Independent positioning of "Jimu" satellites and joint positioning with other telescopes.
Photo courtesy of Institute of High Energy, Chinese Academy of Sciences
China News Service, Beijing, January 21 (Reporter Sun Zifa) The reporter learned from the Institute of High Energy Physics of the Chinese Academy of Sciences (Institute of High Energy Physics, Chinese Academy of Sciences) on the 21st that the gravitational wave storm high-energy electromagnetic counterpart all-sky monitor (named " The Huairou-1 Polar Eye Telescope (GECAM) recently observed the celestial explosion event numbered GRB 210119A and released it to the international astronomical community in time. This is the first celestial explosion event detection result released by the "Extreme Eye" satellite team.
After the "Extreme Eye" binary star entered orbit, the payload is in good condition, and all functions have been effectively verified. Previously, gamma-ray bursts, Earth eclipse in Scorpio X-1, X-ray pulsars, solar flares, and high-energy universe have been successfully observed. The scientific research team predicts that there will be abundant scientific output in the future.
According to the "Jimu" satellite team, the latest GRB 210119A celestial body explosion event occurred at 10:54:09.85 on January 19, 2021 Beijing time. According to the light curve of each energy segment observed by the "Jimu" satellite, the The duration of the second burst is about 50 milliseconds, and it is likely to be a short gamma burst, but it is not ruled out that it is a new magnetar burst. The specific results need to be further studied.
The "Jimu" satellite observed the light curve of the burst event GRB 210119A.
Photo courtesy of Institute of High Energy, Chinese Academy of Sciences
The observation results also show that the "Zhumu" satellite has better detection capabilities in low-energy X-ray energy regions than other high-energy all-sky monitors. The observation data clearly shows that the explosion event has a longer radiation time scale in the low-energy region. And there is a delay relative to the high-energy region radiation.
Although the "Jimu" satellite is still in the orbit test stage, under the close coordination of the satellite Xi'an and Beijing test teams, the "Jimu" satellite downloads the observation data in time, and the data analysis team immediately carried out rapid analysis.
In the early morning of January 20th, Beijing time, the "Jimu" satellite team released the observation announcement of the celestial explosion event GRB 210119A on the International Gamma Burst Coordination Network (GCN) for the first time, marking that the "Jimu" satellite began to provide timely observations to the international astronomy community. , To contribute to the joint observation and research of explosive celestial bodies in the "multi-band, multi-messenger" astronomical era.
At the same time, the scientific research team used the observation data of the "Jimu" satellite itself to locate the outbreak, and conducted a joint analysis on the data of the "Jimu" satellite, the "HXMT" (HXMT) satellite and the American Fermi satellite. The results show that the individual positioning and joint positioning results of the "Jimu" satellite are consistent with the precise positioning results of the American Swift satellite with imaging capabilities, which also preliminarily verifies the accuracy of the "Jimu" satellite observation data and positioning capabilities.
As the first scientific satellite of the second phase of the Chinese Academy of Sciences' Space Science Pilot Technology Special Project, the "Zhumu" satellite was launched into orbit in mid-December 2020 in the form of "one arrow and two stars". It is China's first all-sky monitoring gravitational wave electromagnetic counterpart satellite , Is also the first scientific satellite after the launch of the Space Science Laboratory of the Comprehensive National Science Center in Huairou, Beijing.
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