| 3C273-20210411-S001-R001-B-003110.fts |
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| Only less than 50 stars was detected |
| 3C273-20210411-S001-R001-I-003459.fts |
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| Only less than 50 stars was detected |
| 3C273-20210411-S001-R001-R-003344.fts |
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| Only less than 50 stars was detected |
| 3C273-20210411-S001-R001-V-003228.fts |
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| Only less than 50 stars was detected |