| 3C273-20210503-S001-R001-B-222433.fts |
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| Only less than 50 stars was detected |
| 3C273-20210503-S001-R001-I-222826.fts |
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| Only less than 50 stars was detected |
| 3C273-20210503-S001-R001-R-222710.fts |
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| Only less than 50 stars was detected |
| 3C273-20210503-S001-R001-V-222554.fts |
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| Only less than 50 stars was detected |