| 3C273-20210407-S001-R001-B-002458.fts |
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| Only less than 50 stars was detected |
| 3C273-20210407-S001-R001-I-002848.fts |
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| Only less than 50 stars was detected |
| 3C273-20210407-S001-R001-R-002732.fts |
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| Only less than 50 stars was detected |
| 3C273-20210407-S001-R001-V-002616.fts |
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| Only less than 50 stars was detected |