Using Namibia’s High Energy Stereoscopic System (HESS), astronomers have recorded the most powerful and longest gamma-ray afterglow from one of the brightest explosions in the universe, a gamma-ray burst. On August 29, 2019, a long gamma ray cracked by a jet of elements moving at almost the speed of light revealed because of the collapse of a long star. This event, known as GBR 190829, quickly detected the Fermi and Swift satellites and then quickly launched the HES. Immediately the afterglow became visible. This immediate response and the fact that the event is relatively close (1 billion light-years away) means there are some incredible insights into this kind of event.
The outlook was tracked for three days after the gamma-ray burst and recorded a trillion times more powerful than the gamma-ray visible light. As published in Science, Observations have shown that the enthusiastic emission of afterglow, X-rays and gamma rays, indicates a normal production process. Co-author Dr Andrew Taylor from the Deutsches Elektronen-Synchrotron (DESY) said in a statement, “We were really sitting in the front row after this gamma-ray burst.”
“We can store several days and unprecedented gamma-ray energy.” “Our observations revealed a striking resemblance between X-rays and subsequent attacks of extremely high-energy gamma-ray bursts,” added Dr. Sylvia Zhu from Daisy. This is a particularly interesting observation because the leading theories suggest that two separate processes produced X-rays and gamma rays, but that the binoculars did not match what they saw here.
“It would be rather unexpected for X-ray and very high-energy gamma-ray energy bands to adopt similar spectral and transient properties if the emission of these two energy ranges is generated separately,” said renowned co-author Dmitry Khangulyan from the University of Rikkyo in Tokyo. The fourth gamma ray found in the ground at GBR 190829 exploded. The previous three were much longer distances, their afterglow was observable for a short time and they seemed much weaker, so such a detailed analysis was not possible.
Clearly, however, H.S, in addition, other instruments may study these events in more detail. “Looking to the future, the possibility of gamma-ray detection by the current generation of Cherenkov telescope arrays in Chilean Andes and La Palmer Canary Islands is promising,” said HSS, Heidelberg representative Stefan Wagner at Landessternwarte.
“The sheer abundance of gamma-ray bursts leads us to expect that regular detections of very high-energy bands will become rather common and help us fully understand their physics.”
