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

Thanks to CTOnews.com netizen grass Luo Yuzi for the clue delivery! CTOnews.com March 13 news, according to the news of the National Astronomical Observatory of the Chinese Academy of Sciences, with the support of the manned space project, the National Astronomical Observatory Cosmic large-scale structure and Survey Group of the National Astronomical Observatory successfully developed a 9k × 9k full-frame transfer CCD astronomical camera and carried out trial observations on the 80cm Telescope of Xinglong observation Base in conjunction with the CSST scientific data processing system from February 12 to 17, 2023.

This is the first astronomical observation based on 9k × 9k full frame transfer CCD in China, using domestic CCD and imported CCD.

CTOnews.com Note: CCD full name Charge-coupled Device, Chinese name "charge coupled device", is a kind of integrated circuit, there are many neatly arranged capacitors, can sense light, and convert images into digital signals, widely used in digital photography, astronomy, especially photogrammetry (photometry), optical and spectrum telescopes, and high-speed photography. CCD was also used in personal digital cameras in the early years, but it has been widely replaced by CMOS.

According to reports, through this observation, the team obtained g-band images of a number of standard stars, star clusters and galaxies, as well as the corresponding background, dark field and sky flat field. Figure 1 shows the NGC3631 image observed by the imported CCD. Limited by the field of view of the telescope and the size of the filter, only the central area of the target surface is actually used. Figure 2 shows the g-band image of the M38 open cluster, taken for the domestic CCD.

Photo 1:NGC3631 (imported CCD): full picture on the left, local magnification of the galaxy on the right, source of the National Observatory

Picture 2:M38 open star cluster (shot by domestic CCD). According to the National Astronomical Observatory, this observation verifies the performance of the multi-channel, large target surface CCD camera developed by the station, and also provides measured data for the CSST scientific data processing system, which will provide a basis for the follow-up camera and the improvement of domestic CCD.

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