Shulou(Shulou.com)11/24 Report--

CTOnews.com November 22 news, According to Zijinshan Observatory website, Yesterday afternoon,"Kuafu-1" Advanced Space-based Solar Observatory (ASO-S) payload "Hard X-ray Imager"(HXI) The first scientific image was released at Zijinshan Observatory, Chinese Academy of Sciences.

▲ Two-band hard X-ray imaging (25-30 and 30-35 keV, isolines) of solar flares by Kuafu-1 satellite HXI payload superimposed on SDO satellite AIA 1700 Å image background| Source: Zijinshan Observatory CTOnews.com learned that the full name of Kuafu-1 satellite is "Advanced Space-based Solar Observatory"(ASO-S), which was successfully launched at Jiuquan Satellite Center on October 9,2022.

According to the Purple Mountain Observatory, the first HXI image released this time is an image of an M-class flare that erupted at 01:00 (UTC) on November 11,2022, when HXI was only 20 days old. Note that the image has not been rasterized and is only translationally aligned, but the tilt of the image and the sun's axis and the effects of platform wobble have been corrected. From this figure one can see the classical bipedal point-source structure, and one of them has a fine dual-source structure at high energies.

According to introduction, by comparing the HXI data of the "Double Eleven" series flares erupted on November 11 with the images of the Solar Atmospheric Imager (AIA) on the Solar Dynamics Observatory (SDO), it is shown that all functional indicators of HXI have achieved the expected objectives, collimator performance, alignment accuracy, pointing mirror data, detector performance, imaging algorithm, correction algorithm and energy calibration algorithm have achieved ideal results. Even rarer, the 36 micron pitch grating subcollimator, which is the most difficult to align at a distance of 1.2 meters before and after the collimator (with the highest resolution of 3.2 arcseconds), also stands out in imaging. This indicates that the superior imaging performance without grating calibration has exceeded the expectations of the HXI team, and better imaging quality is expected after detailed grating subcollimator calibration in the future.

▲ Light variation and imaging of flare observed by HXI at 03:00 UTC on November 11, 2022. Photovariations of the fully open detector, background detector and dynamic spectra of 10-300 keV are shown respectively (top), and HXI 25-30 keV hard X-ray sources during peak periods (isolines) are superimposed on SDO / AIA 1700 Å images (bottom).| Source: Zijinshan Observatory Zijinshan Observatory pointed out that the image released this time has been compared by many parties and repeatedly confirmed by follow-up observation. It is the first time that China has obtained the solar hard X-ray image, and it is also the only solar hard X-ray image from the perspective of the earth in the world at present. Its image quality has reached the international advanced level.

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