Collinder 261 Chandra sources & optical counterparts
收藏B2FIND2026-03-19 收录
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https://b2find.eudat.eu/dataset/b13bc65a-70a0-5e2f-922b-61874997c772
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资源简介：
We present the first X-ray study of Collinder 261 (Cr261), which at an age of 7Gyr is one of the oldest open clusters known in the Galaxy. Our observation with the Chandra X-Ray...
