalist and pioneer editor of the newspaper, Abdulazeez Suleiman.
Bwala also extended condolences to Suleiman’s family, associates and the Nigerian media industry, describing his passing as a monumental loss at a time his experience, courage and service to the nation were still greatly needed.
Suleiman reportedly died shortly before a scheduled surgery.
A pioneer editor of National Trail Newspaper, Abdulazeez Suleiman was regarded as a thoroughbred journalist with a remarkable talent for breaking exclusive stories and shaping public discourse through responsible journalism.
Throughout his distinguished career, he worked with notable media organisations, including National Trail Newspaper, Daily Trust, Summit and The Road. He earned widespread admiration for fearless reporting, ethical conduct and unwavering commitment to professionalism.
His writings and public interventions consistently reflected deep concern for justice, peace, accountability and national unity.
Beyond journalism, Suleiman was widely respected as a bridge-builder who strongly believed in dialogue, mutual understanding and peaceful coexistence among Nigeria’s diverse peoples. He remained steadfast in his conviction that truth and justice are essential pillars for national progress.
Though his voice has now gone silent, the values and ideals he stood for will continue to inspire generations. His legacy as a principled journalist, advocate and patriot will endure in the hearts of many whose lives he touched through his work and humanity.
The management and staff of National Trail Newspaper prayed Almighty Allah to forgive his shortcomings, grant him Aljannatul Firdaus and comfort his family, friends, colleagues and members of the in this moment of grief.
Rest in peace, Abdulazeez Suleiman. Your service and legacy will not be forgotten.
Dr. Nafiu Sankara Emerges as Kano Central Senatorial Candidate Ahead of the Next Elections
National Trail Mourns Pioneer Editor, Abdulazeez Suleiman
Hon. Jaafaru Yakubu Declared Winner of Bali/Gassol Federal Constituency in Taraba
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