The cover image of “Science China Physics, Mechanics & Astronomy” featuring EP240408a. (IMAGE)
Caption
Above is an image of EP240408 on the X-ray detector captured by the WXT. In the upper right corner, the constellation Taurus is displayed, along with two labeled celestial objects: SN1054 and “Tianguan.” Both objects illustrate EP's commitment to detecting transient sources, as well as the origin of EP's alternate name, "Tianguan."（"Tianguan guest star". "Guest star" is the term used in ancient Chinese to refer to transient events, mostly novae and supernovae bright enough to naked eyes of human at that time. Since as early as the Han dynasty more than 2000 years ago, ancient Chinese had observed and recorded several dozens of the outburst phenomena such as novae and supernovae. The observation and documenting of the supernova SN1054, whose debris has later evolved to become the well-known supernova remnant Crab nebula, is an example of the contribution by ancient Chinese to human's understanding of the universe）
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