| 3C273-20210218-S001-R001-B-022522.fts |
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| Only less than 50 stars was detected |
| 3C273-20210218-S001-R001-I-022916.fts |
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| Only less than 50 stars was detected |
| 3C273-20210218-S001-R001-R-022800.fts |
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| Only less than 50 stars was detected |
| 3C273-20210218-S001-R001-V-022644.fts |
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| Only less than 50 stars was detected |